diff --git a/gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaScreen.kt b/gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaScreen.kt
index a45587f..6387133 100644
--- a/gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaScreen.kt
+++ b/gearslip/src/main/java/app/seb3thehacker/gearslip/car/MediaScreen.kt
@@ -418,9 +418,19 @@ internal fun LyricsPanel(
             val lines = state.result.lines
             val current = if (state.result.synced) lines.indexOfLast { it.timeMs <= position } else -1
             LaunchedEffect(current) {
-                if (current >= 0) list.animateScrollToItem((current - 1).coerceAtLeast(0))
+                val offset = if (app.seb3thehacker.gearslip.BuildConfig.DEBUG) 1 else 0
+                if (current >= 0) list.animateScrollToItem((current - 1 + offset).coerceAtLeast(0))
             }
             LazyColumn(modifier, state = list, verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                // Debug builds name the service the lyrics came from, to see which one answers.
+                if (app.seb3thehacker.gearslip.BuildConfig.DEBUG) item {
+                    val from = state.result.source.ifEmpty { "an older cache" }
+                    Text(
+                        "From $from · ${if (state.result.synced) "synced" else "plain"}",
+                        style = MaterialTheme.typography.labelMedium,
+                        color = MaterialTheme.colorScheme.tertiary,
+                    )
+                }
                 itemsIndexed(lines) { index, line ->
                     Text(
                         line.text.ifEmpty { " " },
diff --git a/gearslip/src/main/java/app/seb3thehacker/gearslip/media/Lyrics.kt b/gearslip/src/main/java/app/seb3thehacker/gearslip/media/Lyrics.kt
index f0fef75..9559d09 100644
--- a/gearslip/src/main/java/app/seb3thehacker/gearslip/media/Lyrics.kt
+++ b/gearslip/src/main/java/app/seb3thehacker/gearslip/media/Lyrics.kt
@@ -23,8 +23,11 @@ import kotlin.math.abs
 
 class LyricLine(val timeMs: Long, val text: String)
 
-/** [synced] means every line carries a time, so the current one can be followed along. */
-class LyricsResult(val lines: List<LyricLine>, val synced: Boolean)
+/**
+ * [synced] means every line carries a time, so the current one can be followed along. [source]
+ * names the service that had them, shown on debug builds.
+ */
+class LyricsResult(val lines: List<LyricLine>, val synced: Boolean, val source: String = "")
 
 /**
  * Looks lyrics up online, in the order Metrolist uses: BetterLyrics, then LRCLIB, then KuGou.
@@ -77,7 +80,7 @@ object Lyrics {
         var result: LyricsResult? = null
         for ((name, lookup) in sources) {
             val job = io.async { runCatching(lookup).onFailure { GearslipLog.w("lyrics: $name failed: ${it.message}") }.getOrNull() }
-            result = withTimeoutOrNull(SOURCE_TIMEOUT_MS) { job.await() }
+            result = withTimeoutOrNull(SOURCE_TIMEOUT_MS) { job.await() }?.let { LyricsResult(it.lines, it.synced, name) }
             if (result != null) {
                 GearslipLog.i("lyrics: found on $name (${if (result.synced) "synced" else "plain"})")
                 break
@@ -104,7 +107,7 @@ object Lyrics {
                 LyricLine(line.getLong("t"), line.getString("x"))
             }
         }
-        LyricsResult(lines, json.getBoolean("synced"))
+        LyricsResult(lines, json.getBoolean("synced"), json.optString("source"))
     }.getOrNull()
 
     private fun writeDisk(context: Context, key: String, result: LyricsResult) {
@@ -113,7 +116,7 @@ object Lyrics {
             result.lines.forEach { line ->
                 lines.put(JSONObject().put("t", line.timeMs).put("x", line.text))
             }
-            val json = JSONObject().put("synced", result.synced).put("lines", lines)
+            val json = JSONObject().put("synced", result.synced).put("source", result.source).put("lines", lines)
             cacheFile(context, key).writeText(json.toString())
         }.onFailure { GearslipLog.w("lyrics: could not write disk cache: ${it.message}") }
     }