diff --git a/matrix-sdk-android/src/main/java/de/spiritcroc/matrixsdk/util/DbgUtil.kt b/matrix-sdk-android/src/main/java/de/spiritcroc/matrixsdk/util/DbgUtil.kt
index 2277329ebc..8f62b18900 100644
--- a/matrix-sdk-android/src/main/java/de/spiritcroc/matrixsdk/util/DbgUtil.kt
+++ b/matrix-sdk-android/src/main/java/de/spiritcroc/matrixsdk/util/DbgUtil.kt
@@ -7,6 +7,7 @@ import timber.log.Timber
 
 object DbgUtil {
     const val DBG_READ_MARKER = "DBG_READ_MARKER"
+    const val DBG_SHOW_READ_TRACKING = "DBG_SHOW_READ_TRACKING"
     const val DBG_TIMELINE_CHUNKS = "DBG_TIMELINE_CHUNKS"
     const val DBG_SHOW_DISPLAY_INDEX = "DBG_SHOW_DISPLAY_INDEX"
 
@@ -14,8 +15,9 @@ object DbgUtil {
 
     private val ALL_PREFS = arrayOf(
             DBG_READ_MARKER,
+            DBG_SHOW_READ_TRACKING,
             DBG_TIMELINE_CHUNKS,
-            DBG_SHOW_DISPLAY_INDEX
+            DBG_SHOW_DISPLAY_INDEX,
     )
 
     fun load(context: Context) {
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewEvents.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewEvents.kt
index d08a27324c..3b274bce91 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewEvents.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewEvents.kt
@@ -20,6 +20,7 @@ import android.net.Uri
 import android.view.View
 import im.vector.app.core.platform.VectorViewEvents
 import im.vector.app.features.call.webrtc.WebRtcCall
+import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
 import org.matrix.android.sdk.api.session.widgets.model.Widget
 import org.matrix.android.sdk.api.util.MatrixItem
 import org.matrix.android.sdk.internal.crypto.model.event.WithHeldCode
@@ -82,4 +83,6 @@ sealed class RoomDetailViewEvents : VectorViewEvents {
     data class StartChatEffect(val type: ChatEffect) : RoomDetailViewEvents()
     object StopChatEffects : RoomDetailViewEvents()
     object RoomReplacementStarted : RoomDetailViewEvents()
+
+    data class ScDbgReadTracking(val event: TimelineEvent?) : RoomDetailViewEvents()
 }
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineFragment.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineFragment.kt
index 5fa8a16812..77a6c6805d 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineFragment.kt
@@ -395,6 +395,8 @@ class TimelineFragment @Inject constructor(
         setupRemoveJitsiWidgetView()
         setupVoiceMessageView()
 
+        views.scRoomDebugView.isVisible = DbgUtil.isDbgEnabled(DbgUtil.DBG_SHOW_READ_TRACKING)
+
         views.includeRoomToolbar.roomToolbarContentView.debouncedClicks {
             navigator.openRoomProfile(requireActivity(), timelineArgs.roomId)
         }
@@ -494,6 +496,7 @@ class TimelineFragment @Inject constructor(
                 RoomDetailViewEvents.StopChatEffects                     -> handleStopChatEffects()
                 is RoomDetailViewEvents.DisplayAndAcceptCall             -> acceptIncomingCall(it)
                 RoomDetailViewEvents.RoomReplacementStarted              -> handleRoomReplacement()
+                is RoomDetailViewEvents.ScDbgReadTracking                -> handleScDbgReadTracking(it)
             }.exhaustive
         }
 
@@ -606,6 +609,10 @@ class TimelineFragment @Inject constructor(
         views.viewKonfetti.isInvisible = true
     }
 
+    private fun handleScDbgReadTracking(action: RoomDetailViewEvents.ScDbgReadTracking) {
+        views.scRoomDebugView.text = "Read: ${action.event?.eventId}/${action.event?.displayIndex}"
+    }
+
     override fun onImageReady(uri: Uri?) {
         uri ?: return
         timelineViewModel.handle(
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineViewModel.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineViewModel.kt
index 57e5d24399..a8e929e674 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/TimelineViewModel.kt
@@ -158,6 +158,12 @@ class TimelineViewModel @AssistedInject constructor(
 
     private var trackUnreadMessages = AtomicBoolean(false)
     private var mostRecentDisplayedEvent: TimelineEvent? = null
+        set(value) {
+            field = value
+            if (DbgUtil.isDbgEnabled(DbgUtil.DBG_SHOW_READ_TRACKING)) {
+                _viewEvents.post(RoomDetailViewEvents.ScDbgReadTracking(mostRecentDisplayedEvent))
+            }
+        }
 
     private var prepareToEncrypt: Async<Unit> = Uninitialized
 
diff --git a/vector/src/main/java/im/vector/app/features/settings/VectorSettingsScDebuggingFragment.kt b/vector/src/main/java/im/vector/app/features/settings/VectorSettingsScDebuggingFragment.kt
index 0aed4db83b..b9de9cda19 100644
--- a/vector/src/main/java/im/vector/app/features/settings/VectorSettingsScDebuggingFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/VectorSettingsScDebuggingFragment.kt
@@ -19,6 +19,7 @@ class VectorSettingsScDebuggingFragment @Inject constructor(
             DbgPref(DbgUtil.DBG_TIMELINE_CHUNKS, R.string.settings_sc_dbg_timeline_chunks),
             DbgPref(DbgUtil.DBG_SHOW_DISPLAY_INDEX, R.string.settings_sc_dbg_show_display_index),
             DbgPref(DbgUtil.DBG_READ_MARKER, R.string.settings_sc_dbg_read_marker),
+            DbgPref(DbgUtil.DBG_SHOW_READ_TRACKING, R.string.settings_sc_dbg_show_read_tracking),
     )
 
     override fun bindPref() {
diff --git a/vector/src/main/res/layout/fragment_timeline.xml b/vector/src/main/res/layout/fragment_timeline.xml
index d0984ca928..7b706044cc 100644
--- a/vector/src/main/res/layout/fragment_timeline.xml
+++ b/vector/src/main/res/layout/fragment_timeline.xml
@@ -52,6 +52,20 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/appBarLayout" />
 
+    <TextView
+        android:id="@+id/scRoomDebugView"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        style="@style/Widget.Vector.TextView.Caption"
+        android:layout_gravity="end|center_vertical"
+        android:fontFamily="monospace"
+        android:padding="2dp"
+        android:visibility="gone"
+        tools:text="SC-dbg"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/syncStateView" />
+
     <im.vector.app.features.call.conference.RemoveJitsiWidgetView
         android:id="@+id/removeJitsiWidgetView"
         android:layout_width="match_parent"
@@ -59,7 +73,7 @@
         android:background="?android:colorBackground"
         android:minHeight="54dp"
         android:visibility="visible"
-        app:layout_constraintTop_toBottomOf="@id/syncStateView" />
+        app:layout_constraintTop_toBottomOf="@id/scRoomDebugView" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/timelineRecyclerView"
diff --git a/vector/src/main/res/values/strings_sc.xml b/vector/src/main/res/values/strings_sc.xml
index 4240d16d2d..69a0882751 100644
--- a/vector/src/main/res/values/strings_sc.xml
+++ b/vector/src/main/res/values/strings_sc.xml
@@ -177,4 +177,5 @@
     <string name="settings_sc_dbg_read_marker">Debug read markers</string>
     <string name="settings_sc_dbg_timeline_chunks">Debug timeline consistency</string>
     <string name="settings_sc_dbg_show_display_index">Show displayIndex in timeline</string>
+    <string name="settings_sc_dbg_show_read_tracking">Show read tracking</string>
 </resources>