diff --git a/CARS.md b/CARS.md
new file mode 100644
index 0000000..3a8c992
--- /dev/null
+++ b/CARS.md
@@ -0,0 +1,49 @@
+# Cars
+
+Drivers who share usage notes tell us which cars Gearslip works in. This list comes from
+those notes, and from our own testing. A car shows up here once Gearslip has reached its
+screen at least once.
+
+The year is the one the car reports. Some cars report the year of the head unit instead,
+and some don't say.
+
+## Works
+
+| Car | Year | Head unit |
+|---|---|---|
+| Audi | | MIB2+ (Alpine) |
+| Audi | | Harman |
+| Chevrolet, with myChevrolet | 2019, 2020, 2021 | myChevrolet |
+| Chevrolet, with MyLink | 2017 | MyLink |
+| Dacia | | Media Nav (LG ULC 4.1) |
+| Dacia | | LG ULC 4.5 |
+| Ford | 2018 | SYNC 3.0 (Panasonic) |
+| Ford Fiesta | 2019 | SYNC 3.2 (Panasonic) |
+| Ford Fusion | 2018 | SYNC 3.1 (Panasonic) |
+| Jeep Cherokee | 2019 | Uconnect 8.4 (Delphi) |
+| MG | 2019 | Desay SV |
+| Ram 1500 | 2018 | Uconnect 8.4 (Panasonic) |
+| Škoda | 2018 | MIB Standard2 (TechniSat) |
+| Subaru Outback | 2020 | Denso |
+| Toyota RAV4 | 2020 | Pioneer T1 |
+| Volkswagen | 2018 | MIB Standard2 (Delphi) |
+| Volkswagen | 2024 | ICAS3 |
+| Volvo XC90 | 2022 | SPA Plus (Mitsubishi Electric) |
+| Wuling | 2021 | Desay SV |
+| [LIVI](https://github.com/f-io/LIVI), the open-source head unit | | |
+
+## Not working yet
+
+| Car | Year | What happens |
+|---|---|---|
+| Honda | 2016 | The connection drops before Gearslip reaches the screen. |
+| Honda | 2019 | The connection drops before Gearslip reaches the screen. |
+| Mitsubishi Attrage | 2020 | The connection drops before Gearslip reaches the screen. |
+
+Some cars reject Gearslip's certificate before they say what they are, so they can't appear
+here by name. Most of these are from around 2020 or later.
+
+## Add your car
+
+Turn on usage notes in Gearslip's setup or Settings, and drive once. If your car is missing
+or listed wrongly, open an issue.
diff --git a/README.md b/README.md
index c448b8e..ee9845d 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,8 @@ An Android Auto alternative built for everyone.
 ## Which cars work
 
 Most cars work. Starting around 2020, some cars added newer security standards that reject
-Gearslip's certificate, and Gearslip can't run in those cars.
+Gearslip's certificate, and Gearslip can't run in those cars. [CARS.md](CARS.md) lists the
+cars drivers have confirmed.
 
 ## What Gearslip is
 
diff --git a/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AboutLinks.kt b/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AboutLinks.kt
index 943d58e..c2ea293 100644
--- a/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AboutLinks.kt
+++ b/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/AboutLinks.kt
@@ -19,6 +19,7 @@ import androidx.compose.ui.platform.LocalContext
 internal object GearslipLinks {
     const val MATRIX = "https://matrix.to/#/!mf0_mgBd5KqKpc9FfX_wHp1jFCcwAtPrndIn_oGIyMk?via=matrix.org"
     const val SOURCE = "https://github.com/Seb3thehacker/gearslip"
+    const val CARS = "$SOURCE/blob/main/CARS.md"
 
     fun open(context: Context, url: String) {
         runCatching {
diff --git a/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/HelpScreen.kt b/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/HelpScreen.kt
index c34ec5a..f2152b9 100644
--- a/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/HelpScreen.kt
+++ b/gearslip/src/main/java/app/seb3thehacker/gearslip/ui/HelpScreen.kt
@@ -28,6 +28,7 @@ import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 
@@ -97,6 +98,7 @@ private val USB_AUDIO = listOf(
 fun HelpScreen(onBack: () -> Unit, onRequestCallScreening: () -> Unit) {
     val car = remember(onRequestCallScreening) { inTheCar(onRequestCallScreening) }
     val usb by CarSettings.pipeAudio.collectAsState()
+    val context = LocalContext.current
 
     Scaffold(
         containerColor = MaterialTheme.colorScheme.background,
@@ -125,8 +127,12 @@ fun HelpScreen(onBack: () -> Unit, onRequestCallScreening: () -> Unit) {
                     "Most cars work. Starting around 2020, some cars added newer security " +
                         "standards that reject Gearslip's certificate, and Gearslip can't run in those cars.",
                     style = MaterialTheme.typography.bodyLarge,
-                    modifier = Modifier.padding(16.dp),
+                    modifier = Modifier.padding(start = 16.dp, end = 16.dp, top = 16.dp),
                 )
+                FilledTonalButton(
+                    onClick = { GearslipLinks.open(context, GearslipLinks.CARS) },
+                    modifier = Modifier.padding(16.dp),
+                ) { Text("See the full list") }
             }
             Steps("Before your first drive", FIRST_DRIVE)
             Steps("In the car", car)