Merge branch 'experimental' into wireless

# Conflicts:
#	gearslip/src/main/java/app/seb3thehacker/gearslip/ui/HomeScreen.kt

.github/dependabot.yml

@@ -0,0 +1,15 @@
+# Weekly pull requests for newer Gradle libraries and GitHub Actions, aimed at experimental,
+# where unreleased code lands. Security fixes come separately, as soon as an alert opens.
+version: 2
+updates:
+  - package-ecosystem: gradle
+    directory: /
+    target-branch: experimental
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+  - package-ecosystem: github-actions
+    directory: /
+    target-branch: experimental
+    schedule:
+      interval: weekly

.github/workflows/codeql.yml

@@ -0,0 +1,50 @@
+name: CodeQL
+
+# Kotlin can only be scanned while it compiles, so this builds the debug app, the same way
+# release.yml does but without a signing key. Workflow files need no build.
+on:
+  push:
+    branches: [main, experimental]
+  pull_request:
+  schedule:
+    - cron: "0 9 * * 1"
+  workflow_dispatch:
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+      actions: read
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: actions
+            build-mode: none
+          - language: java-kotlin
+            build-mode: manual
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
+
+      - if: matrix.build-mode == 'manual'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "21"
+
+      - if: matrix.build-mode == 'manual'
+        uses: gradle/actions/setup-gradle@v4
+
+      - if: matrix.build-mode == 'manual'
+        run: ./gradlew :gearslip:assembleDebug --no-daemon
+
+      - uses: github/codeql-action/analyze@v4
+        with:
+          category: "/language:${{ matrix.language }}"

.github/workflows/trivy.yml

@@ -0,0 +1,34 @@
+name: Security scan
+
+# Trivy looks through the repository for committed secrets and risky workflow or build
+# settings. Findings show under the Security tab, next to CodeQL's and Dependabot's.
+on:
+  push:
+    branches: [main, experimental]
+  pull_request:
+  schedule:
+    - cron: "0 9 * * 1"
+  workflow_dispatch:
+
+jobs:
+  trivy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: aquasecurity/trivy-action@v0.36.0
+        with:
+          scan-type: fs
+          scanners: vuln,secret,misconfig
+          format: sarif
+          output: trivy.sarif
+          severity: MEDIUM,HIGH,CRITICAL
+
+      - uses: github/codeql-action/upload-sarif@v4
+        if: always()
+        with:
+          sarif_file: trivy.sarif
+          category: trivy

gearslip/build.gradle.kts

@@ -83,21 +83,10 @@ android {
     }
 
     defaultConfig {
-        // Speech-to-text ships for 64-bit ARM only: every phone Gearslip runs on, and one copy
-        // of the native library instead of four.
+        // Speech-to-text (sherpa-onnx, in jniLibs) ships for 64-bit ARM only: every phone
+        // Gearslip runs on, and one copy of the native library instead of four.
         ndk { abiFilters += "arm64-v8a" }
     }
-    ndkVersion = "27.1.12297006"
-    externalNativeBuild {
-        cmake {
-            path = file("src/main/cpp/CMakeLists.txt")
-            version = "3.22.1"
-        }
-    }
-    androidResources {
-        // Model weights barely compress, and stored plainly they stream straight out of the APK.
-        noCompress += "bin"
-    }
 
     testOptions {
         // GearslipLog calls android.util.Log, which is a stub on the local JVM.
@@ -130,6 +119,7 @@ dependencies {
     implementation(platform(libs.androidx.compose.bom))
     implementation(libs.androidx.compose.ui)
     implementation(libs.androidx.compose.material3)
+    implementation(libs.commons.compress)
     implementation(libs.androidx.compose.material.icons.core)
     implementation(libs.androidx.activity.compose)
     implementation(libs.androidx.lifecycle.runtime.compose)

gearslip/src/main/cpp/CMakeLists.txt

@@ -1,36 +0,0 @@
-# Speech-to-text for voice replies and the assistant: whisper.cpp, pinned to one commit and
-# fetched at build time, so nothing outside this folder (cloned-repos included) is needed.
-cmake_minimum_required(VERSION 3.22)
-project(gearslip_speech CXX C)
-
-set(CMAKE_CXX_STANDARD 17)
-
-# Optimised in debug builds too. Unoptimised, Whisper runs several times slower, and a dev build
-# would make voice look far worse than what ships.
-foreach(lang C CXX)
-    set(CMAKE_${lang}_FLAGS_DEBUG "-O3 -DNDEBUG")
-endforeach()
-
-include(FetchContent)
-FetchContent_Declare(
-    whisper
-    URL https://github.com/ggml-org/whisper.cpp/archive/6e4ab854f67f743900934a703d5603419384c961.tar.gz
-    URL_HASH SHA256=55b585aec5e1bc03e2a5cea61da97c6406fa833996cf7daeed704972273cc039
-)
-
-set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
-set(WHISPER_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
-set(WHISPER_BUILD_TESTS OFF CACHE BOOL "" FORCE)
-set(WHISPER_BUILD_SERVER OFF CACHE BOOL "" FORCE)
-set(GGML_OPENMP OFF CACHE BOOL "" FORCE)
-set(GGML_NATIVE OFF CACHE BOOL "" FORCE)
-# ARMv8.2 with half floats and dot products: every phone that runs Android 12 or later in
-# practice, and what makes Whisper fast enough to answer in under a second.
-set(GGML_CPU_ARM_ARCH "armv8.2-a+dotprod+fp16" CACHE STRING "" FORCE)
-FetchContent_MakeAvailable(whisper)
-
-add_library(gearslip_speech SHARED speech_jni.cpp)
-target_compile_options(gearslip_speech PRIVATE -O3)
-find_library(LOG_LIB log)
-target_link_libraries(gearslip_speech whisper android ${LOG_LIB})
-target_link_options(gearslip_speech PRIVATE -Wl,--gc-sections -Wl,-z,max-page-size=16384)

gearslip/src/main/cpp/speech_jni.cpp

@@ -1,86 +0,0 @@
-// The bridge between Kotlin's SpeechEngine and whisper.cpp: load a model, turn one recorded
-// phrase into text, free the model. Recording and deciding when a phrase ends stay in Kotlin.
-
-#include <jni.h>
-#include <android/asset_manager.h>
-#include <android/asset_manager_jni.h>
-#include <android/log.h>
-#include <algorithm>
-#include <cmath>
-#include <string>
-#include "whisper.h"
-
-#define TAG "GearslipSpeech"
-#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__)
-
-static whisper_context_params context_params() {
-    whisper_context_params p = whisper_context_default_params();
-    p.use_gpu = false;
-    return p;
-}
-
-// Streams a model straight out of the APK, so the bundled one is never copied to storage.
-static size_t asset_read(void *ctx, void *output, size_t size) {
-    int n = AAsset_read(static_cast<AAsset *>(ctx), output, size);
-    return n > 0 ? static_cast<size_t>(n) : 0;
-}
-static bool asset_eof(void *ctx) { return AAsset_getRemainingLength64(static_cast<AAsset *>(ctx)) <= 0; }
-static void asset_close(void *ctx) { AAsset_close(static_cast<AAsset *>(ctx)); }
-
-extern "C" JNIEXPORT jlong JNICALL
-Java_app_seb3thehacker_gearslip_speech_SpeechEngine_nativeInitAsset(JNIEnv *env, jobject, jobject assets, jstring jpath) {
-    AAssetManager *manager = AAssetManager_fromJava(env, assets);
-    const char *path = env->GetStringUTFChars(jpath, nullptr);
-    AAsset *asset = AAssetManager_open(manager, path, AASSET_MODE_STREAMING);
-    env->ReleaseStringUTFChars(jpath, path);
-    if (!asset) return 0;
-    whisper_model_loader loader = {asset, asset_read, asset_eof, asset_close};
-    return reinterpret_cast<jlong>(whisper_init_with_params(&loader, context_params()));
-}
-
-// Bytes, not a jstring: NewStringUTF wants modified UTF-8 and aborts on some of what Whisper can
-// write (four-byte characters), so Kotlin decodes the plain UTF-8 instead.
-extern "C" JNIEXPORT jbyteArray JNICALL
-Java_app_seb3thehacker_gearslip_speech_SpeechEngine_nativeTranscribe(
-    JNIEnv *env, jobject, jlong handle, jfloatArray jsamples, jstring jlang, jint threads) {
-    auto *ctx = reinterpret_cast<whisper_context *>(handle);
-    if (!ctx) return env->NewByteArray(0);
-    jsize n = env->GetArrayLength(jsamples);
-    jfloat *samples = env->GetFloatArrayElements(jsamples, nullptr);
-    const char *lang = env->GetStringUTFChars(jlang, nullptr);
-
-    whisper_full_params p = whisper_full_default_params(WHISPER_SAMPLING_GREEDY);
-    p.n_threads = threads;
-    p.language = lang;
-    p.translate = false;
-    p.no_context = true;
-    p.no_timestamps = true;
-    p.single_segment = true;
-    p.print_progress = false;
-    p.print_realtime = false;
-    p.print_special = false;
-    p.print_timestamps = false;
-    p.suppress_blank = true;
-    // The ACFT models are trained for a context cut to the audio's own length (1500 frames is
-    // 30 s, so 50 per second), which is what makes a three-second phrase fast. A little extra
-    // keeps the last word from being clipped.
-    p.audio_ctx = std::min(1500, static_cast<int>(std::ceil(n / 320.0)) + 32);
-
-    int rc = whisper_full(ctx, p, samples, n);
-    env->ReleaseStringUTFChars(jlang, lang);
-    env->ReleaseFloatArrayElements(jsamples, samples, JNI_ABORT);
-    if (rc != 0) {
-        LOGI("whisper_full failed: %d", rc);
-        return env->NewByteArray(0);
-    }
-    std::string text;
-    for (int i = 0; i < whisper_full_n_segments(ctx); i++) text += whisper_full_get_segment_text(ctx, i);
-    jbyteArray out = env->NewByteArray(static_cast<jsize>(text.size()));
-    env->SetByteArrayRegion(out, 0, static_cast<jsize>(text.size()), reinterpret_cast<const jbyte *>(text.data()));
-    return out;
-}
-
-extern "C" JNIEXPORT void JNICALL
-Java_app_seb3thehacker_gearslip_speech_SpeechEngine_nativeFree(JNIEnv *, jobject, jlong handle) {
-    if (handle) whisper_free(reinterpret_cast<whisper_context *>(handle));
-}

gearslip/src/main/java/app/seb3thehacker/gearslip/AppSettings.kt

@@ -9,7 +9,6 @@ object AppSettings {
 
     private const val PREFS = "gearslip_settings"
     private const val KEY_STARTUP_URL = "startup_url"
-    private const val KEY_SEEN_COMPAT_WARNING = "seen_compat_warning"
     private const val KEY_SKIPPED_CERT_SETUP = "skipped_cert_setup"
     private const val KEY_SEEN_PERMISSIONS_SETUP = "seen_permissions_setup"
     private const val KEY_GEARSLIP_ENABLED = "gearslip_enabled"
@@ -32,14 +31,6 @@ object AppSettings {
         prefs(context).edit().putString(KEY_STARTUP_URL, value.trim()).apply()
     }
 
-    /** Whether the newer-car compatibility warning has already been shown and dismissed once. */
-    fun hasSeenCompatWarning(context: Context): Boolean =
-        prefs(context).getBoolean(KEY_SEEN_COMPAT_WARNING, false)
-
-    fun setSeenCompatWarning(context: Context) {
-        prefs(context).edit().putBoolean(KEY_SEEN_COMPAT_WARNING, true).apply()
-    }
-
     /** Whether the certificate setup screen has been deliberately skipped. */
     fun hasSkippedCertSetup(context: Context): Boolean =
         prefs(context).getBoolean(KEY_SKIPPED_CERT_SETUP, false)

gearslip/src/main/java/app/seb3thehacker/gearslip/GearslipActivity.kt

@@ -8,8 +8,10 @@ import android.hardware.usb.UsbAccessory
 import android.hardware.usb.UsbManager
 import android.media.projection.MediaProjection
 import android.media.projection.MediaProjectionManager
+import android.net.Uri
 import android.os.Bundle
 import android.os.ParcelFileDescriptor
+import android.provider.Settings
 import android.view.MotionEvent
 import android.view.Surface
 import android.view.WindowManager
@@ -76,7 +78,13 @@ class GearslipActivity : ComponentActivity(), Projection {
     private val audioPermission = registerForActivityResult(
         androidx.activity.result.contract.ActivityResultContracts.RequestPermission(),
     ) { granted ->
-        if (granted) askAudioCapture() else {
+        if (granted) askAudioCapture()
+        else if (!shouldShowRequestPermissionRationale(android.Manifest.permission.RECORD_AUDIO)) {
+            // Refused twice: Android now says no without showing anything, so the phone must.
+            GearslipLog.w("audio: record permission blocked - Android no longer asks")
+            CarAudio.micBlocked()
+            micBlockedNotice.value = true
+        } else {
             GearslipLog.w("audio: record permission declined")
             CarAudio.denied()
         }
@@ -93,6 +101,9 @@ class GearslipActivity : ComponentActivity(), Projection {
         }
     }
 
+    /** Raised when the microphone permission is blocked; see [MicBlockedDialog]. */
+    private val micBlockedNotice = kotlinx.coroutines.flow.MutableStateFlow(false)
+
     /** Raised once, after the first "no" to the capture dialog; see [AudioChoiceDialog]. */
     private val offerBluetooth = kotlinx.coroutines.flow.MutableStateFlow(false)
 
@@ -154,6 +165,18 @@ class GearslipActivity : ComponentActivity(), Projection {
                         onKeepAsking = ::close,
                     )
                 }
+                val micNotice by micBlockedNotice.collectAsState()
+                if (micNotice) {
+                    app.seb3thehacker.gearslip.ui.MicBlockedDialog(
+                        onOpenSettings = {
+                            micBlockedNotice.value = false
+                            startActivity(
+                                Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, Uri.fromParts("package", packageName, null)),
+                            )
+                        },
+                        onDismiss = { micBlockedNotice.value = false },
+                    )
+                }
             }
         }
 
@@ -179,6 +202,10 @@ class GearslipActivity : ComponentActivity(), Projection {
         Prefetch.warm(this)
         UsageStats.onAppOpened(this)
         app.seb3thehacker.gearslip.update.UpdateChecker.onAppOpened(this)
+        // Back from the app's settings with the microphone turned on: try car audio again.
+        if (checkSelfPermission(android.Manifest.permission.RECORD_AUDIO) == android.content.pm.PackageManager.PERMISSION_GRANTED) {
+            CarAudio.micAllowed()
+        }
     }
 
     override fun onNewIntent(intent: Intent) {

gearslip/src/main/java/app/seb3thehacker/gearslip/GearslipRunner.kt

@@ -45,7 +45,10 @@ class GearslipRunner(
     private lateinit var identityTask: FutureTask<PhoneTls>
 
     /** Sends every message, in order, so no other thread ever blocks on the USB link. See [send]. */
-    private val writer = java.util.concurrent.Executors.newSingleThreadExecutor { Thread(it, "gearslip-writer") }
+    private val writer = java.util.concurrent.Executors.newSingleThreadExecutor {
+        // Sound goes out through here too, so it gets audio's priority: late writes are skips.
+        Thread({ android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_AUDIO); it.run() }, "gearslip-writer")
+    }
 
     /** Waits for the certificate only when TLS is first needed; see [run]. */
     private val tls: PhoneTls by lazy { identityTask.get() }
@@ -88,6 +91,8 @@ class GearslipRunner(
     @Volatile private var lastKeyframeSentAt = 0L
 
     fun run() {
+        // This thread reads the car's acks; audio waits on them, so it can't be left at the back.
+        android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_AUDIO)
         SessionReport.begin()
         log.i("--- session starting ---")
         SessionStatus.connecting("Connected to the head unit")
@@ -260,11 +265,10 @@ class GearslipRunner(
         log.i("<- VersionRequest: head unit speaks $major.$minor")
         SessionReport.protocolVersion(major, minor)
 
-        // PROTOCOL-DOWNGRADE EXPERIMENT. The 2018 Uconnect speaks 1.3 and ACCEPTS the JVC cert;
-        // the 2025 unit speaks 4.3 and rejects it at AuthComplete (-3). If the 4.3 identity check
-        // is tied to the *negotiated* protocol version rather than baked into the firmware,
-        // claiming an older version makes the newer unit skip the check entirely. CLAIM_VERSION
-        // = null restores the previous echo-the-head-unit behaviour.
+        // Always 1.3, on purpose. Every car that accepts Gearslip was tested this way, 1.5 units
+        // included. Echoing the car's own version was tried too: a 4.3 unit rejected the
+        // certificate either way, so the version doesn't decide acceptance. The log says so, since
+        // a car offering 1.5 and getting 1.3 back looks like a bug to anyone reading it.
         val claim = CLAIM_VERSION ?: (major to minor)
         val response = byteArrayOf(
             ((claim.first shr 8) and 0xFF).toByte(), (claim.first and 0xFF).toByte(),
@@ -274,7 +278,10 @@ class GearslipRunner(
         send(MSG_VERSION_RESPONSE, response, encrypted = false)
         log.i(
             "-> VersionResponse: ${claim.first}.${claim.second} status=0 (STATUS_SUCCESS)" +
-                if (CLAIM_VERSION != null) " [FORCED; head unit offered $major.$minor]" else "",
+                if (CLAIM_VERSION != null && claim != (major to minor)) {
+                    " - intended: Gearslip always answers ${claim.first}.${claim.second}, which cars " +
+                        "offering $major.$minor accept too"
+                } else "",
         )
         state = State.TLS_HANDSHAKE
         SessionStatus.connecting("Securing the link")
@@ -1209,9 +1216,9 @@ class GearslipRunner(
 
     private companion object {
         /**
-         * Force the protocol version Gearslip claims in VersionResponse, as (major, minor), or
-         * null to echo the head unit. 1.3 is what the 2018 Uconnect (which accepts the JVC cert)
-         * speaks. This is the 2025 identity-check downgrade experiment: see onVersionRequest.
+         * The protocol version Gearslip answers every car with, as (major, minor), or null to echo
+         * the head unit's. Kept at 1.3 because every working car was tested with it; see
+         * onVersionRequest.
          */
         val CLAIM_VERSION: Pair<Int, Int>? = 1 to 3
 

gearslip/src/main/java/app/seb3thehacker/gearslip/audio/AudioCaptureService.kt

@@ -16,6 +16,7 @@ import android.media.AudioRecord
 import android.media.projection.MediaProjection
 import android.media.projection.MediaProjectionManager
 import android.os.IBinder
+import android.os.Process
 import app.seb3thehacker.gearslip.GearslipLog
 import kotlin.math.abs
 
@@ -147,6 +148,9 @@ class AudioCaptureService : Service() {
 
         reading = true
         thread = Thread({
+            // A busy phone (a map app drawing, the video encoder) would otherwise starve this
+            // loop, and the car hears every late read as a skip.
+            Process.setThreadPriority(Process.THREAD_PRIORITY_URGENT_AUDIO)
             val buffer = ByteArray(CHUNK_BYTES)
             var peak = 0
             var heardAt = System.currentTimeMillis()

gearslip/src/main/java/app/seb3thehacker/gearslip/audio/AudioLink.kt

@@ -147,7 +147,8 @@ class AudioLink(
     fun onFocus(state: Int) {
         val name = FOCUS_STATES[state] ?: "unknown($state)"
         GearslipLog.i("audio: <- AudioFocusResponse state=$name")
-        focusGranted = state == FOCUS_STATE_GAIN || state == FOCUS_STATE_GAIN_TRANSIENT
+        focusGranted = state == FOCUS_STATE_GAIN || state == FOCUS_STATE_GAIN_TRANSIENT ||
+            state == FOCUS_STATE_GAIN_MEDIA_ONLY
         if (focusGranted) startStream() else stop()
     }
 
@@ -257,13 +258,16 @@ class AudioLink(
         private const val FOCUS_RELEASE = 4
         private const val FOCUS_STATE_GAIN = 1
         private const val FOCUS_STATE_GAIN_TRANSIENT = 2
+        private const val FOCUS_STATE_GAIN_MEDIA_ONLY = 6
         private const val SESSION_ID = 2
         private const val STALL_MS = 2_000L
         private const val CHUNK_LOG_EVERY = 200 // about every four seconds
         private const val CONFIG_WAIT_MS = 1_000L
 
+        // AudioFocusStateNotification.AudioFocusState in aasdk.
         private val FOCUS_STATES = mapOf(
-            1 to "GAIN", 2 to "GAIN_TRANSIENT", 3 to "LOSS", 4 to "LOSS_TRANSIENT",
+            1 to "GAIN", 2 to "GAIN_TRANSIENT", 3 to "LOSS", 4 to "LOSS_TRANSIENT_CAN_DUCK",
+            5 to "LOSS_TRANSIENT", 6 to "GAIN_MEDIA_ONLY", 7 to "GAIN_TRANSIENT_GUIDANCE_ONLY",
         )
     }
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/audio/CarAudio.kt

@@ -100,6 +100,26 @@ object CarAudio {
         _capture.value = Capture.DENIED
     }
 
+    private val _micBlocked = MutableStateFlow(false)
+
+    /** The microphone permission is off for good: Android refuses without asking, so say why. */
+    val micBlocked: StateFlow<Boolean> = _micBlocked.asStateFlow()
+
+    fun micBlocked() {
+        _micBlocked.value = true
+        denied()
+    }
+
+    /** The driver turned the permission back on mid-drive: ask for capture again. */
+    fun micAllowed() {
+        if (!_micBlocked.value) return
+        _micBlocked.value = false
+        if (_capture.value == Capture.DENIED) {
+            _capture.value = Capture.OFF
+            if (wanted) request()
+        }
+    }
+
     internal fun captureStarted() {
         _capture.value = Capture.ON
         link?.start()

gearslip/src/main/java/app/seb3thehacker/gearslip/car/AssistantCommands.kt

@@ -1,10 +1,13 @@
 package app.seb3thehacker.gearslip.car
 
 import android.content.Context
+import app.seb3thehacker.gearslip.media.CarMedia
 import java.text.DateFormat
 import java.util.Date
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.withTimeoutOrNull
 
 /**
  * Turns what [CarAssistant] heard into an action plus something to say back.
@@ -17,9 +20,15 @@ import kotlinx.coroutines.withContext
 object AssistantCommands {
 
     suspend fun handle(context: Context, navigator: CarNavigator, frame: CarEnvironment.Frame, heardRaw: String): String {
-        val heard = heardRaw.lowercase().trim()
+        val heard = natural(heardRaw)
+        VoiceHelp.hide()
+        if (heard in HELP_WORDS || heard.startsWith("what can i say") || heard.startsWith("what can you do")) {
+            VoiceHelp.show()
+            return "Here's what you can say."
+        }
 
         navigateCommand(context, navigator, frame, heard)?.let { return it }
+        playSearchCommand(context, navigator, heard)?.let { return it }
         mediaCommand(heard)?.let { return it }
         navCommand(navigator, heard)?.let { return it }
         infoCommand(heard)?.let { return it }
@@ -29,6 +38,42 @@ object AssistantCommands {
         return "I don't know how to do that yet."
     }
 
+    /**
+     * What was said, minus the padding people wrap a command in: "hey", "can you", "I want to",
+     * "please", "thanks". Each command below then only has to know its own words.
+     */
+    private fun natural(raw: String): String {
+        var t = raw.lowercase().replace(Regex("[.,!?]"), " ").replace(Regex("\\s+"), " ").trim()
+        var changed = true
+        while (changed) {
+            changed = false
+            for (lead in LEAD_FILLERS) if (t.startsWith("$lead ")) { t = t.removePrefix("$lead ").trim(); changed = true }
+            for (tail in TAIL_FILLERS) if (t.endsWith(" $tail")) { t = t.removeSuffix(" $tail").trim(); changed = true }
+        }
+        return t
+    }
+
+    /** The part after the first of [triggers] that [text] starts with, or null. */
+    private fun after(text: String, triggers: List<String>): String? =
+        triggers.firstOrNull { text.startsWith(it) }?.let { text.removePrefix(it).trim() }
+
+    private suspend fun allEntries(context: Context): List<Entry> {
+        val vehicleData = CarSettings.experimentalFeaturesEnabled.value && CarSettings.carSensorsEnabled.value
+        val builtIn = BuiltInApps.entries.filter { it.builtIn !== BuiltInApps.VehicleData || vehicleData }
+        return builtIn + (LauncherCache.entries ?: withContext(Dispatchers.IO) { LauncherCache.load(context) })
+    }
+
+    /** Best label match: exact, then a label starting with [name], then one containing it. */
+    private fun <T> bestMatch(items: List<T>, name: String, label: (T) -> String): T? {
+        val n = name.removePrefix("the ").removePrefix("my ").removeSuffix(" app").trim()
+        if (n.isEmpty()) return null
+        items.firstOrNull { label(it).lowercase() == n }?.let { return it }
+        // Loose matches need a real word: "pizza in a" mustn't pick "Organic Maps" for its "a".
+        if (n.length < 3) return null
+        return items.firstOrNull { label(it).lowercase().startsWith(n) }
+            ?: items.firstOrNull { label(it).lowercase().contains(n) }
+    }
+
     /**
      * "navigate to X [with|using|on|via Y]" - Y picks the nav app by (partial) label; without it,
      * whichever nav app was used last, or the only one installed, or the first one found. Starts
@@ -42,29 +87,45 @@ object AssistantCommands {
         frame: CarEnvironment.Frame,
         heard: String,
     ): String? {
-        val trigger = NAVIGATE_TRIGGERS.firstOrNull { heard.startsWith(it) } ?: return null
-        var destination = heard.removePrefix(trigger).trim()
+        // "use Organic Maps to get to X", "open OsmAnd and navigate to X": the app comes first.
+        var text = heard
+        var leadingApp: String? = null
+        Regex("^(?:use|using|with|open|in|on) (.+?) (?:to |and )(.+)$").find(text)?.let { m ->
+            if (after(m.groupValues[2], NAVIGATE_TRIGGERS) != null) {
+                leadingApp = m.groupValues[1]
+                text = m.groupValues[2]
+            }
+        }
+        var destination = after(text, NAVIGATE_TRIGGERS) ?: return null
         if (destination.isBlank()) return "Where to?"
 
-        var appName: String? = null
-        for (sep in listOf(" with ", " using ", " on ", " via ")) {
-            val at = destination.lastIndexOf(sep)
-            if (at > 0) {
-                appName = destination.substring(at + sep.length).trim()
+        val entries = allEntries(context)
+        // "go to Spotify" means the app, and "go to settings" the screen; "go to Target" is a place.
+        val asApp = destination.removePrefix("the ").removeSuffix(" app")
+        if (text.startsWith("go to ") &&
+            (asApp in SCREEN_WORDS || asApp in APP_NICKNAMES || entries.any { it.label.lowercase() == asApp })
+        ) {
+            return null
+        }
+        val navApps = entries.filter { it.template?.isNavigation == true }
+        if (navApps.isEmpty()) return "You don't have any navigation apps installed."
+
+        // "X with Organic Maps", "X on OsmAnd": split only when the end names a nav app, so a
+        // place like "Starbucks on Main Street" stays whole.
+        var chosenApp = leadingApp?.let { name -> bestMatch(navApps, name) { it.label } ?: return "I couldn't find a navigation app called $name." }
+        if (chosenApp == null) {
+            for (sep in listOf(" with ", " using ", " on ", " via ", " in ", " through ")) {
+                val at = destination.lastIndexOf(sep)
+                if (at <= 0) continue
+                val app = bestMatch(navApps, destination.substring(at + sep.length)) { it.label } ?: continue
+                chosenApp = app
                 destination = destination.substring(0, at).trim()
                 break
             }
         }
         if (destination.isBlank()) return "Where to?"
 
-        val entries = LauncherCache.entries ?: withContext(Dispatchers.IO) { LauncherCache.load(context) }
-        val navApps = entries.filter { it.template?.isNavigation == true }
-        if (navApps.isEmpty()) return "You don't have any navigation apps installed."
-
-        val requestedApp = appName
-        val chosen = when {
-            requestedApp != null -> navApps.firstOrNull { it.label.lowercase().contains(requestedApp) }
-                ?: return "I couldn't find a navigation app called $requestedApp."
+        val chosen = chosenApp ?: when {
             navApps.size == 1 -> navApps.first()
             else -> navApps.firstOrNull { it.componentId == CarSettings.lastNav.value } ?: navApps.first()
         }
@@ -75,26 +136,84 @@ object AssistantCommands {
         return "Navigating to $destination with ${chosen.label}."
     }
 
+    /**
+     * "play X" with something after it: a song, artist, album or playlist, asked of the music app
+     * that's open through its own search ([CarMedia.search]). A bare "play", or "play music",
+     * falls through to resume.
+     */
+    private suspend fun playSearchCommand(context: Context, navigator: CarNavigator, heard: String): String? {
+        var query = after(heard, PLAY_TRIGGERS) ?: return null
+        query = query.removePrefix("some ").trim()
+        if (query.isEmpty() || query in RESUME_WORDS) return null
+        val media = CarServices.media
+
+        // "play Daft Punk on Metrolist": switch to that app first, if it's one we know.
+        for (sep in listOf(" on ", " in ", " from ", " with ", " using ")) {
+            val at = query.lastIndexOf(sep)
+            if (at <= 0) continue
+            val apps = withContext(Dispatchers.IO) { app.seb3thehacker.gearslip.media.MediaCatalog.installed(context) }
+            val wanted = bestMatch(apps, query.substring(at + sep.length)) { it.label } ?: continue
+            query = query.substring(0, at).trim()
+            if (query.isEmpty() || query in RESUME_WORDS) {
+                CarServices.openMedia(wanted, autoplay = true)
+                navigator.media()
+                return "Opening ${wanted.label}."
+            }
+            if (CarServices.mediaApp.value?.component != wanted.component) {
+                CarServices.openMedia(wanted)
+                navigator.media()
+                // Give it a moment to connect before asking it to search.
+                withTimeoutOrNull(APP_CONNECT_MS) {
+                    while (media.appLabel == null || (!media.canSearchLibrary && !media.now.value.canSearch)) delay(200)
+                }
+            }
+            break
+        }
+
+        // No music app open, or its connection is gone (the app was closed): use the one played
+        // last, the way "play X" works on Android Auto.
+        val phase = media.phase.value
+        if (media.appLabel == null || phase == CarMedia.Phase.IDLE || phase == CarMedia.Phase.REJECTED) {
+            if (!CarServices.reopenLastMedia()) return "Open a music app first, then ask again."
+            navigator.media()
+        }
+        withTimeoutOrNull(APP_CONNECT_MS) {
+            while (media.phase.value != CarMedia.Phase.READY || media.appLabel == null ||
+                (!media.canSearchLibrary && !media.now.value.canSearch)
+            ) delay(200)
+        }
+        val app = media.appLabel ?: return "Your music app didn't open in time. Try again."
+        if (!media.canSearchLibrary && !media.now.value.canSearch) {
+            return "$app ignores voice searches. Pick something on its screen instead."
+        }
+        media.playBestMatch(query)
+        return "Looking for $query on $app."
+    }
+
     private fun mediaCommand(heard: String): String? {
         val media = CarServices.media
         return when {
-            "pause" in heard || heard.startsWith("stop") -> {
+            "pause" in heard || heard.startsWith("stop") || heard == "quiet" || heard == "shut up" -> {
                 if (media.now.value.playing) media.togglePlay()
                 "Paused."
             }
-            "resume" in heard || (heard.startsWith("play") && "playing" !in heard) -> {
+            "resume" in heard || "unpause" in heard || heard in RESUME_PHRASES ||
+                (heard.startsWith("play") && "playing" !in heard) -> {
                 if (!media.now.value.playing) media.togglePlay()
                 "Playing."
             }
-            "next" in heard || "skip" in heard -> {
+            "next" in heard || "skip" in heard || heard.startsWith("change the song") -> {
                 media.next()
                 "Skipping."
             }
-            "previous" in heard || "last song" in heard || "back song" in heard -> {
+            "previous" in heard || "last song" in heard || "back song" in heard || "go back a song" in heard ||
+                "play that again" in heard || "replay" in heard -> {
                 media.previous()
                 "Playing the previous track."
             }
-            "what" in heard && "playing" in heard -> {
+            ("what" in heard && "playing" in heard) || "what song" in heard || "who sings" in heard ||
+                "who's singing" in heard || "who is singing" in heard || "what's this song" in heard ||
+                "name of this song" in heard -> {
                 val now = media.now.value
                 if (now.isActive) listOf(now.title, now.artist).filter { it.isNotBlank() }.joinToString(" by ")
                 else "Nothing's playing."
@@ -104,11 +223,19 @@ object AssistantCommands {
     }
 
     private fun navCommand(navigator: CarNavigator, heard: String): String? = when {
-        "go home" in heard || heard == "home" -> {
+        heard == "go back" || heard == "back" -> {
+            navigator.back()
+            "Going back."
+        }
+        heard in EXIT_WORDS -> {
+            BuiltInApps.Exit.open(navigator)
+            "Back to the car's screen."
+        }
+        "go home" in heard || heard == "home" || heard == "home screen" || "go to the home screen" in heard -> {
             navigator.home()
             "Heading home."
         }
-        "open apps" in heard || heard == "apps" || "app list" in heard -> {
+        "open apps" in heard || heard == "apps" || "app list" in heard || "all apps" in heard || "my apps" in heard || heard == "go to apps" -> {
             navigator.apps()
             "Here are your apps."
         }
@@ -128,9 +255,10 @@ object AssistantCommands {
     }
 
     private fun infoCommand(heard: String): String? = when {
-        "what time" in heard || "what's the time" in heard ->
+        "what time" in heard || "what's the time" in heard || heard == "time" || "the time" in heard ->
             "It's ${DateFormat.getTimeInstance(DateFormat.SHORT).format(Date())}."
-        "weather" in heard -> {
+        "weather" in heard || "going to rain" in heard || "gonna rain" in heard || "how hot" in heard ||
+            "how cold" in heard || "temperature outside" in heard -> {
             val data = (Weather.state.value as? WeatherState.Ready)?.data
             if (data != null) "${data.temp}${data.tempUnit} and ${Weather.describe(data.code)} in ${data.place}."
             else "I don't have the weather yet."
@@ -139,12 +267,11 @@ object AssistantCommands {
     }
 
     private suspend fun callCommand(context: Context, heard: String): String? {
-        val name = when {
-            heard.startsWith("call ") -> heard.removePrefix("call ")
-            heard.startsWith("phone ") -> heard.removePrefix("phone ")
-            heard.startsWith("dial ") -> heard.removePrefix("dial ")
-            else -> return null
-        }.trim()
+        val name = (
+            after(heard, CALL_TRIGGERS)
+                ?: Regex("^give (.+) a (?:call|ring)$").find(heard)?.groupValues?.get(1)
+                ?: return null
+            ).replace(Regex(" (?:on|at) (?:their |his |her )?(?:mobile|cell|phone|home|work)$"), "").trim()
         if (name.isBlank()) return "Who should I call?"
         if (!hasCallPermissions(context)) return "Gearslip needs the phone and contacts permissions first, from the phone screen."
 
@@ -162,21 +289,59 @@ object AssistantCommands {
         frame: CarEnvironment.Frame,
         heard: String,
     ): String? {
-        val name = when {
-            heard.startsWith("open ") -> heard.removePrefix("open ")
-            heard.startsWith("launch ") -> heard.removePrefix("launch ")
-            heard.startsWith("start ") -> heard.removePrefix("start ")
-            else -> return null
-        }.trim()
+        val name = (after(heard, OPEN_TRIGGERS) ?: return null)
+            .removePrefix("the ").removePrefix("my ").removeSuffix(" app").trim()
         if (name.isBlank()) return null
+        val wanted = APP_NICKNAMES[name] ?: name
 
-        val entries = LauncherCache.entries ?: withContext(Dispatchers.IO) { LauncherCache.load(context) }
-        val match = entries.firstOrNull { it.label.lowercase().contains(name) }
+        // Gearslip's own apps come first in the list, so "phone" opens its dialer, not the phone's.
+        val match = bestMatch(allEntries(context), wanted) { it.label }
             ?: return "I couldn't find an app called $name."
 
         launchEntry(match, navigator, frame)
         return "Opening ${match.label}."
     }
 
-    private val NAVIGATE_TRIGGERS = listOf("navigate to ", "directions to ", "take me to ", "drive to ")
+    private val EXIT_WORDS = setOf("exit", "exit gearslip", "close gearslip", "quit", "quit gearslip", "open exit")
+
+    /** Other names people use for Gearslip's own apps. */
+    private val APP_NICKNAMES = mapOf(
+        "web" to "browser", "internet" to "browser", "the web" to "browser", "web browser" to "browser",
+        "dialer" to "phone", "the dialer" to "phone", "keypad" to "phone",
+        "screen share" to "screen sharing", "screen mirroring" to "screen sharing", "mirroring" to "screen sharing",
+    )
+
+    private val NAVIGATE_TRIGGERS = listOf(
+        "navigate to ", "navigate me to ", "directions to ", "get directions to ", "give me directions to ",
+        "take me to ", "drive to ", "drive me to ", "get me to ", "go to ", "head to ", "route to ",
+        "how do i get to ", "show me the way to ", "find a route to ", "navigation to ", "get to ",
+    )
+
+    private val PLAY_TRIGGERS = listOf("play me ", "play ", "put on ", "listen to ", "i want to hear ", "shuffle ")
+
+    private val CALL_TRIGGERS = listOf("call ", "phone ", "dial ", "ring ", "make a call to ", "place a call to ", "start a call with ")
+
+    private val OPEN_TRIGGERS = listOf("open ", "launch ", "start ", "go to ", "switch to ", "show me ", "bring up ", "pull up ")
+
+    /** Screens "go to X" means rather than a place. */
+    private val SCREEN_WORDS = setOf("settings", "home", "the home screen", "home screen", "apps", "my apps", "all apps")
+
+    /** Padding stripped from the front of a command, longest first where they overlap. */
+    private val LEAD_FILLERS = listOf(
+        "hey gearslip", "ok gearslip", "okay gearslip", "gearslip", "hey", "ok", "okay", "um", "uh", "so",
+        "please", "can you please", "can you", "could you", "would you", "will you", "can i", "could i",
+        "i want you to", "i want to", "i'd like to", "i would like to", "i wanna", "i need to", "i need you to",
+        "let's", "lets", "go ahead and", "just", "now", "quickly",
+    )
+
+    /** Longest first, so "right now" goes whole rather than leaving "right". */
+    private val TAIL_FILLERS = listOf("thank you very much", "thank you", "right now", "for me", "please", "thanks", "now")
+
+    private const val APP_CONNECT_MS = 5_000L
+
+    private val HELP_WORDS = setOf("help", "commands", "voice commands", "list commands", "show commands")
+
+    private val RESUME_WORDS = setOf("music", "the music", "some music", "something", "it", "again", "that", "my music")
+
+    private val RESUME_PHRASES = setOf("keep playing", "continue", "keep going", "start the music", "music on", "turn the music back on")
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/AssistantOverlay.kt

@@ -4,7 +4,21 @@ import app.seb3thehacker.gearslip.car.theme.*
 import android.content.Intent
 import android.net.Uri
 import android.provider.Settings
+import androidx.compose.animation.core.FastOutSlowInEasing
+import androidx.compose.animation.core.RepeatMode
+import androidx.compose.animation.core.animateFloat
+import androidx.compose.animation.core.infiniteRepeatable
+import androidx.compose.animation.core.rememberInfiniteTransition
+import androidx.compose.animation.core.tween
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.scale
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -30,47 +44,66 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 
 /**
- * The band that appears while [CarAssistant] is listening, thinking or speaking - a thin strip
- * across the top, same idea as [CallOverlay]'s active-call banner, so it never blocks the screen
- * the driver was already looking at.
+ * What the assistant hears and says, laid over the bottom of whatever screen is up: a dark shade
+ * so white words read over a bright map, and a glow along the bottom edge in the phone's own
+ * colours that breathes while listening. The shade passes touches through; only the buttons take them.
  */
 @Composable
 fun AssistantOverlay(modifier: Modifier = Modifier) {
     val state by CarAssistant.state.collectAsState()
     if (state.phase == CarAssistant.Phase.IDLE) return
     val context = LocalContext.current
+    val listening = state.phase == CarAssistant.Phase.LISTENING && state.ready
+    val glow = MaterialTheme.colorScheme.primary
+    val glow2 = MaterialTheme.colorScheme.tertiary
+    val breathe by rememberInfiniteTransition(label = "glow").animateFloat(
+        0.55f, 1f, infiniteRepeatable(tween(900, easing = FastOutSlowInEasing), RepeatMode.Reverse), label = "glow",
+    )
+    val strength = when (state.phase) {
+        CarAssistant.Phase.LISTENING -> if (state.ready) breathe else 0.3f
+        CarAssistant.Phase.ERROR -> 0.3f
+        else -> 0.6f
+    }
 
-    Surface(
-        color = MaterialTheme.colorScheme.primaryContainer,
-        contentColor = MaterialTheme.colorScheme.onPrimaryContainer,
-        modifier = modifier.fillMaxWidth(),
-    ) {
-        Row(
-            Modifier.padding(horizontal = 16.dp, vertical = 10.dp),
-            verticalAlignment = Alignment.CenterVertically,
-            horizontalArrangement = Arrangement.spacedBy(12.dp),
-        ) {
-            PulsingMic(state.phase == CarAssistant.Phase.LISTENING)
-            Column(Modifier.weight(1f)) {
-                Text(
-                    when (state.phase) {
-                        CarAssistant.Phase.LISTENING -> "Listening…"
-                        CarAssistant.Phase.THINKING -> "…"
-                        CarAssistant.Phase.SPEAKING -> state.reply
-                        CarAssistant.Phase.ERROR -> state.reply
-                        CarAssistant.Phase.IDLE -> ""
-                    },
-                    style = MaterialTheme.typography.titleSmall,
-                    fontWeight = FontWeight.SemiBold,
-                    maxLines = 2,
-                )
-                if (state.heard.isNotBlank() && state.phase != CarAssistant.Phase.SPEAKING) {
-                    Text(
-                        "\"${state.heard}\"",
-                        style = MaterialTheme.typography.bodySmall,
+    Box(
+        modifier
+            .fillMaxWidth()
+            .drawBehind {
+                drawRect(Brush.verticalGradient(0f to Color.Transparent, 0.45f to Color.Black.copy(alpha = 0.6f), 1f to Color.Black.copy(alpha = 0.85f)))
+                // A wide, flat oval of light rising from the bottom edge.
+                scale(1f, 0.22f, Offset(size.width / 2, size.height)) {
+                    drawCircle(
+                        Brush.radialGradient(
+                            0f to glow.copy(alpha = 0.9f * strength), 0.5f to glow2.copy(alpha = 0.35f * strength), 1f to Color.Transparent,
+                            center = Offset(size.width / 2, size.height), radius = size.width * 0.55f,
+                        ),
+                        radius = size.width * 0.55f, center = Offset(size.width / 2, size.height),
                     )
                 }
             }
+            .padding(start = 16.dp, end = 16.dp, top = 56.dp, bottom = 20.dp),
+    ) {
+        Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(16.dp)) {
+            PulsingMic(listening)
+            Column(Modifier.weight(1f), horizontalAlignment = Alignment.CenterHorizontally) {
+                val (small, big) = when (state.phase) {
+                    CarAssistant.Phase.LISTENING -> "" to state.heard.ifBlank { if (state.ready) "Listening…" else "One moment…" }
+                    CarAssistant.Phase.THINKING -> "" to state.heard.ifBlank { "…" }
+                    else -> state.heard to state.reply
+                }
+                if (small.isNotBlank()) {
+                    Text(small, color = Color.White.copy(alpha = 0.7f), style = MaterialTheme.typography.bodyLarge, maxLines = 1, overflow = TextOverflow.Ellipsis)
+                }
+                Text(
+                    big,
+                    color = if (big == "Listening…" || big == "One moment…" || big == "…") Color.White.copy(alpha = 0.7f) else Color.White,
+                    style = MaterialTheme.typography.headlineSmall,
+                    fontWeight = FontWeight.SemiBold,
+                    textAlign = TextAlign.Center,
+                    maxLines = 2,
+                    overflow = TextOverflow.Ellipsis,
+                )
+            }
             if (state.missingPermission) {
                 GsButton(tone = GsTone.Tonal, onClick = {
                     context.startActivity(

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarApps.kt

@@ -22,7 +22,7 @@ class CarApp(
 object CarApps {
 
     val all: List<CarApp> = listOf(
-        CarApp("web", "Web", Icons.Filled.Search) {
+        CarApp("web", "Browser", Icons.Filled.Search) {
             WebApp(content = ProjectedContent.resolve(LocalContext.current))
         },
         CarApp("phone", "Screen sharing", Icons.Filled.Share) {

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarAssistant.kt

@@ -38,6 +38,8 @@ object CarAssistant {
         val heard: String = "",
         val reply: String = "",
         val missingPermission: Boolean = false,
+        /** False from the press until the microphone is actually open, so the overlay doesn't claim to listen early. */
+        val ready: Boolean = false,
     )
 
     private val _state = MutableStateFlow(State())
@@ -89,6 +91,7 @@ object CarAssistant {
         tts?.stop()
         _state.value = State(Phase.LISTENING)
         listenOnce(
+            onListening = { _state.value = _state.value.copy(ready = true) },
             onPartial = { text -> _state.value = _state.value.copy(heard = text) },
             onHeard = { _state.value = _state.value.copy(phase = Phase.THINKING) },
             onResult = { text ->
@@ -174,15 +177,16 @@ object CarAssistant {
         onSpeaking: () -> Unit = {},
     ) {
         cancel()
-        listenOnce(onPartial, onHeard = {}, onResult, onError, cue, onSpeaking)
+        listenOnce(onPartial, onHeard = {}, onResult = onResult, onError = onError, cue = cue, onSpeaking = onSpeaking)
     }
 
     /**
-     * One phrase, through Gearslip's own [SpeechEngine]. The phone's recognizer is only a fallback
-     * for when the engine itself can't run, since plenty of phones (GrapheneOS among them) have none.
+     * One phrase, through Gearslip's own [SpeechEngine], or the phone's recognizer when the driver
+     * chose it in settings. Never the phone's on its own: on most phones that's Google's.
      */
     private fun listenOnce(
         onPartial: (String) -> Unit,
+        onListening: () -> Unit = {},
         onHeard: () -> Unit,
         onResult: (String) -> Unit,
         onError: (String) -> Unit,
@@ -190,24 +194,24 @@ object CarAssistant {
         onSpeaking: () -> Unit = {},
     ) {
         val context = appContext ?: return onError("Speech isn't ready yet.")
+        if (CarSettings.systemSpeech.value && SpeechRecognizer.isRecognitionAvailable(context)) {
+            return systemListen(context, onListening, onPartial, onHeard, onResult, onError)
+        }
         SpeechEngine.listen(
             context,
             cue = cue,
             onSpeaking = onSpeaking,
+            onPartial = onPartial,
+            onListening = onListening,
             onHeard = onHeard,
             onResult = onResult,
-            onError = { message ->
-                if (message == SpeechEngine.NOT_LOADED && SpeechRecognizer.isRecognitionAvailable(context)) {
-                    systemListen(context, onPartial, onHeard, onResult, onError)
-                } else {
-                    onError(message)
-                }
-            },
+            onError = onError,
         )
     }
 
     private fun systemListen(
         context: Context,
+        onListening: () -> Unit,
         onPartial: (String) -> Unit,
         onHeard: () -> Unit,
         onResult: (String) -> Unit,
@@ -216,7 +220,7 @@ object CarAssistant {
         val r = SpeechRecognizer.createSpeechRecognizer(context)
         recognizer = r
         r.setRecognitionListener(object : RecognitionListener {
-            override fun onReadyForSpeech(params: Bundle?) {}
+            override fun onReadyForSpeech(params: Bundle?) = onListening()
             override fun onBeginningOfSpeech() {}
             override fun onRmsChanged(rmsdB: Float) {}
             override fun onBufferReceived(buffer: ByteArray?) {}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarKeyboard.kt

@@ -138,18 +138,18 @@ fun CarKeyboard(
                 }
 
                 // Control row: no backspace here - it stays with the letters above, not next to the
-                // key most likely to be hit right after it by mistake. Dismiss (when offered) is the
-                // last key, bottom-right corner of the keyboard.
+                // key most likely to be hit right after it by mistake. Search/enter takes the
+                // bottom-right corner, where a thumb expects it; dismiss (when offered) sits left of it.
                 Row(
                     Modifier.fillMaxWidth(),
                     horizontalArrangement = Arrangement.spacedBy(4.dp),
                 ) {
                     Key(if (symbols) "abc" else "?123", Modifier.weight(1.4f)) { symbols = !symbols }
                     Key("space", Modifier.weight(if (onDismiss != null) 3.2f else 4f)) { onTextChange("$text ") }
-                    SubmitKey(Modifier.weight(1.6f), submitIcon, submitImage, onSubmit)
                     if (onDismiss != null) {
                         DismissKey(onDismiss, Modifier.weight(1.4f))
                     }
+                    SubmitKey(Modifier.weight(1.6f), submitIcon, submitImage, onSubmit)
                 }
             }
         }
@@ -222,9 +222,9 @@ private fun SubmitKey(modifier: Modifier, search: Boolean, image: ImageVector?,
  * Big enough to hit on a bumpy road, small enough that four rows plus a field plus a few results
  * still fit. A 480-tall screen sets the floor; a taller one (LIVI's 1280x720) gets bigger keys.
  */
-private fun keyHeight(screenHeightDp: Int): Dp = (screenHeightDp * 0.075f).dp.coerceIn(36.dp, 52.dp)
+private fun keyHeight(screenHeightDp: Int): Dp = (screenHeightDp * 0.09f).dp.coerceIn(44.dp, 64.dp)
 
-private val LocalKeyHeight = compositionLocalOf { 36.dp }
+private val LocalKeyHeight = compositionLocalOf { 44.dp }
 
 private val LETTER_ROWS = listOf(
     "qwertyuiop".map { it.toString() },

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarKeys.kt

@@ -102,15 +102,10 @@ object CarKeys {
 
     /**
      * The voice key: answers the message on screen if there is one, otherwise starts the
-     * assistant when it's turned on.
+     * assistant.
      */
     private fun voice() = main.post {
-        if (VoiceReply.onVoiceKey()) return@post
-        if (CarSettings.experimentalFeaturesEnabled.value && CarSettings.voiceAssistantEnabled.value) {
-            CarAssistant.start()
-        } else {
-            GearslipLog.i("keys: voice pressed, but the assistant is off in settings")
-        }
+        if (!VoiceReply.onVoiceKey()) CarAssistant.start()
     }
 
     /** Answers a ringing call; with nothing ringing, opens the phone screen. */

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarServices.kt

@@ -247,6 +247,8 @@ object CarServices {
         runCatching { media.disconnect() }
         runCatching { browse.disconnect() }
         CarAssistant.cancel()
+        // About 900 MB that nothing needs once the car's gone.
+        app.seb3thehacker.gearslip.speech.SpeechEngine.unload()
         CarAudio.release()
         _mediaApp.value = null
         navStopped = false

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarSettings.kt

@@ -38,9 +38,8 @@ object CarSettings {
     private const val KEY_PINNED = "car_pinned_apps"
     private const val KEY_APP_ORDER = "car_app_order"
     private const val KEY_EXPERIMENTAL_FEATURES = "car_experimental_features"
-    private const val KEY_VOICE_ASSISTANT = "car_voice_assistant"
+    private const val KEY_SYSTEM_SPEECH = "car_system_speech"
     private const val KEY_CAR_SENSORS = "car_sensors_enabled"
-    private const val KEY_MEDIA_SEARCH = "car_media_search_enabled"
     private const val KEY_SEEN_SAFETY_WARNING = "car_seen_safety_warning"
     private const val KEY_UNITS = "car_units"
     private const val KEY_WHATS_NEW = "car_whats_new_after_updates"
@@ -72,9 +71,8 @@ object CarSettings {
     private val pinnedFlow = MutableStateFlow<Set<String>>(emptySet())
     private val appOrderFlow = MutableStateFlow<List<String>>(emptyList())
     private val experimentalFeaturesFlow = MutableStateFlow(false)
-    private val voiceAssistantFlow = MutableStateFlow(false)
+    private val systemSpeechFlow = MutableStateFlow(false)
     private val carSensorsFlow = MutableStateFlow(false)
-    private val mediaSearchFlow = MutableStateFlow(false)
     private val seenSafetyWarningFlow = MutableStateFlow(false)
     private val unitsFlow = MutableStateFlow(Units.AUTO)
 
@@ -170,12 +168,8 @@ object CarSettings {
      */
     val experimentalFeaturesEnabled: StateFlow<Boolean> = experimentalFeaturesFlow
 
-    /**
-     * The voice assistant is experimental and off by default; a driver has to turn it on
-     * knowingly, from the settings screen, after reading the warning shown there. This flag
-     * alone does not run the assistant - [experimentalFeaturesEnabled] must also be on.
-     */
-    val voiceAssistantEnabled: StateFlow<Boolean> = voiceAssistantFlow
+    /** Listen with the phone's own speech service instead of Gearslip's on-device model. */
+    val systemSpeech: StateFlow<Boolean> = systemSpeechFlow
 
     /**
      * Vehicle data is experimental and off by default: the launcher's tile for it, and the
@@ -185,13 +179,6 @@ object CarSettings {
      */
     val carSensorsEnabled: StateFlow<Boolean> = carSensorsFlow
 
-    /**
-     * Searching inside a media app is experimental and off by default: many apps claim to take
-     * searches and then ignore them or play something else. The media screen's search button
-     * shows only once this and [experimentalFeaturesEnabled] are both on.
-     */
-    val mediaSearchEnabled: StateFlow<Boolean> = mediaSearchFlow
-
     /**
      * Whether the car screen's own "drive safely" warning has already been shown and dismissed
      * once, from this same install. Separate from the phone side's own compat/safety dialogs -
@@ -226,9 +213,8 @@ object CarSettings {
         appOrderFlow.value = AppSettings.getString(app, KEY_APP_ORDER, "")
             .split(",").filter { it.isNotEmpty() }
         experimentalFeaturesFlow.value = AppSettings.getString(app, KEY_EXPERIMENTAL_FEATURES, "false") == "true"
-        voiceAssistantFlow.value = AppSettings.getString(app, KEY_VOICE_ASSISTANT, "false") == "true"
+        systemSpeechFlow.value = AppSettings.getString(app, KEY_SYSTEM_SPEECH, "false") == "true"
         carSensorsFlow.value = AppSettings.getString(app, KEY_CAR_SENSORS, "false") == "true"
-        mediaSearchFlow.value = AppSettings.getString(app, KEY_MEDIA_SEARCH, "false") == "true"
         seenSafetyWarningFlow.value = AppSettings.getString(app, KEY_SEEN_SAFETY_WARNING, "false") == "true"
         unitsFlow.value = runCatching {
             Units.valueOf(AppSettings.getString(app, KEY_UNITS, Units.AUTO.name))
@@ -293,9 +279,9 @@ object CarSettings {
         AppSettings.putString(app, KEY_EXPERIMENTAL_FEATURES, on.toString())
     }
 
-    fun setVoiceAssistantEnabled(on: Boolean) {
-        voiceAssistantFlow.value = on
-        AppSettings.putString(app, KEY_VOICE_ASSISTANT, on.toString())
+    fun setSystemSpeech(on: Boolean) {
+        systemSpeechFlow.value = on
+        AppSettings.putString(app, KEY_SYSTEM_SPEECH, on.toString())
     }
 
     fun setCarSensorsEnabled(on: Boolean) {
@@ -303,11 +289,6 @@ object CarSettings {
         AppSettings.putString(app, KEY_CAR_SENSORS, on.toString())
     }
 
-    fun setMediaSearchEnabled(on: Boolean) {
-        mediaSearchFlow.value = on
-        AppSettings.putString(app, KEY_MEDIA_SEARCH, on.toString())
-    }
-
     fun setNightMode(mode: NightMode) {
         nightFlow.value = mode
         AppSettings.putString(app, KEY_NIGHT, mode.name)

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarSettingsScreen.kt

@@ -58,9 +58,8 @@ fun CarSettingsScreen() {
     val theme by CarSettings.appTheme.collectAsState()
     val uiTheme by CarSettings.uiTheme.collectAsState()
     val experimentalFeatures by CarSettings.experimentalFeaturesEnabled.collectAsState()
-    val voiceAssistant by CarSettings.voiceAssistantEnabled.collectAsState()
     val carSensors by CarSettings.carSensorsEnabled.collectAsState()
-    val mediaSearch by CarSettings.mediaSearchEnabled.collectAsState()
+    val systemSpeech by CarSettings.systemSpeech.collectAsState()
     val display by CarEnvironment.display.collectAsState()
     val vehicle by CarEnvironment.vehicle.collectAsState()
     val context = LocalContext.current
@@ -138,6 +137,14 @@ fun CarSettingsScreen() {
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
 
+        ExperimentalFeatureRow(
+            title = "Use the phone's speech recognition",
+            description = "Listens through the phone's own speech service instead of Gearslip's. On " +
+                "most phones that's Google's, which may send your voice to Google. GrapheneOS has " +
+                "none, so Gearslip keeps using its own.",
+            checked = systemSpeech,
+        ) { CarSettings.setSystemSpeech(it) }
+
         WebPageSetting()
 
         ScreenFit(vehicle)
@@ -148,7 +155,7 @@ fun CarSettingsScreen() {
             experimentalFeatures,
         ) { CarSettings.setExperimentalFeaturesEnabled(it) }
         if (experimentalFeatures) {
-            ExperimentalFeaturesList(voiceAssistant, carSensors, mediaSearch)
+            ExperimentalFeaturesList(carSensors)
         }
 
         Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
@@ -205,21 +212,11 @@ private fun <T> ChoiceRow(title: String, options: List<Pair<T, String>>, selecte
  * so the list reads fine whether there's one entry or several.
  */
 @Composable
-private fun ExperimentalFeaturesList(voiceAssistant: Boolean, carSensors: Boolean, mediaSearch: Boolean) {
+private fun ExperimentalFeaturesList(carSensors: Boolean) {
     Column(
         Modifier.fillMaxWidth(),
         verticalArrangement = Arrangement.spacedBy(10.dp),
     ) {
-        ExperimentalFeatureRow(
-            title = "Voice assistant",
-            description = "Push-to-talk and the car's voice button start listening: navigate, " +
-                "play media, call, or open an app by saying so. Can mishear you or act on the " +
-                "wrong command - keep your eyes on the road, and confirm anything it does " +
-                "before you rely on it.",
-            warning = true,
-            checked = voiceAssistant,
-        ) { CarSettings.setVoiceAssistantEnabled(it) }
-
         ExperimentalFeatureRow(
             title = "Vehicle data",
             description = "Adds a Vehicle data tile: a live, raw dump of the head unit's sensor " +
@@ -228,13 +225,6 @@ private fun ExperimentalFeaturesList(voiceAssistant: Boolean, carSensors: Boolea
                 "guess, not a fact, until you've watched one change for yourself.",
             checked = carSensors,
         ) { CarSettings.setCarSensorsEnabled(it) }
-
-        ExperimentalFeatureRow(
-            title = "Media search",
-            description = "Adds a search button to the media screen. Some apps ignore the search " +
-                "or play something else.",
-            checked = mediaSearch,
-        ) { CarSettings.setMediaSearchEnabled(it) }
     }
 }
 
@@ -272,7 +262,7 @@ private fun ExperimentalFeatureRow(
     }
 }
 
-/** The URL (or raw HTML) the Web app shows. Edited with [CarKeyboard] - no phone in hand needed. */
+/** The URL (or raw HTML) the Browser app shows. Edited with [CarKeyboard] - no phone in hand needed. */
 @Composable
 private fun WebPageSetting() {
     val context = LocalContext.current
@@ -297,7 +287,7 @@ private fun WebPageSetting() {
             )
         }
         Text(
-            "Shown by the Web app on the launcher. Applies on the next connection.",
+            "Shown by the Browser app on the launcher. Applies on the next connection.",
             style = MaterialTheme.typography.bodySmall,
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )

gearslip/src/main/java/app/seb3thehacker/gearslip/car/CarUi.kt

@@ -256,8 +256,9 @@ fun CarUi() {
                             modifier = Modifier.align(Alignment.TopEnd),
                         )
                         // Above the popup: a call is more urgent than any notification.
+                        VoiceHelpOverlay(Modifier.align(Alignment.Center))
                         CallOverlay(Modifier.align(Alignment.TopCenter))
-                        AssistantOverlay(Modifier.align(Alignment.TopCenter))
+                        AssistantOverlay(Modifier.align(Alignment.BottomCenter))
                         if (app.seb3thehacker.gearslip.BuildConfig.DEBUG) {
                             // Bottom corner, not top: a screen's own header almost always puts
                             // something in the top-right (settings, search, a Liked Songs
@@ -469,12 +470,8 @@ private fun CarNavBar(navigator: CarNavigator) {
                 NavHomeButton(navigator, entries, running)
                 Spacer(Modifier.width(6.dp))
                 NavItem(MediaIcons.Apps, navigator.current == CarScreen.Apps) { navigator.apps() }
-                val experimentalFeatures by CarSettings.experimentalFeaturesEnabled.collectAsState()
-                val voiceEnabled by CarSettings.voiceAssistantEnabled.collectAsState()
-                if (experimentalFeatures && voiceEnabled) {
-                    Spacer(Modifier.width(6.dp))
-                    NavAssistantIcon()
-                }
+                Spacer(Modifier.width(6.dp))
+                NavAssistantIcon()
 
                 // Pinned shortcuts, then whatever else is open right now. A pinned app that's also
                 // open stays in its pinned spot, marked with a dot, instead of showing up twice.

gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaScreen.kt

@@ -61,7 +61,6 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
-import app.seb3thehacker.gearslip.audio.CarAudio
 import app.seb3thehacker.gearslip.media.CarMedia
 import app.seb3thehacker.gearslip.media.MediaApp
 import app.seb3thehacker.gearslip.media.MediaArt
@@ -88,11 +87,9 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
     val queue by media.queue.collectAsStateWithLifecycle()
     val browse by media.browse.collectAsStateWithLifecycle()
     val rejection by media.rejection.collectAsStateWithLifecycle()
-    val capture by CarAudio.capture.collectAsStateWithLifecycle()
     val search by media.search.collectAsStateWithLifecycle()
     var tab by remember { mutableStateOf(Tab.NOW_PLAYING) }
     var searching by remember { mutableStateOf(false) }
-    val searchAllowed = CarSettings.experimentalFeaturesEnabled.collectAsState().value && CarSettings.mediaSearchEnabled.collectAsState().value
 
     // The connection outlives this screen: the home screen's player is the same one.
     LaunchedEffect(app) { CarServices.openMedia(app) }
@@ -174,7 +171,6 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
                 } else {
                     CompactPlayer(now, media, Modifier.weight(1f).fillMaxWidth())
                 }
-                AudioBadge(capture)
             }
             Column(Modifier.weight(1.2f).fillMaxHeight()) {
                 Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
@@ -182,7 +178,7 @@ fun MediaScreen(app: MediaApp, onExit: () -> Unit) {
                     MediaTab("Browse", tab == Tab.BROWSE, Modifier.weight(1f)) { tab = Tab.BROWSE }
                     MediaTab("Up next", tab == Tab.QUEUE, Modifier.weight(1f)) { tab = Tab.QUEUE }
                     MediaTab("Lyrics", tab == Tab.LYRICS, Modifier.weight(1f)) { tab = Tab.LYRICS }
-                    if (searchAllowed && (now.canSearch || media.canSearchLibrary)) {
+                    if (now.canSearch || media.canSearchLibrary) {
                         GsIconButton(
                             Icons.Filled.Search,
                             "Search ${app.label}",
@@ -447,17 +443,6 @@ private sealed interface LyricsState {
     class Found(val result: LyricsResult) : LyricsState
 }
 
-@Composable
-private fun AudioBadge(capture: CarAudio.Capture) {
-    val text = when (capture) {
-        CarAudio.Capture.ON -> "Audio to car"
-        CarAudio.Capture.ASKING -> "Allow audio capture on the phone"
-        CarAudio.Capture.DENIED -> "Audio stays on the phone"
-        CarAudio.Capture.OFF -> return
-    }
-    Text(text, style = MaterialTheme.typography.labelLarge, color = MaterialTheme.colorScheme.onSurfaceVariant)
-}
-
 @Composable
 private fun Notice(title: String, detail: String?, action: Pair<String, () -> Unit>? = null) {
     Column(

gearslip/src/main/java/app/seb3thehacker/gearslip/car/NavApps.kt

@@ -72,7 +72,7 @@ internal class BuiltInApp(
 )
 
 internal object BuiltInApps {
-    val Web = BuiltInApp("web", "Web", Icons.Filled.Search, CarScreen.App("web")) { it.open("web") }
+    val Web = BuiltInApp("web", "Browser", Icons.Filled.Search, CarScreen.App("web")) { it.open("web") }
     val ScreenSharing = BuiltInApp("phone", "Screen sharing", Icons.Filled.Share, CarScreen.App("phone")) { it.open("phone") }
     val Phone = BuiltInApp("dialer", "Phone", Icons.Filled.Call, CarScreen.App("dialer")) { it.open("dialer") }
     val VehicleData = BuiltInApp("vehicle", "Vehicle data", Icons.Filled.Info, CarScreen.VehicleData) { it.vehicleData() }

gearslip/src/main/java/app/seb3thehacker/gearslip/car/TemplateContent.kt

@@ -45,6 +45,7 @@ import androidx.car.app.model.MessageTemplate
 import androidx.car.app.model.PaneTemplate
 import androidx.car.app.model.Row as CarRow
 import androidx.car.app.model.SearchTemplate
+import androidx.compose.foundation.clickable
 import androidx.car.app.model.Section
 import androidx.car.app.model.SectionedItemTemplate
 import androidx.car.app.model.TabTemplate
@@ -238,6 +239,9 @@ private fun SearchContent(template: SearchTemplate, modifier: Modifier) {
     // initialSearchText would fight whatever is being typed.
     var query by remember { mutableStateOf(template.initialSearchText.orEmpty()) }
     val delegate = template.searchCallbackDelegate
+    // An app that opens on results ("navigate to Starbucks") asks for the keyboard to stay down,
+    // so the results aren't hidden under it. Tapping the field brings it up.
+    var typing by remember { mutableStateOf(template.isShowKeyboardByDefault) }
 
     ContentSurface(modifier) {
         // Back button and field share a row: on a 480px screen the keyboard and the results
@@ -251,7 +255,7 @@ private fun SearchContent(template: SearchTemplate, modifier: Modifier) {
             SearchField(
                 query,
                 template.searchHint.orEmpty(),
-                Modifier.weight(1f),
+                Modifier.weight(1f).clickable { typing = true },
                 onClear = {
                     query = ""
                     delegate.textChanged("")
@@ -265,14 +269,17 @@ private fun SearchContent(template: SearchTemplate, modifier: Modifier) {
             else ItemListColumn(template.itemList, modifier = Modifier.fillMaxSize())
         }
 
-        CarKeyboard(
-            text = query,
-            onTextChange = {
-                query = it
-                delegate.textChanged(it)
-            },
-            onSubmit = { delegate.submitted(query) },
-        )
+        if (typing) {
+            CarKeyboard(
+                text = query,
+                onTextChange = {
+                    query = it
+                    delegate.textChanged(it)
+                },
+                onSubmit = { delegate.submitted(query) },
+                onDismiss = { typing = false },
+            )
+        }
     }
 }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/car/VoiceHelpOverlay.kt

@@ -0,0 +1,94 @@
+package app.seb3thehacker.gearslip.car
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import app.seb3thehacker.gearslip.car.theme.GsIconButton
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+/** What the assistant understands, shown on the car screen when the driver says "help". */
+object VoiceHelp {
+    private val _shown = MutableStateFlow(false)
+    val shown: StateFlow<Boolean> = _shown.asStateFlow()
+
+    fun show() { _shown.value = true }
+    fun hide() { _shown.value = false }
+
+    /** Say this, and this happens. Kept in step with [AssistantCommands]. */
+    val COMMANDS = listOf(
+        "Navigate to…" to "Directions there. Add \"with Organic Maps\" to pick the app",
+        "Play…" to "A song, artist, or album in the open music app",
+        "Pause · Resume · Next · Previous" to "Control the music",
+        "What's playing" to "The song and artist",
+        "Call…" to "A contact by name",
+        "Open…" to "Any app, like Browser, Phone, or Screen sharing",
+        "Exit" to "Back to the car's own screen",
+        "Go home · Open apps · Settings" to "Move around Gearslip",
+        "What time is it · Weather" to "The time, or the forecast",
+        "Help" to "This list",
+    )
+}
+
+/** The command list over the car screen: read it at a glance, tap the cross or wait to dismiss. */
+@Composable
+fun VoiceHelpOverlay(modifier: Modifier = Modifier) {
+    val shown by VoiceHelp.shown.collectAsState()
+    if (!shown) return
+    // A list left up would cover the map for the rest of the drive.
+    LaunchedEffect(Unit) {
+        delay(30_000)
+        VoiceHelp.hide()
+    }
+    Surface(
+        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+        contentColor = MaterialTheme.colorScheme.onSurface,
+        shape = MaterialTheme.shapes.extraLarge,
+        tonalElevation = 6.dp,
+        shadowElevation = 8.dp,
+        modifier = modifier.padding(16.dp).widthIn(max = 640.dp),
+    ) {
+        Column(Modifier.padding(20.dp)) {
+            Row(Modifier.fillMaxWidth()) {
+                Text(
+                    "You can say",
+                    style = MaterialTheme.typography.titleLarge,
+                    fontWeight = FontWeight.Bold,
+                    modifier = Modifier.weight(1f).padding(top = 6.dp),
+                )
+                GsIconButton(Icons.Filled.Close, "Close", VoiceHelp::hide)
+            }
+            // Full width, so a drag anywhere on the card scrolls, not just one on the words.
+            Column(
+                Modifier.fillMaxWidth().verticalScroll(rememberScrollState()).padding(top = 8.dp),
+                verticalArrangement = Arrangement.spacedBy(10.dp),
+            ) {
+                VoiceHelp.COMMANDS.forEach { (say, does) ->
+                    Column(Modifier.fillMaxWidth()) {
+                        Text(say, style = MaterialTheme.typography.titleMedium, fontWeight = FontWeight.SemiBold)
+                        Text(does, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                    }
+                }
+            }
+        }
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/car/WebApp.kt

@@ -59,7 +59,7 @@ fun WebApp(content: String) {
 
     Column(Modifier.fillMaxSize()) {
         // Back steps through the page's history first (the interceptor above), then leaves.
-        ScreenHeader("Web", Modifier.padding(horizontal = 16.dp, vertical = 8.dp))
+        ScreenHeader("Browser", Modifier.padding(horizontal = 16.dp, vertical = 8.dp))
         AndroidView(
             modifier = Modifier.weight(1f).fillMaxSize(),
             factory = { context ->

gearslip/src/main/java/app/seb3thehacker/gearslip/host/CarAppConnection.kt

@@ -301,11 +301,14 @@ class CarAppConnection(private val context: Context) {
     /**
      * "navigate to X" deep link, the same one Android Auto's own Assistant integration sends -
      * [ACTION_NAVIGATE] with the destination as a `geo:` search query, rather than anything
-     * app-specific.
+     * app-specific. Centred on the phone when there's a fix: `geo:0,0` made Organic Maps pick the
+     * first Del Taco it found anywhere, not the nearest. The location goes only to the map app.
      */
-    private fun navigateIntent(destination: String) =
-        Intent(CarContext.ACTION_NAVIGATE, Uri.parse("geo:0,0?q=" + Uri.encode(destination)))
+    private fun navigateIntent(destination: String): Intent {
+        val near = app.seb3thehacker.gearslip.notify.CarMotion.nearHere(context) ?: "0,0"
+        return Intent(CarContext.ACTION_NAVIGATE, Uri.parse("geo:$near?q=" + Uri.encode(destination)))
             .setComponent(component)
+    }
 
     /**
      * Sends a fresh destination to an app that's already running, instead of tearing it down

gearslip/src/main/java/app/seb3thehacker/gearslip/media/CarMedia.kt

@@ -156,6 +156,9 @@ class CarMedia(private val context: Context) {
     private val main = Handler(Looper.getMainLooper())
     private var connecting: MediaApp? = null
 
+    /** The music app Gearslip is attached to, for the assistant to name; null when there's none. */
+    val appLabel: String? get() = connecting?.label?.takeIf { controller != null }
+
     private val _phase = MutableStateFlow(Phase.IDLE)
     val phase: StateFlow<Phase> = _phase.asStateFlow()
 
@@ -236,6 +239,12 @@ class CarMedia(private val context: Context) {
         connecting = app
         _phase.value = Phase.CONNECTING
         _browse.value = BrowseState()
+        // Known to refuse its library (Spotify): asking only costs the seconds it takes to say no,
+        // so go straight to its playback session.
+        if (KnownApps.playerWorks(app.component.packageName)) {
+            attachToSession(app)
+            return
+        }
         val mb = MediaBrowser(context, app.component, object : MediaBrowser.ConnectionCallback() {
             override fun onConnected() = this@CarMedia.onConnected(app)
             override fun onConnectionFailed() {
@@ -273,7 +282,12 @@ class CarMedia(private val context: Context) {
             return
         }
         if (session == null) {
-            val limit = if (launched) SESSION_RETRIES_LAUNCHED else SESSION_RETRIES
+            // A known session-only app that isn't running won't start by waiting: say so at once.
+            val limit = when {
+                launched -> SESSION_RETRIES_LAUNCHED
+                KnownApps.playerWorks(app.component.packageName) -> 0
+                else -> SESSION_RETRIES
+            }
             // The app only publishes its session once its service has started; give it a moment.
             if (attempt < limit) {
                 main.postDelayed({ attachToSession(app, attempt + 1, launched) }, SESSION_RETRY_MS)
@@ -454,7 +468,7 @@ class CarMedia(private val context: Context) {
         }
         val component = searchComponent
         if (component == null) {
-            _results.value = Results(q, emptyList(), supported = false)
+            noLibrarySearch(q)
             return
         }
         resultsQuery = q
@@ -476,13 +490,13 @@ class CarMedia(private val context: Context) {
             override fun onConnectionFailed() {
                 GearslipLog.w("media: no library connection for search")
                 searchBrowser = null
-                resultsQuery?.let { _results.value = Results(it, emptyList(), supported = false) }
+                resultsQuery?.let { noLibrarySearch(it) }
             }
         }, null)
         searchBrowser = created
         runCatching { created.connect() }.onFailure {
             searchBrowser = null
-            _results.value = Results(q, emptyList(), supported = false)
+            noLibrarySearch(q)
         }
     }
 
@@ -492,18 +506,42 @@ class CarMedia(private val context: Context) {
                 override fun onSearchResult(query: String, extras: Bundle?, items: List<MediaBrowserCompat.MediaItem>) {
                     if (query != resultsQuery) return
                     GearslipLog.i("media: library search found ${items.size}")
-                    _results.value = Results(query, items.map(::entryOfCompat))
+                    val entries = items.map(::entryOfCompat)
+                    if (query == playFirstFor) {
+                        playFirstFor = null
+                        val first = entries.firstOrNull { it.playable } ?: entries.firstOrNull()
+                        if (first == null) {
+                            clearResults()
+                            search(query)
+                        } else {
+                            GearslipLog.i("media: playing the library's best match")
+                            clearResults()
+                            searchBefore = _now.value
+                            _search.value = Search(query)
+                            main.removeCallbacks(searchTimeout)
+                            controller?.transportControls?.playFromMediaId(first.id, null)
+                            main.postDelayed(searchTimeout, SEARCH_WAIT_MS)
+                        }
+                        return
+                    }
+                    _results.value = Results(query, entries)
                 }
 
                 override fun onError(query: String, extras: Bundle?) {
                     if (query != resultsQuery) return
+                    if (query == playFirstFor) {
+                        playFirstFor = null
+                        clearResults()
+                        search(query)
+                        return
+                    }
                     GearslipLog.i("media: the app has no library search")
                     _results.value = Results(query, emptyList(), supported = false)
                 }
             })
         }.onFailure {
             GearslipLog.w("media: library search failed: ${it.message}")
-            _results.value = Results(q, emptyList(), supported = false)
+            noLibrarySearch(q)
         }
     }
 
@@ -520,6 +558,36 @@ class CarMedia(private val context: Context) {
         )
     }
 
+    /** The library can't search: a voice "play X" falls back to the app's own search; a typed one says so. */
+    private fun noLibrarySearch(q: String) {
+        if (q == playFirstFor) {
+            playFirstFor = null
+            clearResults()
+            search(q)
+        } else {
+            _results.value = Results(q, emptyList(), supported = false)
+        }
+    }
+
+    /** A voice "play X" waiting on the library search, to play its first match instead of listing them. */
+    private var playFirstFor: String? = null
+
+    /**
+     * Plays the best match for [query], for voice. Asks the app's library first and plays its top
+     * result, which apps like ViVi honour where they ignore [search]; without a library search,
+     * falls back to [search].
+     */
+    fun playBestMatch(query: String) {
+        val q = query.trim()
+        if (q.isEmpty()) return
+        if (!canSearchLibrary) {
+            search(q)
+            return
+        }
+        playFirstFor = q
+        searchLibrary(q)
+    }
+
     /** The connected app's service, for the search connection; null when nothing is connected. */
     private var searchComponent: android.content.ComponentName? = null
     private var searchBrowser: MediaBrowserCompat? = null

gearslip/src/main/java/app/seb3thehacker/gearslip/notify/CarMotion.kt

@@ -22,6 +22,33 @@ object CarMotion {
     private var listener: LocationListener? = null
     private var speed = 0f
     private var fixAt = 0L
+    @Volatile private var last: Location? = null
+
+    /** A fix older than this is somewhere the car has left. */
+    private const val NEAR_STALE_MS = 10 * 60_000L
+
+    /**
+     * Where the phone is, as "lat,lng", for "navigate to Del Taco" to find the nearest one. From
+     * this drive's GPS, or Android's last known fix; null with no permission or nothing recent.
+     */
+    fun nearHere(context: Context): String? {
+        val fix = last?.takeIf { SystemClock.elapsedRealtime() - fixAt < NEAR_STALE_MS }
+            ?: lastKnown(context)
+            ?: return null
+        return String.format(java.util.Locale.US, "%.5f,%.5f", fix.latitude, fix.longitude)
+    }
+
+    private fun lastKnown(context: Context): Location? {
+        if (context.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
+            context.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
+        ) return null
+        val manager = context.getSystemService(LocationManager::class.java) ?: return null
+        val now = System.currentTimeMillis()
+        return manager.getProviders(true)
+            .mapNotNull { runCatching { manager.getLastKnownLocation(it) }.getOrNull() }
+            .filter { now - it.time < NEAR_STALE_MS }
+            .maxByOrNull { it.time }
+    }
 
     val moving: Boolean
         get() = SystemClock.elapsedRealtime() - fixAt < STALE_MS && speed > MOVING_MS
@@ -34,6 +61,7 @@ object CarMotion {
             override fun onLocationChanged(location: Location) {
                 speed = if (location.hasSpeed()) location.speed else 0f
                 fixAt = SystemClock.elapsedRealtime()
+                last = location
             }
         }
         listener = l

gearslip/src/main/java/app/seb3thehacker/gearslip/speech/SpeechEngine.kt

@@ -4,7 +4,6 @@ import android.Manifest
 import android.annotation.SuppressLint
 import android.content.Context
 import android.content.pm.PackageManager
-import android.content.res.AssetManager
 import android.media.AudioFormat
 import android.media.AudioManager
 import android.media.AudioRecord
@@ -15,38 +14,50 @@ import android.os.Looper
 import android.os.SystemClock
 import app.seb3thehacker.gearslip.GearslipLog
 import app.seb3thehacker.gearslip.audio.CarMic
-import java.util.Locale
+import com.k2fsa.sherpa.onnx.EndpointConfig
+import com.k2fsa.sherpa.onnx.EndpointRule
+import com.k2fsa.sherpa.onnx.FeatureConfig
+import com.k2fsa.sherpa.onnx.OfflineCanaryModelConfig
+import com.k2fsa.sherpa.onnx.OfflineModelConfig
+import com.k2fsa.sherpa.onnx.OfflineRecognizer
+import com.k2fsa.sherpa.onnx.OfflineRecognizerConfig
+import com.k2fsa.sherpa.onnx.OfflineTransducerModelConfig
+import com.k2fsa.sherpa.onnx.OnlineModelConfig
+import com.k2fsa.sherpa.onnx.OnlineRecognizer
+import com.k2fsa.sherpa.onnx.OnlineRecognizerConfig
+import com.k2fsa.sherpa.onnx.OnlineTransducerModelConfig
+import java.io.File
 import java.util.concurrent.Executors
-import kotlin.math.log10
 import kotlin.math.max
-import kotlin.math.sqrt
 
 /**
  * Gearslip's own speech-to-text, so voice works on phones with no speech service (GrapheneOS ships
- * none). whisper.cpp runs FUTO's ACFT Whisper model, which are tuned for short phrases: a reply
- * of a few seconds comes back in well under a second on a recent phone.
+ * none). sherpa-onnx runs a streaming model ([SpeechModels]) on the phone: words come out while
+ * the driver is still talking, and the model itself decides when they've finished. A larger model
+ * then reads the whole phrase once more for the final words, since a model that waits for the end
+ * hears names and places far better than one that has to keep up. The phrase is held in memory
+ * for that and nowhere else, and dropped as soon as it's read.
  *
- * Whisper needs the whole phrase before it starts, so this records from the car's microphone (the
- * phone's when the car has none or sends nothing),
- * decides when the driver has stopped talking (a stretch of quiet after speech), then transcribes
- * once. Everything runs on one worker thread; callbacks arrive on the main thread.
+ * Audio comes from the car's microphone, or the phone's when the car has none or sends nothing.
+ * Everything runs on one worker thread; callbacks arrive on the main thread.
  */
 object SpeechEngine {
 
-    /** FUTO's ACFT Whisper tiny (Apache-2.0), re-quantized to 5 bits, inside the APK. */
-    private const val MODEL = "speech/tiny_acft_q5_1.bin"
-
     /** The error for an engine that can't run at all, which callers may answer with a fallback. */
     const val NOT_LOADED = "The speech model didn't load."
 
+    /** Said when the chosen model hasn't been downloaded yet. */
+    const val NOT_DOWNLOADED = "Download a voice model in Gearslip's settings on the phone first."
+
     private const val RATE = 16_000
-    private const val FRAME = 480 // 30 ms
-    private const val MAX_MS = 15_000L
-    private const val NO_SPEECH_MS = 6_000L
-    private const val END_SILENCE_MS = 1_100L
-    private const val CALIBRATE_MS = 300L
-    private const val PRE_ROLL = RATE * 3 / 10 // keep 300 ms before the first word
+    private const val CHUNK = 1_600 // 100 ms
+    private const val MAX_S = 15f
+    /** Quiet before the first word that counts as "nobody spoke". */
+    private const val NO_SPEECH_S = 6f
+    /** Quiet after the last word that ends the phrase. */
+    private const val END_SILENCE_S = 1.0f
     private const val CUE_VOLUME = 80
+    private const val IDLE_UNLOAD_MS = 5 * 60_000L
     /** How long the car gets to start sending once asked, before the phone's microphone takes over. */
     private const val CAR_FIRST_AUDIO_MS = 1_500L
     private const val CAR_GAP_MS = 1_000L
@@ -55,27 +66,79 @@ object SpeechEngine {
     private const val CUE_TAIL_MS = 250L
 
     private val worker = Executors.newSingleThreadExecutor { Thread(it, "gearslip-speech") }
+    /**
+     * Parakeet large takes seconds to load. On [worker], the first press after connecting
+     * waited behind it before listening at all; here it loads while the driver talks.
+     */
+    private val finalWorker = Executors.newSingleThreadExecutor { Thread(it, "gearslip-speech-final") }
+    private val finalLock = Object()
     private val main = Handler(Looper.getMainLooper())
 
-    private var libraryLoaded = false
-    private var handle = 0L
+    private var recognizer: OnlineRecognizer? = null
+    private var loadedModel: SpeechModels.Model? = null
+    @Volatile private var finalRecognizer: OfflineRecognizer? = null
+    @Volatile private var loadedFinal: SpeechModels.Model? = null
+
+    /**
+     * Parakeet large holds most of the ~900 MB the two models take, so it goes after a few
+     * minutes without a command. Kroko stays: it's small, and keeps listening instant.
+     */
+    private val idleUnload = Runnable { unloadFinal("after ${IDLE_UNLOAD_MS / 60_000} minutes without use") }
     @Volatile private var run = 0
 
-    /** Loads the model ahead of time, so the first reply doesn't wait for it. */
+    /** Loads the model ahead of time, so the first command doesn't wait for it. */
     fun warm(context: Context) {
         val app = context.applicationContext
-        worker.execute { ensureLoaded(app) }
+        SpeechModels.init(app)
+        // Kroko first, alone: loading both at once slowed it from a fraction of a second to six.
+        worker.execute {
+            ensureLoaded(app)
+            finalWorker.execute { ensureFinalLoaded(app) }
+        }
+    }
+
+    private fun unloadFinal(why: String) {
+        finalWorker.execute {
+            synchronized(finalLock) {
+                val model = loadedFinal ?: return@execute
+                finalRecognizer?.release()
+                finalRecognizer = null
+                loadedFinal = null
+                GearslipLog.i("speech: unloaded ${model.label} $why")
+            }
+        }
+    }
+
+    /** Drops the loaded models: the driver picked another or deleted one, or the car went away. */
+    fun unload() {
+        main.removeCallbacks(idleUnload)
+        run++
+        worker.execute {
+            recognizer?.release()
+            recognizer = null
+            loadedModel = null
+        }
+        finalWorker.execute {
+            synchronized(finalLock) {
+                finalRecognizer?.release()
+                finalRecognizer = null
+                loadedFinal = null
+            }
+        }
     }
 
     /**
      * Listens for one phrase. [cue] plays a short tone first, so the driver knows when to talk.
-     * [onSpeaking] fires at the first word, [onHeard] when the driver stops and the words are being
-     * worked out; [onResult] gets the text, [onError] a sentence fit to show on the car screen.
+     * [onPartial] gets the words so far as they're recognized, [onSpeaking] fires at the first
+     * word, [onHeard] when the driver stops; [onResult] gets the text, [onError] a sentence fit to
+     * show on the car screen.
      */
     fun listen(
         context: Context,
         cue: Boolean = true,
         onSpeaking: () -> Unit = {},
+        onPartial: (String) -> Unit = {},
+        onListening: () -> Unit = {},
         onHeard: () -> Unit,
         onResult: (String) -> Unit,
         onError: (String) -> Unit,
@@ -87,28 +150,29 @@ object SpeechEngine {
         }
         val id = ++run
         fun post(block: () -> Unit) { main.post { if (id == run) block() } }
+        // Brings Parakeet back if it was unloaded, while the driver talks.
+        main.removeCallbacks(idleUnload)
+        finalWorker.execute { ensureFinalLoaded(app) }
         worker.execute {
             if (id != run) return@execute
-            if (!ensureLoaded(app)) return@execute post { onError(NOT_LOADED) }
+            if (!SpeechModels.isReady(app, SpeechModels.selected.value)) return@execute post { onError(NOT_DOWNLOADED) }
+            val r = ensureLoaded(app) ?: return@execute post { onError(NOT_LOADED) }
             VoiceFocus.acquire(app)
-            val audio = try {
+            val text = try {
                 if (cue) cue()
                 if (id != run) return@execute
-                record(id) { post(onSpeaking) }
+                post(onListening)
+                stream(app, r, id, onSpeaking = { post(onSpeaking) }, onPartial = { post { onPartial(it) } }, onStopped = { post(onHeard) })
             } catch (t: Throwable) {
-                GearslipLog.e("speech: recording failed", t)
+                GearslipLog.e("speech: listening failed", t)
                 return@execute post { onError("The microphone isn't available right now.") }
             } finally {
                 VoiceFocus.release()
             }
+            main.removeCallbacks(idleUnload)
+            main.postDelayed(idleUnload, IDLE_UNLOAD_MS)
             if (id != run) return@execute
-            if (audio == null) return@execute post { onError("Didn't catch that.") }
             post(onHeard)
-            val started = SystemClock.uptimeMillis()
-            val text = clean(transcribe(audio))
-            GearslipLog.i(
-                "speech: ${audio.size * 1000L / RATE} ms of audio took ${SystemClock.uptimeMillis() - started} ms",
-            )
             post { if (text.isEmpty()) onError("Didn't catch that.") else onResult(text) }
         }
     }
@@ -116,6 +180,185 @@ object SpeechEngine {
     /** Stops listening; a phrase already being worked out is dropped. */
     fun cancel() { run++ }
 
+    /**
+     * Feeds the microphone to the recognizer in 100 ms pieces, reporting the words as they firm
+     * up, until the model hears the end of the phrase (or nobody speaks, or it runs too long).
+     */
+    private fun stream(
+        context: Context,
+        r: OnlineRecognizer,
+        id: Int,
+        onSpeaking: () -> Unit,
+        onPartial: (String) -> Unit,
+        onStopped: () -> Unit,
+    ): String {
+        val mic = carMic() ?: phoneMic()
+        val s = r.createStream()
+        val frame = ShortArray(CHUNK)
+        val samples = FloatArray(CHUNK)
+        // The whole phrase, for the final read; [MAX_S] and a little over is the most it can hold.
+        val phrase = FloatArray((RATE * (MAX_S + 1)).toInt())
+        var held = 0
+        var last = ""
+        var spoke = false
+        var audioMs = 0L
+        var decodeMs = 0L
+        try {
+            while (id == run) {
+                val n = mic.read(frame)
+                if (n < 0) break
+                if (n == 0) continue
+                for (i in 0 until n) samples[i] = frame[i] / 32768f
+                val keep = minOf(n, phrase.size - held)
+                System.arraycopy(samples, 0, phrase, held, keep)
+                held += keep
+                s.acceptWaveform(if (n == CHUNK) samples else samples.copyOf(n), RATE)
+                audioMs += n * 1000L / RATE
+                val started = SystemClock.uptimeMillis()
+                while (r.isReady(s)) r.decode(s)
+                decodeMs += SystemClock.uptimeMillis() - started
+                val text = clean(r.getResult(s).text)
+                if (text != last) {
+                    last = text
+                    if (text.isNotEmpty() && !spoke) {
+                        spoke = true
+                        onSpeaking()
+                    }
+                    onPartial(text)
+                }
+                if (r.isEndpoint(s)) break
+            }
+            s.inputFinished()
+            while (r.isReady(s)) r.decode(s)
+            last = clean(r.getResult(s).text)
+        } finally {
+            mic.close()
+            s.release()
+        }
+        // Under 1.0 keeps up with the driver; over it, the words fall behind the voice.
+        GearslipLog.i(
+            "speech: $audioMs ms of audio, decoding took $decodeMs ms " +
+                "(${"%.2f".format(decodeMs.toFloat() / max(1L, audioMs))} of real time)",
+        )
+        if (last.isEmpty() || id != run) { phrase.fill(0f); return last }
+        // Still loading (just connected, or back after going idle): the live words now beat
+        // Parakeet's in several seconds.
+        val wanted = SpeechModels.final.value
+        if (wanted == null || finalRecognizer == null || loadedFinal != wanted) {
+            if (wanted != null) GearslipLog.i("speech: ${wanted.label} isn't loaded yet, keeping the live words")
+            phrase.fill(0f)
+            return last
+        }
+        onStopped()
+        val started = SystemClock.uptimeMillis()
+        // Held for the whole read, so a model swap or the idle unload can't free it mid-decode.
+        val reread = synchronized(finalLock) {
+            val final = finalRecognizer?.takeIf { loadedFinal == wanted } ?: run { phrase.fill(0f); return last }
+            final.createStream().run {
+                try {
+                    acceptWaveform(phrase.copyOf(held), RATE)
+                    final.decode(this)
+                    clean(final.getResult(this).text)
+                } finally {
+                    release()
+                }
+            }
+        }
+        phrase.fill(0f)
+        GearslipLog.i("speech: the final read took ${SystemClock.uptimeMillis() - started} ms")
+        if (reread.isEmpty()) return last
+        if (reread != last) onPartial(reread)
+        return reread
+    }
+
+    /** The model that rereads the phrase, when one is chosen and downloaded; null otherwise. */
+    private fun ensureFinalLoaded(context: Context): OfflineRecognizer? = synchronized(finalLock) {
+        val model = SpeechModels.final.value ?: return null
+        if (finalRecognizer != null && loadedFinal == model) return finalRecognizer
+        finalRecognizer?.release()
+        finalRecognizer = null
+        if (!SpeechModels.isReady(context, model)) return null
+        val dir = SpeechModels.dir(context, model)
+        fun path(name: String) = File(dir, name).absolutePath
+        val started = SystemClock.uptimeMillis()
+        return runCatching {
+            OfflineRecognizer(
+                config = OfflineRecognizerConfig(
+                    featConfig = FeatureConfig(sampleRate = RATE, featureDim = 80),
+                    modelConfig = if (model.modelType == "canary") {
+                        // English in, English out, and no punctuation: clean() strips it anyway.
+                        OfflineModelConfig(
+                            canary = OfflineCanaryModelConfig(path(model.encoder), path(model.decoder), srcLang = "en", tgtLang = "en", usePnc = false),
+                            tokens = path("tokens.txt"),
+                            numThreads = threads(),
+                        )
+                    } else {
+                        OfflineModelConfig(
+                            transducer = OfflineTransducerModelConfig(path(model.encoder), path(model.decoder), path(model.joiner)),
+                            tokens = path("tokens.txt"),
+                            numThreads = threads(),
+                            modelType = model.modelType,
+                        )
+                    },
+                    decodingMethod = "greedy_search",
+                ),
+            )
+        }.onSuccess {
+            finalRecognizer = it
+            loadedFinal = model
+            GearslipLog.i("speech: loaded ${model.label} in ${SystemClock.uptimeMillis() - started} ms")
+        }.onFailure {
+            GearslipLog.e("speech: couldn't load ${model.label}", it)
+        }.getOrNull()
+    }
+
+    private fun ensureLoaded(context: Context): OnlineRecognizer? {
+        val model = SpeechModels.selected.value
+        if (recognizer != null && loadedModel == model) return recognizer
+        recognizer?.release()
+        recognizer = null
+        if (!SpeechModels.isReady(context, model)) return null
+        val dir = SpeechModels.dir(context, model)
+        fun path(name: String) = File(dir, name).absolutePath
+        val started = SystemClock.uptimeMillis()
+        return runCatching {
+            OnlineRecognizer(
+                config = OnlineRecognizerConfig(
+                    featConfig = FeatureConfig(sampleRate = RATE, featureDim = 80),
+                    modelConfig = OnlineModelConfig(
+                        transducer = OnlineTransducerModelConfig(path(model.encoder), path(model.decoder), path(model.joiner)),
+                        tokens = path("tokens.txt"),
+                        numThreads = threads(),
+                        modelType = model.modelType,
+                    ),
+                    endpointConfig = EndpointConfig(
+                        rule1 = EndpointRule(false, NO_SPEECH_S, 0f),
+                        rule2 = EndpointRule(true, END_SILENCE_S, 0f),
+                        rule3 = EndpointRule(false, 0f, MAX_S),
+                    ),
+                    enableEndpoint = true,
+                    decodingMethod = "greedy_search",
+                ),
+            )
+        }.onSuccess {
+            recognizer = it
+            loadedModel = model
+            GearslipLog.i("speech: loaded ${model.label} in ${SystemClock.uptimeMillis() - started} ms")
+        }.onFailure {
+            GearslipLog.e("speech: couldn't load ${model.label}", it)
+        }.getOrNull()
+    }
+
+    /** The big cores only: more threads than that slow the model down on a phone. */
+    private fun threads() = Runtime.getRuntime().availableProcessors().let { if (it >= 8) 4 else max(1, it / 2) }
+
+    /**
+     * Models write in upper case, or with punctuation and capitals of their own; commands are
+     * matched in plain lower case, so only words and apostrophes are kept.
+     */
+    private fun clean(text: String): String =
+        text.lowercase().replace(Regex("[^\\p{L}\\p{N}' ]"), " ").replace(Regex("\\s+"), " ").trim()
+
     /**
      * A short beep on the media stream, so it plays through the car like everything else, then a
      * pause long enough for it to finish there before the microphone opens and hears it.
@@ -130,14 +373,9 @@ object SpeechEngine {
         }
     }
 
-    // --- recording --------------------------------------------------------------------------
+    // --- microphones -----------------------------------------------------------------------
 
-    /**
-     * Records until the driver stops talking. Returns the phrase from just before the first word,
-     * or null when nobody spoke. The speech threshold follows the noise in the first 300 ms, so a
-     * loud cabin needs a louder voice than a quiet one to count as talking.
-     */
-    /** Where a phrase is recorded from: [read] fills [frame] and returns how many samples it got. */
+    /** Where a phrase is heard from: [read] fills [frame] and returns how many samples it got, -1 at the end. */
     private interface Mic {
         fun read(frame: ShortArray): Int
         fun close()
@@ -148,10 +386,11 @@ object SpeechEngine {
         val min = AudioRecord.getMinBufferSize(RATE, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT)
         val recorder = AudioRecord(
             MediaRecorder.AudioSource.VOICE_RECOGNITION, RATE,
-            AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, max(min, FRAME * 8),
+            AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, max(min, CHUNK * 4),
         )
         check(recorder.state == AudioRecord.STATE_INITIALIZED) { "AudioRecord didn't initialize" }
         recorder.startRecording()
+        GearslipLog.i("speech: listening through the phone's microphone")
         return object : Mic {
             override fun read(frame: ShortArray) = recorder.read(frame, 0, frame.size)
             override fun close() {
@@ -163,7 +402,7 @@ object SpeechEngine {
 
     /**
      * The car's microphone, which hears the driver better than a phone in a cup holder. The car
-     * sends audio in its own sized pieces; they're cut to [FRAME]s here. Null when there's no car
+     * sends audio in its own sized pieces; they're cut to [CHUNK]s here. Null when there's no car
      * microphone, or it sends nothing at first, so the phone's is used instead.
      */
     private fun carMic(): Mic? {
@@ -190,105 +429,10 @@ object SpeechEngine {
                     at += n
                     if (at == chunk.size) { pending = null; at = 0 }
                 }
-                // The car stopped sending mid-phrase: end the recording rather than wait forever.
+                // The car stopped sending mid-phrase: end the phrase rather than wait forever.
                 return if (filled == 0) -1 else filled
             }
             override fun close() = car.stop()
         }
     }
-
-    /**
-     * Records until the driver stops talking. Returns the phrase from just before the first word,
-     * or null when nobody spoke. The speech threshold follows the noise in the first 300 ms, so a
-     * loud cabin needs a louder voice than a quiet one to count as talking.
-     */
-    private fun record(id: Int, onSpeaking: () -> Unit): FloatArray? {
-        val mic = carMic() ?: phoneMic()
-        val samples = FloatArray((RATE * MAX_MS / 1000).toInt())
-        var count = 0
-        val frame = ShortArray(FRAME)
-        var noise = 0.0
-        var noiseFrames = 0
-        var speechStart = -1
-        var lastSpeech = 0
-        try {
-            while (id == run && count + FRAME <= samples.size) {
-                val n = mic.read(frame)
-                if (n < 0) break
-                if (n == 0) continue
-                var sum = 0.0
-                for (i in 0 until n) {
-                    val v = frame[i] / 32768f
-                    samples[count + i] = v
-                    sum += v * v
-                }
-                count += n
-                val db = 20 * log10(sqrt(sum / n) + 1e-9)
-                val ms = count * 1000L / RATE
-                if (ms <= CALIBRATE_MS) {
-                    noise += db; noiseFrames++
-                    continue
-                }
-                val floor = if (noiseFrames > 0) noise / noiseFrames else -60.0
-                val talking = db > max(floor + 12, -45.0)
-                if (talking) {
-                    if (speechStart < 0) {
-                        speechStart = max(0, count - n - PRE_ROLL)
-                        onSpeaking()
-                    }
-                    lastSpeech = count
-                }
-                if (speechStart < 0 && ms > NO_SPEECH_MS) return null
-                if (speechStart >= 0 && (count - lastSpeech) * 1000L / RATE > END_SILENCE_MS) break
-            }
-        } finally {
-            mic.close()
-        }
-        if (speechStart < 0) return null
-        return samples.copyOfRange(speechStart, count)
-    }
-
-    // --- the model --------------------------------------------------------------------------
-
-    private fun ensureLoaded(context: Context): Boolean {
-        if (handle != 0L) return true
-        if (!libraryLoaded) {
-            runCatching { System.loadLibrary("gearslip_speech") }
-                .onFailure { GearslipLog.e("speech: native library missing", it); return false }
-            libraryLoaded = true
-        }
-        val started = SystemClock.uptimeMillis()
-        handle = nativeInitAsset(context.assets, MODEL)
-        if (handle == 0L) {
-            GearslipLog.w("speech: couldn't load the model")
-            return false
-        }
-        GearslipLog.i("speech: loaded the model in ${SystemClock.uptimeMillis() - started} ms")
-        return true
-    }
-
-    private fun transcribe(audio: FloatArray): String {
-        val bytes = nativeTranscribe(handle, audio, language(), threads())
-        return String(bytes, Charsets.UTF_8)
-    }
-
-    /** The phone's language, as Whisper names it. Older Java codes differ for a few. */
-    private fun language(): String = when (val lang = Locale.getDefault().language) {
-        "iw" -> "he"
-        "in" -> "id"
-        "ji" -> "yi"
-        "" -> "en"
-        else -> lang
-    }
-
-    /** The big cores only: more threads than that slow Whisper down on a phone. */
-    private fun threads() = Runtime.getRuntime().availableProcessors().coerceIn(1, 8).let { if (it >= 8) 4 else max(1, it / 2) }
-
-    /** Whisper marks silence and noise as "[BLANK_AUDIO]" or "(wind blowing)"; none of it is words. */
-    private fun clean(text: String): String =
-        text.replace(Regex("""\[[^\]]*\]|\([^)]*\)|\*[^*]*\*"""), " ").replace(Regex("\\s+"), " ").trim()
-
-    private external fun nativeInitAsset(assets: AssetManager, path: String): Long
-    private external fun nativeTranscribe(handle: Long, samples: FloatArray, language: String, threads: Int): ByteArray
-    private external fun nativeFree(handle: Long)
 }

gearslip/src/main/java/app/seb3thehacker/gearslip/speech/SpeechModels.kt

@@ -0,0 +1,193 @@
+package app.seb3thehacker.gearslip.speech
+
+import android.content.Context
+import app.seb3thehacker.gearslip.GearslipLog
+import java.io.File
+import java.net.HttpURLConnection
+import java.net.URL
+import java.util.concurrent.Executors
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream
+import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream
+
+/**
+ * The speech models Gearslip listens with, in two roles: a streaming one that writes the words
+ * while the driver talks, and an optional final one that reads the whole phrase again once they
+ * stop, for a more accurate result. None ships in the APK: each is fetched once from sherpa-onnx's
+ * GitHub releases, where its authors publish it, and kept in the app's own storage.
+ */
+object SpeechModels {
+
+    enum class Role { LIVE, FINAL }
+
+    enum class Model(
+        val role: Role,
+        val id: String,
+        val label: String,
+        val detail: String,
+        val downloadMb: Int,
+        private val archive: String,
+        val encoder: String,
+        val decoder: String,
+        /** Empty for Canary, which decodes with attention and has no joiner. */
+        val joiner: String,
+        val modelType: String = "",
+    ) {
+        KROKO(
+            Role.LIVE, "kroko-en", "Kroko", "Banafo's Kroko ASR, CC BY-SA 4.0", 54,
+            "sherpa-onnx-streaming-zipformer-en-kroko-2025-08-06",
+            "encoder.onnx", "decoder.onnx", "joiner.onnx", modelType = "zipformer2",
+        ),
+        PARAKEET_SMALL(
+            Role.FINAL, "parakeet-110m-en", "Parakeet small", "Lighter and quicker, misses more names. NVIDIA NeMo, CC BY 4.0", 103,
+            "sherpa-onnx-nemo-parakeet_tdt_transducer_110m-en-36000-int8",
+            "encoder.int8.onnx", "decoder.int8.onnx", "joiner.int8.onnx", modelType = "nemo_transducer",
+        ),
+        CANARY(
+            Role.FINAL, "canary-180m-en", "Canary", "In between: better than Parakeet small, quicker than large. NVIDIA NeMo, CC BY 4.0", 154,
+            "sherpa-onnx-nemo-canary-180m-flash-en-es-de-fr-int8",
+            "encoder.int8.onnx", "decoder.int8.onnx", "", modelType = "canary",
+        ),
+        PARAKEET_LARGE(
+            Role.FINAL, "parakeet-0.6b-en", "Parakeet large", "Recommended. Hears names and places best. NVIDIA NeMo, CC BY 4.0", 460,
+            "sherpa-onnx-nemo-parakeet-tdt-0.6b-v2-int8",
+            "encoder.int8.onnx", "decoder.int8.onnx", "joiner.int8.onnx", modelType = "nemo_transducer",
+        ),
+        ;
+
+        val url get() = "https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/$archive.tar.bz2"
+        val files get() = listOf(encoder, decoder, joiner, "tokens.txt").filter { it.isNotEmpty() }
+    }
+
+    sealed interface State {
+        data object Missing : State
+        data class Downloading(val percent: Int) : State
+        data object Ready : State
+        data class Failed(val reason: String) : State
+    }
+
+    private const val PREFS = "speech"
+    private const val KEY_MODEL = "model"
+    private const val KEY_FINAL = "final_model"
+
+    private val worker = Executors.newSingleThreadExecutor { Thread(it, "gearslip-speech-download") }
+    private val states = Model.entries.associateWith { MutableStateFlow<State>(State.Missing) }
+    private val _selected = MutableStateFlow(Model.KROKO)
+    val selected: StateFlow<Model> = _selected.asStateFlow()
+    private val _final = MutableStateFlow<Model?>(Model.PARAKEET_LARGE)
+
+    /** The model that rereads the whole phrase at the end; null to keep the live model's words. */
+    val final: StateFlow<Model?> = _final.asStateFlow()
+    @Volatile private var cancelled: Model? = null
+
+    fun init(context: Context) {
+        val id = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).getString(KEY_MODEL, null)
+        _selected.value = Model.entries.firstOrNull { it.id == id && it.role == Role.LIVE } ?: Model.KROKO
+        val finalId = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).getString(KEY_FINAL, Model.PARAKEET_LARGE.id)
+        _final.value = Model.entries.firstOrNull { it.id == finalId && it.role == Role.FINAL }
+        Model.entries.forEach { m -> if (isReady(context, m)) states.getValue(m).value = State.Ready }
+        // Models an older build offered and this one doesn't: hundreds of MB nobody can use.
+        val known = Model.entries.map { it.id }.toSet()
+        File(context.filesDir, "speech").listFiles()?.filter { it.isDirectory && it.name !in known }?.forEach {
+            GearslipLog.i("speech: removing ${it.name}, no longer offered")
+            it.deleteRecursively()
+        }
+    }
+
+    fun state(model: Model): StateFlow<State> = states.getValue(model).asStateFlow()
+
+    fun dir(context: Context, model: Model) = File(File(context.filesDir, "speech"), model.id)
+
+    fun isReady(context: Context, model: Model) = model.files.all { File(dir(context, model), it).isFile }
+
+    fun select(context: Context, model: Model) {
+        if (model.role == Role.FINAL) return selectFinal(context, model)
+        _selected.value = model
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).edit().putString(KEY_MODEL, model.id).apply()
+        SpeechEngine.unload()
+    }
+
+    /** [model] null keeps the live words as they are. */
+    fun selectFinal(context: Context, model: Model?) {
+        _final.value = model
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).edit().putString(KEY_FINAL, model?.id ?: "none").apply()
+        SpeechEngine.unload()
+    }
+
+    fun delete(context: Context, model: Model) {
+        cancelled = model
+        dir(context, model).deleteRecursively()
+        states.getValue(model).value = State.Missing
+        if (model == _selected.value || model == _final.value) SpeechEngine.unload()
+    }
+
+    /** Fetches [model] and unpacks just the files the recognizer reads; the rest of the archive is skipped. */
+    fun download(context: Context, model: Model) {
+        val app = context.applicationContext
+        val state = states.getValue(model)
+        if (state.value is State.Downloading || state.value == State.Ready) return
+        state.value = State.Downloading(0)
+        cancelled = null
+        worker.execute {
+            val target = dir(app, model)
+            val partial = File(target.parentFile, "${model.id}.partial").apply { deleteRecursively(); mkdirs() }
+            try {
+                val conn = (URL(model.url).openConnection() as HttpURLConnection).apply {
+                    connectTimeout = 15_000
+                    readTimeout = 30_000
+                    instanceFollowRedirects = true
+                }
+                check(conn.responseCode == 200) { "the server answered ${conn.responseCode}" }
+                val total = conn.contentLengthLong.takeIf { it > 0 } ?: (model.downloadMb * 1_048_576L)
+                val counting = CountingStream(conn.inputStream) { read ->
+                    if (cancelled == model) throw InterruptedException("cancelled")
+                    state.value = State.Downloading(((read * 100) / total).toInt().coerceIn(0, 99))
+                }
+                TarArchiveInputStream(BZip2CompressorInputStream(counting.buffered())).use { tar ->
+                    while (true) {
+                        val entry = tar.nextEntry ?: break
+                        val name = entry.name.substringAfterLast('/')
+                        if (entry.isDirectory || name !in model.files) continue
+                        File(partial, name).outputStream().use { tar.copyTo(it) }
+                    }
+                }
+                check(model.files.all { File(partial, it).isFile }) { "the archive was missing files" }
+                target.deleteRecursively()
+                check(partial.renameTo(target)) { "couldn't store the model" }
+                GearslipLog.i("speech: downloaded ${model.label}")
+                state.value = State.Ready
+            } catch (e: Exception) {
+                partial.deleteRecursively()
+                if (cancelled == model) {
+                    state.value = State.Missing
+                } else {
+                    GearslipLog.w("speech: download of ${model.label} failed: ${e.message}")
+                    state.value = State.Failed(e.message ?: e.javaClass.simpleName)
+                }
+            }
+        }
+    }
+
+    /** Counts bytes as they pass, reporting about every megabyte. */
+    private class CountingStream(
+        private val inner: java.io.InputStream,
+        private val onProgress: (Long) -> Unit,
+    ) : java.io.InputStream() {
+        private var read = 0L
+        private var reported = 0L
+
+        override fun read(): Int = inner.read().also { if (it >= 0) count(1) }
+        override fun read(b: ByteArray, off: Int, len: Int): Int = inner.read(b, off, len).also { if (it > 0) count(it.toLong()) }
+        override fun close() = inner.close()
+
+        private fun count(n: Long) {
+            read += n
+            if (read - reported >= 1_048_576) {
+                reported = read
+                onProgress(read)
+            }
+        }
+    }
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AudioChoiceDialog.kt

@@ -47,3 +47,25 @@ fun AudioChoiceDialog(onUseBluetooth: () -> Unit, onKeepAsking: () -> Unit) {
         dismissButton = { TextButton(onClick = onKeepAsking) { Text("Keep asking") } },
     )
 }
+
+/**
+ * Android lets an app capture other apps' audio only while it holds the microphone permission.
+ * Once the driver has refused that twice, Android stops asking, and music silently stays on the
+ * phone; this says why and where to turn it back on.
+ */
+@Composable
+fun MicBlockedDialog(onOpenSettings: () -> Unit, onDismiss: () -> Unit) {
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Car audio needs the microphone permission") },
+        text = {
+            Text(
+                "Android lets an app send other apps' sound to the car only if it has the " +
+                    "microphone permission. It's turned off for Gearslip, so music plays on the " +
+                    "phone. Turn it on under Permissions, then Microphone.",
+            )
+        },
+        confirmButton = { TextButton(onClick = onOpenSettings) { Text("Open app settings") } },
+        dismissButton = { TextButton(onClick = onDismiss) { Text("Not now") } },
+    )
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/GearslipApp.kt

@@ -16,11 +16,9 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.layout.windowInsetsPadding
-import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
-import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
@@ -39,7 +37,7 @@ import app.seb3thehacker.gearslip.BuildConfig
 import app.seb3thehacker.gearslip.CertProvider
 import app.seb3thehacker.gearslip.stats.UsageStats
 
-private enum class Screen { HOME, LOGS, SETTINGS, CAR_PREVIEW, CERT_SETUP, SETUP_GUIDE, USAGE_NOTES, HELP, WHATS_NEW, RECOMMENDED_APPS }
+private enum class Screen { INTRO, HOME, LOGS, SETTINGS, CAR_PREVIEW, CERT_SETUP, SETUP_GUIDE, USAGE_NOTES, HELP, WHATS_NEW, RECOMMENDED_APPS }
 
 /** Three screens and a back stack of depth one: no navigation library needed. */
 @Composable
@@ -49,20 +47,22 @@ fun GearslipApp(onDisconnect: () -> Unit, onRequestCallScreening: () -> Unit) {
         !AppSettings.hasSkippedCertSetup(context) && !CertProvider.hasAnyCert(context)
     }
     val needsSetupGuide = remember { !AppSettings.hasSeenPermissionsSetup(context) }
-    var screen by rememberSaveable {
-        mutableStateOf(
-            when {
-                needsCertSetup -> Screen.CERT_SETUP
-                needsSetupGuide -> Screen.SETUP_GUIDE
-                // Set up before usage notes existed: ask once, on the setup guide's own page.
-                !UsageStats.asked(context) -> Screen.USAGE_NOTES
-                else -> Screen.HOME
-            },
-        )
+    // Where launch goes once the intro (if any) is done.
+    val afterIntro = remember {
+        when {
+            needsCertSetup -> Screen.CERT_SETUP
+            needsSetupGuide -> Screen.SETUP_GUIDE
+            // Set up before usage notes existed: ask once, on the setup guide's own page.
+            !UsageStats.asked(context) -> Screen.USAGE_NOTES
+            else -> Screen.HOME
+        }
     }
+    var screen by rememberSaveable { mutableStateOf(if (Intro.due(context)) Screen.INTRO else afterIntro) }
+    // A replay from About goes back to Settings; the launch one carries on into setup.
+    var introReturn by rememberSaveable { mutableStateOf(afterIntro) }
     // Home's usage notes row opens Settings at that section rather than at the top.
     var settingsAtUsageNotes by rememberSaveable { mutableStateOf(false) }
-    BackHandler(enabled = screen != Screen.HOME) {
+    BackHandler(enabled = screen != Screen.HOME && screen != Screen.INTRO) {
         screen = if (screen == Screen.RECOMMENDED_APPS) Screen.SETTINGS else Screen.HOME
     }
 
@@ -95,10 +95,11 @@ fun GearslipApp(onDisconnect: () -> Unit, onRequestCallScreening: () -> Unit) {
             .windowInsetsPadding(WindowInsets.statusBars)
             .consumeWindowInsets(WindowInsets.statusBars),
     ) {
-        if (BuildConfig.DEBUG && screen != Screen.CAR_PREVIEW) DevBuildBanner()
+        if (BuildConfig.DEBUG && screen != Screen.CAR_PREVIEW && screen != Screen.INTRO) DevBuildBanner()
 
         Column(Modifier.weight(1f)) {
             when (screen) {
+                Screen.INTRO -> IntroScreen(onDone = { screen = introReturn })
                 Screen.HOME -> HomeScreen(
                     onOpenLogs = { screen = Screen.LOGS },
                     onOpenSettings = { settingsAtUsageNotes = false; screen = Screen.SETTINGS },
@@ -114,6 +115,7 @@ fun GearslipApp(onDisconnect: () -> Unit, onRequestCallScreening: () -> Unit) {
                     onOpenRecommendedApps = { settingsAtUsageNotes = false; screen = Screen.RECOMMENDED_APPS },
                     onOpenWhatsNew = { settingsAtUsageNotes = false; screen = Screen.WHATS_NEW },
                     onReplayTutorial = { screen = Screen.SETUP_GUIDE },
+                    onReplayIntro = { introReturn = Screen.SETTINGS; screen = Screen.INTRO },
                     atUsageNotes = settingsAtUsageNotes,
                 )
                 Screen.RECOMMENDED_APPS -> RecommendedAppsScreen(onBack = { screen = Screen.SETTINGS })
@@ -141,8 +143,6 @@ fun GearslipApp(onDisconnect: () -> Unit, onRequestCallScreening: () -> Unit) {
         // A car keyboard is open: offer the phone's own, for a passenger.
         if (screen != Screen.CAR_PREVIEW) PhoneTypingBar()
     }
-
-    CompatWarning()
 }
 
 /**
@@ -167,29 +167,3 @@ private fun DevBuildBanner() {
         }
     }
 }
-
-/** Shown once, on first run: the certificate is known to fail on head units newer than ~2020. */
-@Composable
-private fun CompatWarning() {
-    val context = LocalContext.current
-    var visible by rememberSaveable { mutableStateOf(!AppSettings.hasSeenCompatWarning(context)) }
-
-    if (visible) {
-        AlertDialog(
-            onDismissRequest = {},
-            title = { Text("Before you plug in") },
-            text = {
-                Text(
-                    "Gearslip works with cars built before 2020. " +
-                        "Newer firmware often blocks the connection.",
-                )
-            },
-            confirmButton = {
-                TextButton(onClick = {
-                    AppSettings.setSeenCompatWarning(context)
-                    visible = false
-                }) { Text("Got it") }
-            },
-        )
-    }
-}

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/HomeScreen.kt

@@ -112,6 +112,10 @@ fun HomeScreen(
                         Spacer(Modifier.height(16.dp))
                         WirelessCard()
                     }
+                    if (!live) {
+                        Spacer(Modifier.height(16.dp))
+                        SupportCard()
+                    }
                 }
 
                 // Sits at the bottom, where a thumb reaches it.

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/IntroScreen.kt

@@ -0,0 +1,726 @@
+package app.seb3thehacker.gearslip.ui
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.provider.Settings
+import androidx.activity.compose.BackHandler
+import androidx.compose.animation.core.Animatable
+import androidx.compose.animation.core.CubicBezierEasing
+import androidx.compose.animation.core.FastOutSlowInEasing
+import androidx.compose.animation.core.LinearEasing
+import androidx.compose.animation.core.RepeatMode
+import androidx.compose.animation.core.animateDpAsState
+import androidx.compose.animation.core.animateFloat
+import androidx.compose.animation.core.infiniteRepeatable
+import androidx.compose.animation.core.keyframes
+import androidx.compose.animation.core.rememberInfiniteTransition
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentWidth
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.StrokeCap
+import androidx.compose.ui.graphics.StrokeJoin
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.graphics.drawscope.rotate
+import androidx.compose.ui.graphics.drawscope.scale
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.TextUnit
+import androidx.compose.ui.unit.dp
+import app.seb3thehacker.gearslip.BuildConfig
+import androidx.compose.runtime.collectAsState
+import androidx.compose.ui.draw.clipToBounds
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.graphics.BlendMode
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.CompositingStrategy
+import androidx.compose.foundation.layout.wrapContentHeight
+import app.seb3thehacker.gearslip.speech.SpeechModels
+import app.seb3thehacker.gearslip.stats.UsageStats
+import kotlin.math.PI
+import kotlin.math.cos
+import kotlin.math.atan2
+import kotlin.math.sqrt
+import kotlin.math.sin
+import kotlin.random.Random
+import kotlinx.coroutines.delay
+
+/**
+ * The release intro: a few tap-through screens shown once after each new release (and on a new
+ * install), before setup. Its look follows the 0.3 mockup: Material shapes in the phone's own colours,
+ * with every size taken from the screen's width so it scales from small phones to tablets.
+ */
+object Intro {
+    private const val PREFS = "intro"
+    private const val KEY_SEEN = "seen_release"
+
+    /** "0.3" from "0.3.00-alpha": the intro belongs to a release, not to each patch. */
+    val release: String = BuildConfig.VERSION_NAME.split('.').take(2).joinToString(".")
+
+    fun due(context: Context): Boolean =
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).getString(KEY_SEEN, null) != release
+
+    fun markSeen(context: Context) {
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).edit().putString(KEY_SEEN, release).apply()
+    }
+}
+
+/** The intro's tones, taken from the phone's own Material You colours like the rest of the app. */
+private class IntroColors(
+    val surface: Color, val onSurface: Color, val onVariant: Color, val outline: Color,
+    val primary: Color, val onPrimary: Color, val primaryC: Color, val onPrimaryC: Color,
+    val tertiaryC: Color, val onTertiaryC: Color, val secondaryC: Color, val onSecondaryC: Color,
+)
+
+@Composable
+private fun introColors(): IntroColors {
+    val m = MaterialTheme.colorScheme
+    return IntroColors(
+        surface = m.surface, onSurface = m.onSurface, onVariant = m.onSurfaceVariant, outline = m.outline,
+        primary = m.primary, onPrimary = m.onPrimary, primaryC = m.primaryContainer, onPrimaryC = m.onPrimaryContainer,
+        tertiaryC = m.tertiaryContainer, onTertiaryC = m.onTertiaryContainer,
+        secondaryC = m.secondaryContainer, onSecondaryC = m.onSecondaryContainer,
+    )
+}
+
+private enum class IntroStep { WELCOME, WIRELESS, KNOBS, VOICE, GRAPHENE, THANKS, APPS, DRIVE }
+
+private val Pop = CubicBezierEasing(0.3f, 1.6f, 0.5f, 1f)
+private val Rise = CubicBezierEasing(0.2f, 0.8f, 0.2f, 1f)
+
+@Composable
+fun IntroScreen(onDone: () -> Unit) {
+    val context = LocalContext.current
+    val c = introColors()
+    // The GrapheneOS screen is only news to people running it.
+    val steps = remember {
+        IntroStep.entries.filter { it != IntroStep.GRAPHENE || UsageStats.osName(context) == "GrapheneOS" }
+    }
+    var index by remember { mutableIntStateOf(0) }
+    val step = steps[index]
+    val finish = {
+        Intro.markSeen(context)
+        onDone()
+    }
+    BackHandler(enabled = index > 0) { index-- }
+
+    BoxWithConstraints(
+        Modifier
+            .fillMaxSize()
+            .background(c.surface)
+            .clickable(interactionSource = remember { MutableInteractionSource() }, indication = null) {
+                if (index < steps.lastIndex) index++
+            },
+    ) {
+        val w = maxWidth
+        // The mockup's cqw: one percent of the screen's width.
+        fun cq(n: Float): Dp = w * (n / 100f)
+        val density = LocalDensity.current
+        fun cqSp(n: Float): TextUnit = with(density) { cq(n).toSp() }
+
+        when (step) {
+            IntroStep.WELCOME -> Welcome(c, ::cq, ::cqSp, maxHeight)
+            IntroStep.WIRELESS -> BadgeStep(c, ::cq, ::cqSp, c.secondaryC, "Wireless.",
+                "If your car does wireless Android Auto, pair once and leave the cable at home.", step) { WifiIcon(c.onSecondaryC) }
+            IntroStep.KNOBS -> BadgeStep(c, ::cq, ::cqSp, c.tertiaryC, "Knobs work.",
+                "Turn, push, done. No touchscreen? Gearslip doesn't need one anymore.", step) { DialIcon(c.onTertiaryC) }
+            IntroStep.VOICE -> VoiceStep(c, ::cq, ::cqSp, step)
+            IntroStep.GRAPHENE -> BadgeStep(c, ::cq, ::cqSp, c.secondaryC, "Protections back on.",
+                "On GrapheneOS, Gearslip no longer needs exploit protection compatibility mode. If you " +
+                    "turned it on for Gearslip, turn it off to get full protection back.", step,
+                action = "Open app settings" to {
+                    runCatching {
+                        context.startActivity(
+                            Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, Uri.fromParts("package", context.packageName, null)),
+                        )
+                    }
+                },
+                outlined = true,
+            ) { ShieldIcon(c.onSecondaryC, c.secondaryC) }
+            IntroStep.THANKS -> BadgeStep(c, ::cq, ::cqSp, c.tertiaryC, "Thank you.",
+                "To everyone sending usage notes: they show me which cars Gearslip works in and which " +
+                    "ones still fail, so I know what to fix next. Every note helps.", step) { HeartIcon(c.onTertiaryC) }
+            IntroStep.APPS -> BadgeStep(c, ::cq, ::cqSp, c.secondaryC, "Good company.",
+                "Free, open-source apps that work well in the car. Tap one to see it on GitHub.", step,
+                extra = { AppPicks(c, ::cq, ::cqSp, step) }) { StarIcon(c.onSecondaryC) }
+            IntroStep.DRIVE -> BadgeStep(c, ::cq, ::cqSp, c.primaryC, "Let's drive.",
+                "That's ${Intro.release}. Plug in, or just get in.", step,
+                action = "Start" to finish) { CheckIcon(c.onPrimaryC) }
+        }
+
+        Dots(c, steps.size, index, ::cq, Modifier.align(Alignment.BottomCenter).padding(bottom = maxHeight * 0.05f))
+        if (step != IntroStep.DRIVE) Hint(c, ::cqSp, step, Modifier.align(Alignment.BottomCenter).padding(bottom = maxHeight * 0.09f))
+    }
+}
+
+/** 0 to 1 once each time [key] changes, after [delayMs]: drives the entrance of one element. */
+@Composable
+private fun entrance(key: Any, delayMs: Int, durationMs: Int = 650): Float {
+    val a = remember(key) { Animatable(0f) }
+    LaunchedEffect(key) {
+        delay(delayMs.toLong())
+        a.animateTo(1f, tween(durationMs, easing = LinearEasing))
+    }
+    return a.value
+}
+
+/** Slides up and fades in, like the mockup's `up`. */
+private fun Modifier.up(p: Float, distance: Dp) = graphicsLayer {
+    val e = Rise.transform(p)
+    alpha = e
+    translationY = (1 - e) * distance.toPx()
+}
+
+/** Grows in with a bounce, like the mockup's `bounce`. */
+private fun Modifier.pop(p: Float) = graphicsLayer {
+    val e = Pop.transform(p)
+    alpha = p.coerceAtMost(1f)
+    scaleX = 0.5f + 0.5f * e
+    scaleY = 0.5f + 0.5f * e
+}
+
+@Composable
+private fun Welcome(c: IntroColors, cq: (Float) -> Dp, cqSp: (Float) -> TextUnit, height: Dp) {
+    val key = IntroStep.WELCOME
+    val spin by rememberInfiniteTransition(label = "spin").animateFloat(
+        0f, 360f, infiniteRepeatable(tween(18_000, easing = LinearEasing)), label = "spin",
+    )
+    Box(Modifier.fillMaxSize()) {
+        Cookie(c.primaryC, Modifier.size(cq(120f)).offset(x = cq(28f), y = -cq(22f)).align(Alignment.TopEnd).graphicsLayer { rotationZ = spin; alpha = 0.9f })
+        Ticker(c.secondaryC, c.onSecondaryC, "OPEN SOURCE ✦ NO ACCOUNT ✦ YOUR CAR, YOUR PHONE ✦ ", cq, cqSp, reverse = true, tilt = 3f,
+            key = key, modifier = Modifier.align(Alignment.TopCenter).padding(top = height * 0.11f))
+
+        Column(Modifier.align(Alignment.CenterStart).padding(horizontal = cq(8f))) {
+            Text("Welcome to", color = c.onVariant, style = TextStyle(fontSize = cqSp(4.2f), fontWeight = FontWeight.SemiBold),
+                modifier = Modifier.up(entrance(key, 100), cq(7f)))
+            Text(
+                Intro.release, color = c.primary,
+                style = TextStyle(fontSize = cqSp(44f), fontWeight = FontWeight.Black, letterSpacing = cqSp(-2.4f), lineHeight = cqSp(38f)),
+                modifier = Modifier.offset(x = -cq(1.5f)).pop(entrance(key, 250, 900)),
+            )
+            Text(
+                "alpha · the big one", color = c.onTertiaryC,
+                style = TextStyle(fontSize = cqSp(4f), fontWeight = FontWeight.Bold),
+                modifier = Modifier.padding(top = cq(4f)).up(entrance(key, 700), cq(7f))
+                    .clip(RoundedCornerShape(50)).background(c.tertiaryC).padding(horizontal = cq(4.4f), vertical = cq(2.2f)),
+            )
+        }
+
+        Ticker(c.primary, c.onPrimary, "WIRELESS ✦ KNOB SUPPORT ✦ OFFLINE VOICE ✦ FASTER VIDEO ✦ AUTO UPDATES ✦ ", cq, cqSp, reverse = false, tilt = -4f,
+            key = key, modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = height * 0.15f))
+        Confetti(c, key, Modifier.fillMaxSize())
+    }
+}
+
+/** A tilted band of words scrolling past, slid in from the side when the step opens. */
+@Composable
+private fun Ticker(
+    bg: Color, fg: Color, words: String, cq: (Float) -> Dp, cqSp: (Float) -> TextUnit,
+    reverse: Boolean, tilt: Float, key: Any, modifier: Modifier,
+) {
+    val enter = entrance(key, 400, 800)
+    val scroll by rememberInfiniteTransition(label = "ticker").animateFloat(
+        0f, 1f, infiniteRepeatable(tween(if (reverse) 20_000 else 16_000, easing = LinearEasing)), label = "ticker",
+    )
+    Box(
+        modifier
+            .fillMaxWidth()
+            .graphicsLayer {
+                rotationZ = tilt
+                scaleX = 1.2f
+                val e = Rise.transform(enter)
+                alpha = e
+                translationX = (1 - e) * -cq(30f).toPx()
+            }
+            .background(bg)
+            .padding(vertical = cq(2.6f)),
+    ) {
+        Text(
+            words.repeat(4),
+            color = fg, maxLines = 1, softWrap = false,
+            style = TextStyle(fontSize = cqSp(5f), fontWeight = FontWeight.ExtraBold),
+            modifier = Modifier
+                .wrapContentWidth(Alignment.Start, unbounded = true)
+                .graphicsLayer {
+                    // The text holds the words four times; sliding by half loops cleanly.
+                    val shift = size.width / 2f * (if (reverse) 1 - scroll else scroll)
+                    translationX = -shift
+                },
+        )
+    }
+}
+
+/** Material shapes thrown once from behind the version number. */
+@Composable
+private fun Confetti(c: IntroColors, key: Any, modifier: Modifier) {
+    val p = entrance(key, 450, 1300)
+    val bits = remember {
+        val r = Random(7)
+        List(22) { i ->
+            val a = i / 22f * 2 * PI.toFloat() + r.nextFloat() * 0.4f
+            val d = 30f + r.nextFloat() * 45f
+            Bit(cos(a) * d, sin(a) * d * 1.2f, r.nextInt(-270, 270).toFloat(), i % 4, i % 3)
+        }
+    }
+    if (p <= 0f || p >= 1f) return
+    val tones = listOf(c.primary, c.primaryC, c.tertiaryC, c.secondaryC)
+    Canvas(modifier) {
+        val unit = size.width / 100f
+        val e = CubicBezierEasing(0.15f, 0.7f, 0.3f, 1f).transform(p)
+        val alpha = if (p < 0.7f) 1f else 1f - (p - 0.7f) / 0.3f
+        val origin = Offset(size.width * 0.3f, size.height * 0.42f)
+        bits.forEach { b ->
+            val at = origin + Offset(b.dx * unit * e, b.dy * unit * e)
+            val s = 3.6f * unit * (0.3f + 0.7f * e)
+            rotate(b.spin * e, at) {
+                val color = tones[b.tone].copy(alpha = alpha)
+                when (b.shape) {
+                    0 -> drawCircle(color, s / 2, at)
+                    1 -> drawRoundRect(color, at - Offset(s / 2, s / 2), Size(s, s), androidx.compose.ui.geometry.CornerRadius(unit))
+                    else -> drawRoundRect(color, at - Offset(s / 2, s / 4), Size(s, s / 2), androidx.compose.ui.geometry.CornerRadius(s / 4))
+                }
+            }
+        }
+    }
+}
+
+private class Bit(val dx: Float, val dy: Float, val spin: Float, val tone: Int, val shape: Int)
+
+/** One idea per screen: a spinning cookie with an icon, a headline, a line of text, maybe a button. */
+@Composable
+private fun BadgeStep(
+    c: IntroColors, cq: (Float) -> Dp, cqSp: (Float) -> TextUnit, badge: Color,
+    title: String, body: String, key: Any,
+    action: Pair<String, () -> Unit>? = null, outlined: Boolean = false,
+    extra: (@Composable () -> Unit)? = null,
+    icon: @Composable () -> Unit,
+) {
+    val spin by rememberInfiniteTransition(label = "spin").animateFloat(
+        0f, 360f, infiniteRepeatable(tween(18_000, easing = LinearEasing)), label = "spin",
+    )
+    Column(
+        Modifier.fillMaxSize().padding(horizontal = cq(8f)),
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Box(Modifier.size(cq(34f)).pop(entrance(key, 50, 800)), contentAlignment = Alignment.Center) {
+            Cookie(badge, Modifier.fillMaxSize().graphicsLayer { rotationZ = spin })
+            Box(Modifier.size(cq(15f))) { icon() }
+        }
+        Spacer(Modifier.height(cq(8f)))
+        Text(
+            title, color = c.onSurface,
+            style = TextStyle(fontSize = cqSp(13.5f), fontWeight = FontWeight.Black, letterSpacing = cqSp(-0.6f), lineHeight = cqSp(12.5f)),
+            modifier = Modifier.up(entrance(key, 200, 700), cq(7f)),
+        )
+        Spacer(Modifier.height(cq(4f)))
+        Text(
+            body, color = c.onVariant,
+            style = TextStyle(fontSize = cqSp(4.5f), lineHeight = cqSp(6.5f)),
+            modifier = Modifier.up(entrance(key, 350, 700), cq(7f)),
+        )
+        extra?.invoke()
+        if (action != null) {
+            val (label, onClick) = action
+            Spacer(Modifier.height(if (outlined) cq(7f) else cq(9f)))
+            Text(
+                label,
+                color = if (outlined) c.primary else c.onPrimary,
+                style = TextStyle(fontSize = cqSp(if (outlined) 4.4f else 4.6f), fontWeight = FontWeight.Bold),
+                modifier = Modifier
+                    .up(entrance(key, 500, 700), cq(7f))
+                    .clip(RoundedCornerShape(50))
+                    .then(
+                        if (outlined) Modifier.border(BorderStroke(2.dp, c.outline), RoundedCornerShape(50))
+                        else Modifier.background(c.primary),
+                    )
+                    .clickable(onClick = onClick)
+                    .padding(horizontal = if (outlined) cq(7f) else cq(9f), vertical = if (outlined) cq(3.6f) else cq(4.2f)),
+            )
+        }
+    }
+}
+
+/**
+ * Voice: a few things to say, drifting past, and a button that fetches both speech models so the
+ * assistant works the first time someone tries it in the car.
+ */
+@Composable
+private fun VoiceStep(c: IntroColors, cq: (Float) -> Dp, cqSp: (Float) -> TextUnit, key: IntroStep) {
+    val context = LocalContext.current
+    remember { SpeechModels.init(context) }
+    val needed = listOf(SpeechModels.Model.KROKO, SpeechModels.Model.PARAKEET_LARGE)
+    val states = needed.map { SpeechModels.state(it).collectAsState().value }
+    val ready = states.all { it == SpeechModels.State.Ready }
+    val label = when {
+        states.any { it is SpeechModels.State.Downloading } ->
+            "Downloading, ${needed.zip(states).sumOf { (m, st) -> m.downloadMb * percentOf(st) } / needed.sumOf { it.downloadMb }}%"
+        states.any { it is SpeechModels.State.Failed } -> "Download failed. Try again"
+        else -> "Download voice, ${needed.sumOf { it.downloadMb }} MB"
+    }
+    BadgeStep(
+        c, cq, cqSp, c.primaryC, "Just say it.",
+        "Tap the mic, or press the talk button on your wheel, and speak. Your phone turns speech " +
+            "into text by itself, and nothing you say leaves it. Say \"help\" in the car for the full list.",
+        key,
+        action = if (ready) null else label to { needed.forEach { SpeechModels.download(context, it) } },
+        outlined = true,
+        extra = { CommandDrift(c, cq, cqSp, key) },
+    ) { MicIcon(c.onPrimaryC) }
+}
+
+private fun percentOf(state: SpeechModels.State) = when (state) {
+    SpeechModels.State.Ready -> 100
+    is SpeechModels.State.Downloading -> state.percent
+    else -> 0
+}
+
+private val SAMPLE_COMMANDS = listOf(
+    "Play Daft Punk", "What's playing?", "Next song",
+    "Call Mom", "Open Organic Maps", "Pause", "Help",
+)
+
+/** Example commands rising slowly through a window that fades at both edges. */
+@Composable
+private fun CommandDrift(c: IntroColors, cq: (Float) -> Dp, cqSp: (Float) -> TextUnit, key: Any) {
+    val scroll by rememberInfiniteTransition(label = "drift").animateFloat(
+        0f, 1f, infiniteRepeatable(tween(SAMPLE_COMMANDS.size * 2_200, easing = LinearEasing)), label = "drift",
+    )
+    Box(
+        Modifier
+            .padding(top = cq(6f))
+            .fillMaxWidth()
+            .height(cq(34f))
+            .up(entrance(key, 500, 700), cq(7f))
+            .graphicsLayer { compositingStrategy = CompositingStrategy.Offscreen }
+            .drawWithContent {
+                drawContent()
+                drawRect(
+                    Brush.verticalGradient(0f to Color.Transparent, 0.25f to Color.Black, 0.75f to Color.Black, 1f to Color.Transparent),
+                    blendMode = BlendMode.DstIn,
+                )
+            }
+            .clipToBounds(),
+    ) {
+        Column(
+            Modifier
+                .wrapContentHeight(Alignment.Top, unbounded = true)
+                // The list is there twice; rising by half loops cleanly.
+                .graphicsLayer { translationY = -size.height / 2f * scroll },
+            verticalArrangement = Arrangement.spacedBy(cq(2.4f)),
+        ) {
+            repeat(2) {
+                SAMPLE_COMMANDS.forEach { say ->
+                    Text(
+                        "\u201c$say\u201d", color = c.onSecondaryC,
+                        style = TextStyle(fontSize = cqSp(4.4f), fontWeight = FontWeight.SemiBold),
+                        modifier = Modifier
+                            .clip(RoundedCornerShape(50))
+                            .background(c.secondaryC)
+                            .padding(horizontal = cq(4.4f), vertical = cq(2f)),
+                    )
+                }
+            }
+        }
+    }
+}
+
+private val APP_PICKS = listOf(
+    Triple("Music", "Metrolist", "https://github.com/MetrolistGroup/Metrolist"),
+    Triple("Maps", "Vela", "https://github.com/PimpinPumpkin/Vela"),
+    Triple("Podcasts", "AntennaPod", "https://github.com/AntennaPod/AntennaPod"),
+)
+
+/** One row per pick, each opening the app's GitHub page; they arrive one after another. */
+@Composable
+private fun AppPicks(c: IntroColors, cq: (Float) -> Dp, cqSp: (Float) -> TextUnit, key: IntroStep) {
+    val context = LocalContext.current
+    Column(Modifier.padding(top = cq(6f)), verticalArrangement = Arrangement.spacedBy(cq(2.6f))) {
+        APP_PICKS.forEachIndexed { i, (kind, name, url) ->
+            Row(
+                Modifier
+                    .fillMaxWidth()
+                    .up(entrance(key, 500 + i * 120, 700), cq(7f))
+                    .clip(RoundedCornerShape(cq(5f)))
+                    .background(c.secondaryC)
+                    .clickable {
+                        runCatching {
+                            context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url)).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+                        }
+                    }
+                    .padding(horizontal = cq(5f), vertical = cq(3.4f)),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Column(Modifier.weight(1f)) {
+                    Text(kind.uppercase(), color = c.onSecondaryC.copy(alpha = 0.7f),
+                        style = TextStyle(fontSize = cqSp(3.2f), fontWeight = FontWeight.Bold, letterSpacing = cqSp(0.3f)))
+                    Text(name, color = c.onSecondaryC, style = TextStyle(fontSize = cqSp(5.2f), fontWeight = FontWeight.ExtraBold))
+                }
+                Text("GitHub ↗", color = c.onSecondaryC, style = TextStyle(fontSize = cqSp(3.8f), fontWeight = FontWeight.SemiBold))
+            }
+        }
+    }
+}
+
+/** Material's scalloped "cookie": a circle whose radius waves around its edge. */
+@Composable
+private fun Cookie(color: Color, modifier: Modifier) {
+    Canvas(modifier) {
+        val unit = size.minDimension / 100f
+        val path = Path()
+        var deg = 0
+        while (deg <= 360) {
+            val a = deg * PI / 180
+            val r = (44 + 4.5 * cos(9 * a)) * unit
+            val x = center.x + (r * cos(a)).toFloat()
+            val y = center.y + (r * sin(a)).toFloat()
+            if (deg == 0) path.moveTo(x, y) else path.lineTo(x, y)
+            deg += 3
+        }
+        path.close()
+        drawPath(path, color)
+    }
+}
+
+/** Draws in the mockup's 48-unit icon box. */
+private inline fun DrawScope.inIconBox(block: DrawScope.() -> Unit) {
+    val s = size.minDimension / 48f
+    scale(s, s, Offset.Zero) { block() }
+}
+
+@Composable
+private fun WifiIcon(color: Color) {
+    val t = rememberInfiniteTransition(label = "wifi")
+    val waves = (0..2).map { i ->
+        t.animateFloat(
+            0.35f, 1f,
+            infiniteRepeatable(tween(800, delayMillis = 0, easing = FastOutSlowInEasing), RepeatMode.Reverse,
+                initialStartOffset = androidx.compose.animation.core.StartOffset(i * 200)),
+            label = "wave$i",
+        )
+    }
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox {
+            val stroke = Stroke(5f, cap = StrokeCap.Round)
+            // The mockup's three arcs, inner to outer: radius r through (24 ± half, y).
+            listOf(Triple(8f, 6f, 34f), Triple(18f, 13f, 26f), Triple(28f, 20f, 18f)).forEachIndexed { i, (r, half, y) ->
+                val cy = y + sqrt(r * r - half * half)
+                val start = Math.toDegrees(atan2((y - cy).toDouble(), (-half).toDouble())).toFloat()
+                val end = Math.toDegrees(atan2((y - cy).toDouble(), half.toDouble())).toFloat()
+                drawArc(color.copy(alpha = waves[i].value), start, (end - start + 360f) % 360f, false,
+                    Offset(24f - r, cy - r), Size(2 * r, 2 * r), style = stroke)
+            }
+            drawCircle(color, 3.6f, Offset(24f, 41f))
+        }
+    }
+}
+
+@Composable
+private fun DialIcon(color: Color) {
+    val angle by rememberInfiniteTransition(label = "dial").animateFloat(
+        -70f, -70f,
+        infiniteRepeatable(keyframes {
+            durationMillis = 2600
+            -70f at 0 using CubicBezierEasing(0.5f, 0f, 0.3f, 1f)
+            70f at 1040
+            70f at 1430 using CubicBezierEasing(0.5f, 0f, 0.3f, 1f)
+            -70f at 2470
+        }),
+        label = "dial",
+    )
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox {
+            drawCircle(color, 19f, Offset(24f, 24f), style = Stroke(5f))
+            rotate(angle, Offset(24f, 24f)) {
+                drawRoundRect(color, Offset(21.5f, 7f), Size(5f, 13f), androidx.compose.ui.geometry.CornerRadius(2.5f))
+            }
+        }
+    }
+}
+
+@Composable
+private fun MicIcon(color: Color) {
+    val t = rememberInfiniteTransition(label = "mic")
+    val waves = (0..1).map { i ->
+        t.animateFloat(
+            0.25f, 1f,
+            infiniteRepeatable(tween(700, easing = FastOutSlowInEasing), RepeatMode.Reverse,
+                initialStartOffset = androidx.compose.animation.core.StartOffset(i * 250)),
+            label = "mic$i",
+        )
+    }
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox {
+            drawRoundRect(color, Offset(18f, 5f), Size(12f, 22f), androidx.compose.ui.geometry.CornerRadius(6f))
+            val stroke = Stroke(4f, cap = StrokeCap.Round)
+            drawArc(color, 0f, 180f, false, Offset(12f, 14f), Size(24f, 22f), style = stroke)
+            drawLine(color, Offset(24f, 36f), Offset(24f, 42f), 4f, StrokeCap.Round)
+            // Sound waves either side, pulsing as if someone's talking.
+            listOf(1f to 0, -1f to 0, 1f to 1, -1f to 1).forEach { (side, i) ->
+                val r = if (i == 0) 15f else 21f
+                drawArc(color.copy(alpha = waves[i].value), if (side > 0) -35f else 145f, 70f, false,
+                    Offset(24f - r, 16f - r), Size(2 * r, 2 * r), style = stroke)
+            }
+        }
+    }
+}
+
+@Composable
+private fun StarIcon(color: Color) {
+    val turn by rememberInfiniteTransition(label = "star").animateFloat(
+        -8f, 8f, infiniteRepeatable(tween(1600, easing = FastOutSlowInEasing), RepeatMode.Reverse), label = "star",
+    )
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox {
+            val star = Path()
+            for (i in 0 until 10) {
+                val r = if (i % 2 == 0) 20f else 8.5f
+                val a = (-90 + i * 36) * PI / 180
+                val x = 24f + (r * cos(a)).toFloat()
+                val y = 25f + (r * sin(a)).toFloat()
+                if (i == 0) star.moveTo(x, y) else star.lineTo(x, y)
+            }
+            star.close()
+            rotate(turn, Offset(24f, 25f)) { drawPath(star, color) }
+        }
+    }
+}
+
+@Composable
+private fun ShieldIcon(color: Color, tick: Color) {
+    val p = entrance(IntroStep.GRAPHENE, 800, 500)
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox {
+            val shield = Path().apply {
+                moveTo(24f, 4f); lineTo(40f, 10f); lineTo(40f, 22f)
+                cubicTo(40f, 32f, 33f, 40f, 24f, 44f)
+                cubicTo(15f, 40f, 8f, 32f, 8f, 22f)
+                lineTo(8f, 10f); close()
+            }
+            drawPath(shield, color)
+            drawPartialStroke(listOf(Offset(16f, 24f), Offset(22f, 30f), Offset(33f, 18f)), p, tick, 4.5f)
+        }
+    }
+}
+
+@Composable
+private fun HeartIcon(color: Color) {
+    val beat by rememberInfiniteTransition(label = "beat").animateFloat(
+        1f, 1f,
+        infiniteRepeatable(keyframes {
+            durationMillis = 1400
+            1f at 0; 1.16f at 210; 1f at 420; 1.1f at 630; 1f at 840
+        }),
+        label = "beat",
+    )
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox {
+            scale(beat, beat, Offset(24f, 24f)) {
+                val heart = Path().apply {
+                    moveTo(24f, 41f)
+                    cubicTo(10f, 31f, 5f, 23f, 5f, 16f)
+                    cubicTo(5f, 10f, 10f, 6f, 15f, 6f)
+                    cubicTo(19f, 6f, 22f, 8f, 24f, 12f)
+                    cubicTo(26f, 8f, 29f, 6f, 33f, 6f)
+                    cubicTo(38f, 6f, 43f, 10f, 43f, 16f)
+                    cubicTo(43f, 23f, 38f, 31f, 24f, 41f)
+                    close()
+                }
+                drawPath(heart, color)
+            }
+        }
+    }
+}
+
+@Composable
+private fun CheckIcon(color: Color) {
+    val p = entrance(IntroStep.DRIVE, 300, 500)
+    Canvas(Modifier.fillMaxSize()) {
+        inIconBox { drawPartialStroke(listOf(Offset(10f, 26f), Offset(20f, 35f), Offset(38f, 14f)), p, color, 5.5f) }
+    }
+}
+
+/** A polyline drawn up to [progress] of its length, so a tick can sweep in. */
+private fun DrawScope.drawPartialStroke(points: List<Offset>, progress: Float, color: Color, width: Float) {
+    if (progress <= 0f) return
+    val lengths = points.zipWithNext { a, b -> (b - a).getDistance() }
+    var left = lengths.sum() * FastOutSlowInEasing.transform(progress.coerceAtMost(1f))
+    val path = Path().apply { moveTo(points[0].x, points[0].y) }
+    for (i in lengths.indices) {
+        if (left <= 0f) break
+        val f = (left / lengths[i]).coerceAtMost(1f)
+        val to = points[i] + (points[i + 1] - points[i]) * f
+        path.lineTo(to.x, to.y)
+        left -= lengths[i]
+    }
+    drawPath(path, color, style = Stroke(width, cap = StrokeCap.Round, join = StrokeJoin.Round))
+}
+
+@Composable
+private fun Dots(c: IntroColors, count: Int, current: Int, cq: (Float) -> Dp, modifier: Modifier) {
+    Row(modifier, horizontalArrangement = Arrangement.spacedBy(cq(2f))) {
+        repeat(count) { i ->
+            val on = i == current
+            val width by animateDpAsState(if (on) cq(7f) else cq(2f), tween(300), label = "dot")
+            Box(
+                Modifier
+                    .size(width, cq(2f))
+                    .clip(RoundedCornerShape(50))
+                    .background(if (on) c.primary else c.outline.copy(alpha = 0.45f)),
+            )
+        }
+    }
+}
+
+/** "Tap to continue", once the step has finished arriving, breathing softly. */
+@Composable
+private fun Hint(c: IntroColors, cqSp: (Float) -> TextUnit, key: Any, modifier: Modifier) {
+    val shown = entrance(key, 1600, 600)
+    val breathe by rememberInfiniteTransition(label = "hint").animateFloat(
+        0.75f, 0.35f, infiniteRepeatable(tween(1200), RepeatMode.Reverse), label = "hint",
+    )
+    Text(
+        "Tap to continue", color = c.onVariant,
+        style = TextStyle(fontSize = cqSp(3.6f), fontWeight = FontWeight.SemiBold),
+        modifier = modifier.graphicsLayer { alpha = if (shown < 1f) shown * 0.75f else breathe },
+    )
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/RecommendedApps.kt

@@ -54,6 +54,9 @@ private val recommended = listOf(
         RecommendedApp("ViVi Music", "com.vivi.vivimusic", "https://github.com/vivizzz007/vivi-music", "A YouTube Music player."),
         RecommendedApp("Metrolist", "com.metrolist.music", "https://github.com/MetrolistGroup/Metrolist", "A YouTube Music player."),
     ),
+    "Podcasts" to listOf(
+        RecommendedApp("AntennaPod", "de.danoeh.antennapod", "https://github.com/AntennaPod/AntennaPod", "Podcasts, chapters and all."),
+    ),
 )
 
 /** Opened from Settings: the same list the setup guide ends with. */

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/SettingsScreen.kt

@@ -73,6 +73,7 @@ fun SettingsScreen(
     onOpenRecommendedApps: () -> Unit,
     onOpenWhatsNew: () -> Unit,
     onReplayTutorial: () -> Unit,
+    onReplayIntro: () -> Unit,
     atUsageNotes: Boolean = false,
 ) {
     val scroll = rememberScrollState()
@@ -105,9 +106,10 @@ fun SettingsScreen(
             verticalArrangement = Arrangement.spacedBy(24.dp),
         ) {
             Spacer(Modifier.height(0.dp))
-            AboutSection(onOpenWhatsNew, onReplayTutorial)
+            AboutSection(onOpenWhatsNew, onReplayTutorial, onReplayIntro)
             ConnectionSection()
             CarAudioSection()
+            VoiceModelSection()
             if (SHOW_RECOMMENDED_APPS) AppsSection(onOpenRecommendedApps)
             CertificateSection()
             SettingsSection("Usage notes", header = USAGE_STATS_INTRO) { UsageStatsRows() }
@@ -125,7 +127,7 @@ private fun Arrow() = Icon(
 
 /** What's new, updates and the setup guide, one tap from the top. */
 @Composable
-private fun AboutSection(onOpenWhatsNew: () -> Unit, onReplayTutorial: () -> Unit) {
+private fun AboutSection(onOpenWhatsNew: () -> Unit, onReplayTutorial: () -> Unit, onReplayIntro: () -> Unit) {
     SettingsSection {
         SettingsRow(
             "What's new",
@@ -148,6 +150,16 @@ private fun AboutSection(onOpenWhatsNew: () -> Unit, onReplayTutorial: () -> Uni
             icon = Icons.Filled.Refresh,
             trailing = { Arrow() },
         )
+        SettingsDivider()
+        SettingsRow(
+            "Replay the ${Intro.release} intro",
+            Modifier.clickable(onClick = onReplayIntro),
+            subtitle = "What's in this release, in a few taps",
+            icon = Icons.Filled.Star,
+            trailing = { Arrow() },
+        )
+        SettingsDivider()
+        AboutLinkRows()
     }
 }
 

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/SupportViews.kt

@@ -0,0 +1,161 @@
+package app.seb3thehacker.gearslip.ui
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.KeyboardArrowRight
+import androidx.compose.material.icons.automirrored.filled.Send
+import androidx.compose.material.icons.filled.Build
+import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+
+/** Where Gearslip lives outside the app: donations, the chat room, and the code. */
+internal object GearslipLinks {
+    const val SPONSORS = "https://github.com/sponsors/Seb3thehacker"
+    const val LIBERAPAY = "https://liberapay.com/Seb3thehacker"
+    const val MATRIX = "https://matrix.to/#/!mf0_mgBd5KqKpc9FfX_wHp1jFCcwAtPrndIn_oGIyMk?via=matrix.org"
+    const val SOURCE = "https://github.com/Seb3thehacker/gearslip"
+
+    fun open(context: Context, url: String) {
+        runCatching {
+            context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url)).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+        }
+    }
+}
+
+/** "Hide for now" on the home card puts it away for this long; the About page keeps the links. */
+private const val HIDE_MS = 30L * 24 * 60 * 60 * 1000
+private const val PREFS = "support"
+private const val KEY_HIDDEN_UNTIL = "hidden_until"
+
+private fun hiddenUntil(context: Context) =
+    context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).getLong(KEY_HIDDEN_UNTIL, 0L)
+
+/**
+ * The donation ask on Home: always in view, never in the way. It sits below the status and update
+ * cards, and "Hide for now" puts it away for a month.
+ */
+@Composable
+internal fun SupportCard(modifier: Modifier = Modifier) {
+    val context = LocalContext.current
+    var hidden by remember { mutableStateOf(System.currentTimeMillis() < hiddenUntil(context)) }
+    if (hidden) return
+    val scheme = MaterialTheme.colorScheme
+    Surface(
+        modifier,
+        color = scheme.tertiaryContainer,
+        contentColor = scheme.onTertiaryContainer,
+        shape = MaterialTheme.shapes.extraLarge,
+    ) {
+        Column(Modifier.fillMaxWidth().padding(20.dp)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(Icons.Filled.Favorite, contentDescription = null)
+                Text(
+                    "Support Gearslip",
+                    style = MaterialTheme.typography.titleLarge,
+                    fontWeight = FontWeight.SemiBold,
+                    modifier = Modifier.padding(start = 12.dp),
+                )
+            }
+            Text(
+                "Gearslip is free, with no ads and no tracking. If it gets you on the road, a " +
+                    "donation keeps it going.",
+                style = MaterialTheme.typography.bodyMedium,
+                modifier = Modifier.padding(top = 8.dp),
+            )
+            Row(
+                Modifier.fillMaxWidth().padding(top = 12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                TextButton(
+                    onClick = {
+                        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE).edit()
+                            .putLong(KEY_HIDDEN_UNTIL, System.currentTimeMillis() + HIDE_MS).apply()
+                        hidden = true
+                    },
+                    contentPadding = PaddingValues(horizontal = 0.dp),
+                ) { Text("Hide for now") }
+                Spacer(Modifier.weight(1f))
+                OutlinedButton(onClick = { GearslipLinks.open(context, GearslipLinks.LIBERAPAY) }) { Text("Liberapay") }
+                Button(onClick = { GearslipLinks.open(context, GearslipLinks.SPONSORS) }) { Text("GitHub") }
+            }
+        }
+    }
+}
+
+/** The About section's links: donating, the chat room, and the source code. */
+@Composable
+internal fun AboutLinkRows() {
+    val context = LocalContext.current
+    val arrow = @Composable {
+        Icon(
+            Icons.AutoMirrored.Filled.KeyboardArrowRight,
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+    }
+    SettingsRow(
+        "Donate on GitHub Sponsors",
+        Modifier.clickable { GearslipLinks.open(context, GearslipLinks.SPONSORS) },
+        subtitle = "Give once or monthly, through GitHub",
+        icon = Icons.Filled.Favorite,
+        trailing = arrow,
+    )
+    SettingsDivider()
+    SettingsRow(
+        "Donate on Liberapay",
+        Modifier.clickable { GearslipLinks.open(context, GearslipLinks.LIBERAPAY) },
+        subtitle = "Give weekly or monthly, through a nonprofit",
+        icon = Icons.Filled.Favorite,
+        trailing = arrow,
+    )
+    SettingsDivider()
+    SettingsRow(
+        "Join the discussion on Matrix",
+        Modifier.clickable { GearslipLinks.open(context, GearslipLinks.MATRIX) },
+        subtitle = "Questions, ideas, or a car to report",
+        icon = Icons.AutoMirrored.Filled.Send,
+        trailing = arrow,
+    )
+    SettingsDivider()
+    SettingsRow(
+        "Source code",
+        Modifier.clickable { GearslipLinks.open(context, GearslipLinks.SOURCE) },
+        subtitle = "Read or change Gearslip's code under the AGPL",
+        icon = Icons.Filled.Build,
+        trailing = arrow,
+    )
+    SettingsDivider()
+    SettingsRow(
+        "Voice credits",
+        subtitle = "Speech recognition by sherpa-onnx (Apache 2.0), with Kroko ASR by Banafo " +
+            "(CC BY-SA 4.0), and Parakeet and Canary by NVIDIA (CC BY 4.0)",
+        icon = Icons.Filled.Favorite,
+    )
+}

gearslip/src/main/java/app/seb3thehacker/gearslip/ui/VoiceModelViews.kt

@@ -0,0 +1,125 @@
+package app.seb3thehacker.gearslip.ui
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.RadioButton
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.semantics.Role
+import androidx.compose.ui.unit.dp
+import app.seb3thehacker.gearslip.speech.SpeechModels
+import app.seb3thehacker.gearslip.speech.SpeechModels.Model
+import app.seb3thehacker.gearslip.speech.SpeechModels.State
+
+/**
+ * Which speech model the voice assistant listens with, and downloading it. Each is fetched once
+ * from sherpa-onnx's releases on GitHub; nothing is sent anywhere while listening.
+ */
+@Composable
+internal fun VoiceModelSection() {
+    val context = LocalContext.current
+    remember { SpeechModels.init(context) }
+    val selected by SpeechModels.selected.collectAsState()
+    val final by SpeechModels.final.collectAsState()
+    SettingsSection(title = "Voice: live words") {
+        Text(
+            "The voice assistant turns speech into text on this phone, and nothing you say leaves it. " +
+                "It needs two models, about 515 MB together, downloaded once. Use Wi-Fi if you can. " +
+                "This one writes your words as you speak.",
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 12.dp),
+        )
+        Model.entries.filter { it.role == SpeechModels.Role.LIVE }.forEachIndexed { i, model ->
+            if (i > 0) SettingsDivider()
+            ModelRow(model, model == selected)
+        }
+    }
+    SettingsSection(title = "Voice: final words") {
+        Text(
+            "When you stop talking, this model reads the whole phrase again. It catches names and " +
+                "places the live model misses.",
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 12.dp),
+        )
+        val context = LocalContext.current
+        Row(
+            Modifier
+                .fillMaxWidth()
+                .selectable(final == null, role = Role.RadioButton) { SpeechModels.selectFinal(context, null) }
+                .padding(horizontal = 8.dp, vertical = 8.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            RadioButton(final == null, onClick = null, modifier = Modifier.padding(8.dp))
+            Column {
+                Text("None", style = MaterialTheme.typography.titleMedium)
+                Text(
+                    "Keep the live words. Fastest, least accurate",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+        Model.entries.filter { it.role == SpeechModels.Role.FINAL }.forEach { model ->
+            SettingsDivider()
+            ModelRow(model, model == final)
+        }
+    }
+}
+
+@Composable
+private fun ModelRow(model: Model, chosen: Boolean) {
+    val context = LocalContext.current
+    val state by SpeechModels.state(model).collectAsState()
+    Column(
+        Modifier
+            .fillMaxWidth()
+            .selectable(chosen, role = Role.RadioButton) { SpeechModels.select(context, model) }
+            .padding(horizontal = 8.dp, vertical = 8.dp),
+    ) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            RadioButton(chosen, onClick = null, modifier = Modifier.padding(8.dp))
+            Column(Modifier.weight(1f)) {
+                Text("${model.label} · ${model.downloadMb} MB", style = MaterialTheme.typography.titleMedium)
+                Text(
+                    when (val s = state) {
+                        State.Ready -> "Downloaded. ${model.detail}"
+                        is State.Downloading -> "Downloading, ${s.percent}%"
+                        is State.Failed -> "Download failed: ${s.reason}"
+                        State.Missing -> model.detail
+                    },
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+                when (state) {
+                    State.Ready -> TextButton(onClick = { SpeechModels.delete(context, model) }) { Text("Delete") }
+                    is State.Downloading -> TextButton(onClick = { SpeechModels.delete(context, model) }) { Text("Cancel") }
+                    else -> OutlinedButton(onClick = { SpeechModels.download(context, model) }) { Text("Download") }
+                }
+            }
+        }
+        (state as? State.Downloading)?.let {
+            LinearProgressIndicator(
+                progress = { it.percent / 100f },
+                modifier = Modifier.fillMaxWidth().padding(start = 48.dp, end = 8.dp, top = 4.dp),
+            )
+        }
+    }
+}

gearslip/src/main/java/com/k2fsa/sherpa/onnx/FeatureConfig.kt

@@ -0,0 +1,12 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+package com.k2fsa.sherpa.onnx
+
+data class FeatureConfig(
+    var sampleRate: Int = 16000,
+    var featureDim: Int = 80,
+    var dither: Float = 0.0f
+)
+
+fun getFeatureConfig(sampleRate: Int, featureDim: Int): FeatureConfig {
+    return FeatureConfig(sampleRate = sampleRate, featureDim = featureDim)
+}

gearslip/src/main/java/com/k2fsa/sherpa/onnx/HomophoneReplacerConfig.kt

@@ -0,0 +1,8 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+package com.k2fsa.sherpa.onnx
+
+data class HomophoneReplacerConfig(
+    var dictDir: String = "", // unused
+    var lexicon: String = "",
+    var ruleFsts: String = "",
+)

gearslip/src/main/java/com/k2fsa/sherpa/onnx/OfflineRecognizer.kt

@@ -0,0 +1,255 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+// The JNI names are fixed to this package; the upstream catalog of pretrained models is left out.
+package com.k2fsa.sherpa.onnx
+
+import android.content.res.AssetManager
+
+data class OfflineRecognizerResult(
+    val text: String,
+    val tokens: Array<String>,
+    val timestamps: FloatArray,
+    val lang: String,
+    val emotion: String,
+    val event: String,
+
+    // valid only for TDT models
+    val durations: FloatArray,
+)
+
+data class OfflineTransducerModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+    var joiner: String = "",
+    var qnnConfig: QnnConfig = QnnConfig(),
+)
+
+data class OfflineParaformerModelConfig(
+    var model: String = "",
+    var qnnConfig: QnnConfig = QnnConfig(),
+)
+
+data class OfflineNemoEncDecCtcModelConfig(
+    var model: String = "",
+)
+
+data class OfflineDolphinModelConfig(
+    var model: String = "",
+)
+
+data class OfflineZipformerCtcModelConfig(
+    var model: String = "",
+    var qnnConfig: QnnConfig = QnnConfig(),
+)
+
+data class OfflineWenetCtcModelConfig(
+    var model: String = "",
+)
+
+data class OfflineOmnilingualAsrCtcModelConfig(
+    var model: String = "",
+)
+
+data class OfflineMedAsrCtcModelConfig(
+    var model: String = "",
+)
+
+data class OfflineFireRedAsrCtcModelConfig(
+    var model: String = "",
+)
+
+data class OfflineFunAsrNanoModelConfig(
+    var encoderAdaptor: String = "",
+    var llm: String = "",
+    var embedding: String = "",
+    var tokenizer: String = "",
+    var systemPrompt: String = "You are a helpful assistant.",
+    var userPrompt: String = "语音转写：",
+    var maxNewTokens: Int = 512,
+    var temperature: Float = 1e-6f,
+    var topP: Float = 0.8f,
+    var seed: Int = 42,
+    var language: String = "",
+    var itn: Boolean = true,
+    var hotwords: String = "",
+)
+
+data class OfflineQwen3AsrModelConfig(
+    var convFrontend: String = "",
+    var encoder: String = "",
+    var decoder: String = "",
+    var tokenizer: String = "",
+    var maxTotalLen: Int = 512,
+    var maxNewTokens: Int = 128,
+    var temperature: Float = 1e-6f,
+    var topP: Float = 0.8f,
+    var seed: Int = 42,
+    var hotwords: String = "",
+)
+
+data class OfflineWhisperModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+    var language: String = "en", // Used with multilingual model
+    var task: String = "transcribe", // transcribe or translate
+    var tailPaddings: Int = 1000, // Padding added at the end of the samples
+    var enableTokenTimestamps: Boolean = false,
+    var enableSegmentTimestamps: Boolean = false,
+)
+
+data class OfflineCanaryModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+    var srcLang: String = "en",
+    var tgtLang: String = "en",
+    var usePnc: Boolean = true,
+)
+
+data class OfflineCohereTranscribeModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+    var language: String = "",
+    var usePunct: Boolean = true,
+    var useItn: Boolean = true,
+)
+
+data class OfflineFireRedAsrModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+)
+
+// For moonshine v1, you need four models.
+// For moonshine v2, you need two models.
+// - v1: preprocessor, encoder, uncachedDecoder, cachedDecoder
+// - v2: encoder, mergedDecoder
+data class OfflineMoonshineModelConfig(
+    var preprocessor: String = "",
+    var encoder: String = "",
+    var uncachedDecoder: String = "",
+    var cachedDecoder: String = "",
+    var mergedDecoder: String = "",
+)
+
+data class OfflineSenseVoiceModelConfig(
+    var model: String = "",
+    var language: String = "",
+    var useInverseTextNormalization: Boolean = true,
+    var qnnConfig: QnnConfig = QnnConfig(),
+)
+
+data class OfflineModelConfig(
+    var transducer: OfflineTransducerModelConfig = OfflineTransducerModelConfig(),
+    var paraformer: OfflineParaformerModelConfig = OfflineParaformerModelConfig(),
+    var whisper: OfflineWhisperModelConfig = OfflineWhisperModelConfig(),
+    var fireRedAsr: OfflineFireRedAsrModelConfig = OfflineFireRedAsrModelConfig(),
+    var moonshine: OfflineMoonshineModelConfig = OfflineMoonshineModelConfig(),
+    var nemo: OfflineNemoEncDecCtcModelConfig = OfflineNemoEncDecCtcModelConfig(),
+    var senseVoice: OfflineSenseVoiceModelConfig = OfflineSenseVoiceModelConfig(),
+    var dolphin: OfflineDolphinModelConfig = OfflineDolphinModelConfig(),
+    var zipformerCtc: OfflineZipformerCtcModelConfig = OfflineZipformerCtcModelConfig(),
+    var wenetCtc: OfflineWenetCtcModelConfig = OfflineWenetCtcModelConfig(),
+    var omnilingual: OfflineOmnilingualAsrCtcModelConfig = OfflineOmnilingualAsrCtcModelConfig(),
+    var medasr: OfflineMedAsrCtcModelConfig = OfflineMedAsrCtcModelConfig(),
+    var funasrNano: OfflineFunAsrNanoModelConfig = OfflineFunAsrNanoModelConfig(),
+    var qwen3Asr: OfflineQwen3AsrModelConfig = OfflineQwen3AsrModelConfig(),
+    var fireRedAsrCtc: OfflineFireRedAsrCtcModelConfig = OfflineFireRedAsrCtcModelConfig(),
+    var canary: OfflineCanaryModelConfig = OfflineCanaryModelConfig(),
+    var cohereTranscribe: OfflineCohereTranscribeModelConfig =
+        OfflineCohereTranscribeModelConfig(),
+    var teleSpeech: String = "",
+    var numThreads: Int = 1,
+    var debug: Boolean = false,
+    var provider: String = "cpu",
+    var modelType: String = "",
+    var tokens: String = "",
+    var modelingUnit: String = "",
+    var bpeVocab: String = "",
+)
+
+data class OfflineRecognizerConfig(
+    var featConfig: FeatureConfig = FeatureConfig(),
+    var modelConfig: OfflineModelConfig = OfflineModelConfig(),
+    // var lmConfig: OfflineLMConfig(), // TODO(fangjun): enable it
+    var hr: HomophoneReplacerConfig = HomophoneReplacerConfig(),
+    var decodingMethod: String = "greedy_search",
+    var maxActivePaths: Int = 4,
+    var hotwordsFile: String = "",
+    var hotwordsScore: Float = 1.5f,
+    var ruleFsts: String = "",
+    var ruleFars: String = "",
+    var blankPenalty: Float = 0.0f,
+)
+
+class OfflineRecognizer(
+    assetManager: AssetManager? = null,
+    val config: OfflineRecognizerConfig,
+) {
+    private var ptr: Long
+
+    init {
+        ptr = if (assetManager != null) {
+            newFromAsset(assetManager, config)
+        } else {
+            newFromFile(config)
+        }
+        require(ptr != 0L) {
+            "Invalid OfflineRecognizerConfig: failed to create native OfflineRecognizer"
+        }
+    }
+
+    protected fun finalize() {
+        if (ptr != 0L) {
+            delete(ptr)
+            ptr = 0
+        }
+    }
+
+    fun release() = finalize()
+
+    fun createStream(): OfflineStream {
+        val p = createStream(ptr)
+        return OfflineStream(p)
+    }
+
+    fun createStream(hotwords: String): OfflineStream {
+        val p = createStreamWithHotwords(ptr, hotwords)
+        return OfflineStream(p)
+    }
+
+    fun getResult(stream: OfflineStream): OfflineRecognizerResult {
+        return getResult(stream.ptr)
+    }
+
+    fun decode(stream: OfflineStream) = decode(ptr, stream.ptr)
+
+    fun setConfig(config: OfflineRecognizerConfig) = setConfig(ptr, config)
+
+    private external fun delete(ptr: Long)
+
+    private external fun createStream(ptr: Long): Long
+
+    private external fun createStreamWithHotwords(ptr: Long, hotwords: String): Long
+
+    private external fun setConfig(ptr: Long, config: OfflineRecognizerConfig)
+
+    private external fun newFromAsset(
+        assetManager: AssetManager,
+        config: OfflineRecognizerConfig,
+    ): Long
+
+    private external fun newFromFile(
+        config: OfflineRecognizerConfig,
+    ): Long
+
+    private external fun decode(ptr: Long, streamPtr: Long)
+
+    private external fun getResult(streamPtr: Long): OfflineRecognizerResult
+
+    companion object {
+        init {
+            System.loadLibrary("sherpa-onnx-jni")
+        }
+
+        @JvmStatic
+        external fun prependAdspLibraryPath(newPath: String) // for qnn
+    }
+}

gearslip/src/main/java/com/k2fsa/sherpa/onnx/OfflineStream.kt

@@ -0,0 +1,43 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+package com.k2fsa.sherpa.onnx
+
+class OfflineStream(var ptr: Long) {
+    init {
+        require(ptr != 0L) { "Failed to create native OfflineStream" }
+    }
+
+    fun acceptWaveform(samples: FloatArray, sampleRate: Int) =
+        acceptWaveform(ptr, samples, sampleRate)
+
+    fun setOption(key: String, value: String) = setOption(ptr, key, value)
+
+    fun getOption(key: String): String = getOption(ptr, key)
+
+    protected fun finalize() {
+        if (ptr != 0L) {
+            delete(ptr)
+            ptr = 0
+        }
+    }
+
+    fun release() = finalize()
+
+    fun use(block: (OfflineStream) -> Unit) {
+        try {
+            block(this)
+        } finally {
+            release()
+        }
+    }
+
+    private external fun acceptWaveform(ptr: Long, samples: FloatArray, sampleRate: Int)
+    private external fun setOption(ptr: Long, key: String, value: String)
+    private external fun getOption(ptr: Long, key: String): String
+    private external fun delete(ptr: Long)
+
+    companion object {
+        init {
+            System.loadLibrary("sherpa-onnx-jni")
+        }
+    }
+}

gearslip/src/main/java/com/k2fsa/sherpa/onnx/OnlineRecognizer.kt

@@ -0,0 +1,158 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+// The JNI names are fixed to this package; the upstream catalog of pretrained models is left out.
+package com.k2fsa.sherpa.onnx
+
+import android.content.res.AssetManager
+
+data class EndpointRule(
+    var mustContainNonSilence: Boolean,
+    var minTrailingSilence: Float,
+    var minUtteranceLength: Float,
+)
+
+data class EndpointConfig(
+    var rule1: EndpointRule = EndpointRule(false, 2.4f, 0.0f),
+    var rule2: EndpointRule = EndpointRule(true, 1.4f, 0.0f),
+    var rule3: EndpointRule = EndpointRule(false, 0.0f, 20.0f)
+)
+
+data class OnlineTransducerModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+    var joiner: String = "",
+    var qnnConfig: QnnConfig = QnnConfig(),
+)
+
+data class OnlineParaformerModelConfig(
+    var encoder: String = "",
+    var decoder: String = "",
+)
+
+data class OnlineZipformer2CtcModelConfig(
+    var model: String = "",
+)
+
+data class OnlineNeMoCtcModelConfig(
+    var model: String = "",
+)
+
+data class OnlineToneCtcModelConfig(
+    var model: String = "",
+)
+
+data class OnlineModelConfig(
+    var transducer: OnlineTransducerModelConfig = OnlineTransducerModelConfig(),
+    var paraformer: OnlineParaformerModelConfig = OnlineParaformerModelConfig(),
+    var zipformer2Ctc: OnlineZipformer2CtcModelConfig = OnlineZipformer2CtcModelConfig(),
+    var neMoCtc: OnlineNeMoCtcModelConfig = OnlineNeMoCtcModelConfig(),
+    var toneCtc: OnlineToneCtcModelConfig = OnlineToneCtcModelConfig(),
+    var tokens: String = "",
+    var numThreads: Int = 1,
+    var debug: Boolean = false,
+    var provider: String = "cpu",
+    var modelType: String = "",
+    var modelingUnit: String = "",
+    var bpeVocab: String = "",
+)
+
+data class OnlineLMConfig(
+    var model: String = "",
+    var scale: Float = 0.5f,
+)
+
+data class OnlineCtcFstDecoderConfig(
+    var graph: String = "",
+    var maxActive: Int = 3000,
+)
+
+data class OnlineRecognizerConfig(
+    var featConfig: FeatureConfig = FeatureConfig(),
+    var modelConfig: OnlineModelConfig = OnlineModelConfig(),
+    var lmConfig: OnlineLMConfig = OnlineLMConfig(),
+    var ctcFstDecoderConfig: OnlineCtcFstDecoderConfig = OnlineCtcFstDecoderConfig(),
+    var hr: HomophoneReplacerConfig = HomophoneReplacerConfig(),
+    var endpointConfig: EndpointConfig = EndpointConfig(),
+    var enableEndpoint: Boolean = true,
+    var decodingMethod: String = "greedy_search",
+    var maxActivePaths: Int = 4,
+    var hotwordsFile: String = "",
+    var hotwordsScore: Float = 1.5f,
+    var ruleFsts: String = "",
+    var ruleFars: String = "",
+    var blankPenalty: Float = 0.0f,
+)
+
+data class OnlineRecognizerResult(
+    val text: String,
+    val tokens: Array<String>,
+    val timestamps: FloatArray,
+    val ysProbs: FloatArray,
+    // TODO(fangjun): Add more fields
+)
+
+class OnlineRecognizer(
+    assetManager: AssetManager? = null,
+    val config: OnlineRecognizerConfig,
+) {
+    private var ptr: Long
+
+    init {
+        ptr = if (assetManager != null) {
+            newFromAsset(assetManager, config)
+        } else {
+            newFromFile(config)
+        }
+        require(ptr != 0L) {
+            "Invalid OnlineRecognizerConfig: failed to create native OnlineRecognizer"
+        }
+    }
+
+    protected fun finalize() {
+        if (ptr != 0L) {
+            delete(ptr)
+            ptr = 0
+        }
+    }
+
+    fun release() = finalize()
+
+    fun createStream(hotwords: String = ""): OnlineStream {
+        val p = createStream(ptr, hotwords)
+        return OnlineStream(p)
+    }
+
+    fun reset(stream: OnlineStream) = reset(ptr, stream.ptr)
+    fun decode(stream: OnlineStream) = decode(ptr, stream.ptr)
+    fun isEndpoint(stream: OnlineStream) = isEndpoint(ptr, stream.ptr)
+    fun isReady(stream: OnlineStream) = isReady(ptr, stream.ptr)
+    fun getResult(stream: OnlineStream): OnlineRecognizerResult {
+        return getResult(ptr, stream.ptr)
+    }
+
+    private external fun delete(ptr: Long)
+
+    private external fun newFromAsset(
+        assetManager: AssetManager,
+        config: OnlineRecognizerConfig,
+    ): Long
+
+    private external fun newFromFile(
+        config: OnlineRecognizerConfig,
+    ): Long
+
+    private external fun createStream(ptr: Long, hotwords: String): Long
+    private external fun reset(ptr: Long, streamPtr: Long)
+    private external fun decode(ptr: Long, streamPtr: Long)
+    private external fun isEndpoint(ptr: Long, streamPtr: Long): Boolean
+    private external fun isReady(ptr: Long, streamPtr: Long): Boolean
+    private external fun getResult(ptr: Long, streamPtr: Long): OnlineRecognizerResult
+
+    companion object {
+        init {
+            System.loadLibrary("sherpa-onnx-jni")
+        }
+
+        @JvmStatic
+        external fun prependAdspLibraryPath(newPath: String) // for qnn
+    }
+}

gearslip/src/main/java/com/k2fsa/sherpa/onnx/OnlineStream.kt

@@ -0,0 +1,47 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+package com.k2fsa.sherpa.onnx
+
+class OnlineStream(var ptr: Long = 0) {
+    init {
+        require(ptr != 0L) { "Failed to create native OnlineStream" }
+    }
+
+    fun acceptWaveform(samples: FloatArray, sampleRate: Int) =
+        acceptWaveform(ptr, samples, sampleRate)
+
+    fun inputFinished() = inputFinished(ptr)
+
+    fun setOption(key: String, value: String) = setOption(ptr, key, value)
+
+    fun getOption(key: String): String = getOption(ptr, key)
+
+    protected fun finalize() {
+        if (ptr != 0L) {
+            delete(ptr)
+            ptr = 0
+        }
+    }
+
+    fun release() = finalize()
+
+    fun use(block: (OnlineStream) -> Unit) {
+        try {
+            block(this)
+        } finally {
+            release()
+        }
+    }
+
+    private external fun acceptWaveform(ptr: Long, samples: FloatArray, sampleRate: Int)
+    private external fun inputFinished(ptr: Long)
+    private external fun setOption(ptr: Long, key: String, value: String)
+    private external fun getOption(ptr: Long, key: String): String
+    private external fun delete(ptr: Long)
+
+
+    companion object {
+        init {
+            System.loadLibrary("sherpa-onnx-jni")
+        }
+    }
+}

gearslip/src/main/java/com/k2fsa/sherpa/onnx/QnnConfig.kt

@@ -0,0 +1,8 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+package com.k2fsa.sherpa.onnx
+
+data class QnnConfig(
+    var backendLib: String = "",
+    var contextBinary: String = "",
+    var systemLib: String = "",
+)

gearslip/src/main/res/drawable/ic_launcher_monochrome.xml

@@ -9,12 +9,10 @@
         android:fillColor="#FF000000"
         android:fillAlpha="0.35"/>
     <path
-        android:pathData="M 54.00,36.18 L 58.64,30.70 L 67.20,34.24 L 66.60,41.40 L 71.82,54.00 L 77.30,58.64 L 73.76,67.20 L 66.60,66.60 L 66.60,66.60 L 67.20,73.76 L 58.64,77.30 L 54.00,71.82 L 54.00,71.82 L 49.36,77.30 L 40.80,73.76 L 41.40,66.60 L 41.40,66.60 L 34.24,67.20 L 30.70,58.64 L 36.18,54.00 L 36.18,54.00 L 30.70,49.36 L 34.24,40.80 L 41.40,41.40 L 41.40,41.40 L 40.80,34.24 L 49.36,30.70 L 54.00,36.18 Z"
+        android:pathData="M 54.00,36.18 L 58.64,30.70 L 67.20,34.24 L 66.60,41.40 L 71.82,54.00 L 77.30,58.64 L 73.76,67.20 L 66.60,66.60 L 66.60,66.60 L 67.20,73.76 L 58.64,77.30 L 54.00,71.82 L 54.00,71.82 L 49.36,77.30 L 40.80,73.76 L 41.40,66.60 L 41.40,66.60 L 34.24,67.20 L 30.70,58.64 L 36.18,54.00 L 36.18,54.00 L 30.70,49.36 L 34.24,40.80 L 41.40,41.40 L 41.40,41.40 L 40.80,34.24 L 49.36,30.70 L 54.00,36.18 Z M54,46.08 A7.92,7.92 0 1,1 53.99,46.08 Z"
+        android:fillType="evenOdd"
         android:fillColor="#FF000000"/>
     <path
         android:pathData="M 78.61,40.70 L 85.31,43.29 L 84.74,52.55 L 77.78,54.31 Z"
         android:fillColor="#FF000000"/>
-    <path
-        android:pathData="M54,46.08 A7.92,7.92 0 1,1 53.99,46.08 Z"
-        android:fillColor="#00000000"/>
 </vector>

gradle/libs.versions.toml

@@ -14,6 +14,7 @@ material = "1.14.0"
 constraintlayout = "2.2.1"
 zxing = "3.5.4"
 okhttp = "5.4.0"
+commonsCompress = "1.28.0"
 kotlinxSerializationJson = "1.11.0"
 ossLicenses = "17.5.1"
 webkit = "1.16.0"
@@ -49,6 +50,7 @@ androidx-constraintlayout = { group = "androidx.constraintlayout", name = "const
 google-material = { group = "com.google.android.material", name = "material", version.ref = "material" }
 zxing-core = { group = "com.google.zxing", name = "core", version.ref = "zxing" }
 okhttp = { group = "com.squareup.okhttp3", name = "okhttp", version.ref = "okhttp" }
+commons-compress = { group = "org.apache.commons", name = "commons-compress", version.ref = "commonsCompress" }
 kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version.ref = "kotlinxSerializationJson" }
 google-oss-licenses = { group = "com.google.android.gms", name = "play-services-oss-licenses", version.ref = "ossLicenses" }
 androidx-webkit = { group = "androidx.webkit", name = "webkit", version.ref = "webkit" }