diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt
index c59d95bd..2995a0a6 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt
@@ -24,6 +24,12 @@ object StreamController {
     private val main = Handler(Looper.getMainLooper())
     private val mutable = MutableStateFlow<StreamState?>(null)
     val state: StateFlow<StreamState?> = mutable
+    private val mutableTx = MutableStateFlow<StreamTxStats?>(null)
+    val txStats: StateFlow<StreamTxStats?> = mutableTx
+    fun updateTx(id: Long, data: LongArray) {
+        check(Looper.myLooper() == Looper.getMainLooper())
+        if (mutable.value?.id == id && mutable.value?.ongoing == true) mutableTx.value = StreamTxStats.fromNative(id, data)
+    }
     @Volatile var capturing = false
         private set
     private var service: StreamService? = null
@@ -38,6 +44,7 @@ object StreamController {
             mutable.value = StreamState(id, group, StreamPhase.FAILED, R.string.stream_resources_busy); return
         }
         capturing = true; mutable.value = StreamState(id, group, StreamPhase.STARTING, pendingConfig = config)
+        mutableTx.value = null
         try {
             ContextCompat.startForegroundService(ChatApplication.instance, Intent(ChatApplication.instance, StreamService::class.java)
                 .putExtra("id", id).putExtra("group", group).putExtra("audio", audio))
@@ -99,6 +106,7 @@ object StreamController {
         val st = mutable.value ?: return
         if (st.id != id || !st.ongoing) return
         capturing = false
+        mutableTx.value = null
         mutable.value = st.copy(phase = if (st.error != null) StreamPhase.FAILED else StreamPhase.ENDED, pendingConfig = null)
         LogManager.addLog("INFO", "stream", "publisher released id=$id")
     }
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt
index a8c89ecd..e6512931 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt
@@ -76,7 +76,13 @@ class StreamService : Service() {
             poll = scope.launch {
                 val deadline = System.nanoTime() + 10_000_000_000
                 var opened = false
+                var nextStats = 0L
                 while (true) {
+                    val now = System.nanoTime()
+                    if (now >= nextStats) {
+                        nextStats = now + 100_000_000
+                        NativeLib.streamTxStats(id)?.let { StreamController.updateTx(id, it) }
+                    }
                     val event = NativeLib.streamPull(id)
                     if (event != null) when (event[0].toInt()) {
                         4 -> { opened = true; StreamController.opened(id) }
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamTxStats.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamTxStats.kt
new file mode 100644
index 00000000..22a12164
--- /dev/null
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamTxStats.kt
@@ -0,0 +1,13 @@
+package com.utun.chat.data
+
+/** Все поля в байтах; ACK — десять завершённых интервалов по 100ms, для всех соединений ядра. */
+data class StreamTxStats(val id: Long, val sampleUs: Long, val videoBytes: Long, val audioBytes: Long,
+                         val streamBytes: Long, val transportBytes: Long, val inflightBytes: Long,
+                         val acked1s: Long, val totalBytes: Long, val connections: Long) {
+    companion object {
+        fun fromNative(id: Long, data: LongArray): StreamTxStats {
+            require(data.size == 9 && data.all { it >= 0 })
+            return StreamTxStats(id, data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8])
+        }
+    }
+}