diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index 989d4c9..4f8e290 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -15,6 +15,10 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.TgWsProxy">
 
+        <activity
+            android:name=".LogViewerActivity"
+            android:exported="false" />
+
         <activity
             android:name=".MainActivity"
             android:exported="true">
diff --git a/android/app/src/main/java/org/flowseal/tgwsproxy/LogViewerActivity.kt b/android/app/src/main/java/org/flowseal/tgwsproxy/LogViewerActivity.kt
new file mode 100644
index 0000000..63af385
--- /dev/null
+++ b/android/app/src/main/java/org/flowseal/tgwsproxy/LogViewerActivity.kt
@@ -0,0 +1,53 @@
+package org.flowseal.tgwsproxy
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import org.flowseal.tgwsproxy.databinding.ActivityLogViewerBinding
+import java.io.File
+
+class LogViewerActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityLogViewerBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityLogViewerBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.refreshLogsButton.setOnClickListener { renderLog() }
+        binding.closeLogsButton.setOnClickListener { finish() }
+
+        renderLog()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        renderLog()
+    }
+
+    private fun renderLog() {
+        val logFile = File(filesDir, "tg-ws-proxy/proxy.log")
+        binding.logPathValue.text = logFile.absolutePath
+        binding.logContentValue.text = readLogTail(logFile)
+    }
+
+    private fun readLogTail(logFile: File, maxChars: Int = 40000): String {
+        if (!logFile.isFile) {
+            return getString(R.string.logs_empty)
+        }
+
+        val text = runCatching {
+            logFile.readText(Charsets.UTF_8)
+        }.getOrElse { error ->
+            return getString(R.string.logs_read_failed, error.message ?: error.javaClass.simpleName)
+        }
+
+        if (text.isBlank()) {
+            return getString(R.string.logs_empty)
+        }
+        if (text.length <= maxChars) {
+            return text
+        }
+
+        return getString(R.string.logs_truncated_prefix) + "\n\n" + text.takeLast(maxChars)
+    }
+}
diff --git a/android/app/src/main/java/org/flowseal/tgwsproxy/MainActivity.kt b/android/app/src/main/java/org/flowseal/tgwsproxy/MainActivity.kt
index 4768752..2a178b3 100644
--- a/android/app/src/main/java/org/flowseal/tgwsproxy/MainActivity.kt
+++ b/android/app/src/main/java/org/flowseal/tgwsproxy/MainActivity.kt
@@ -5,7 +5,6 @@ import android.content.Intent
 import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
-import android.provider.Settings
 import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
@@ -43,7 +42,9 @@ class MainActivity : AppCompatActivity() {
 
         binding.startButton.setOnClickListener { onStartClicked() }
         binding.stopButton.setOnClickListener { ProxyForegroundService.stop(this) }
+        binding.restartButton.setOnClickListener { onRestartClicked() }
         binding.saveButton.setOnClickListener { onSaveClicked(showMessage = true) }
+        binding.openLogsButton.setOnClickListener { onOpenLogsClicked() }
         binding.openTelegramButton.setOnClickListener { onOpenTelegramClicked() }
         binding.disableBatteryOptimizationButton.setOnClickListener {
             AndroidSystemStatus.openBatteryOptimizationSettings(this)
@@ -86,6 +87,16 @@ class MainActivity : AppCompatActivity() {
         Snackbar.make(binding.root, R.string.service_start_requested, Snackbar.LENGTH_SHORT).show()
     }
 
+    private fun onRestartClicked() {
+        onSaveClicked(showMessage = false) ?: return
+        ProxyForegroundService.restart(this)
+        Snackbar.make(binding.root, R.string.service_restart_requested, Snackbar.LENGTH_SHORT).show()
+    }
+
+    private fun onOpenLogsClicked() {
+        startActivity(Intent(this, LogViewerActivity::class.java))
+    }
+
     private fun onOpenTelegramClicked() {
         val config = onSaveClicked(showMessage = false) ?: return
         if (!TelegramProxyIntent.open(this, config)) {
@@ -127,6 +138,7 @@ class MainActivity : AppCompatActivity() {
                     )
                     binding.startButton.isEnabled = !isStarting && !isRunning
                     binding.stopButton.isEnabled = isStarting || isRunning
+                    binding.restartButton.isEnabled = !isStarting
                 }
             }
         }
@@ -162,13 +174,10 @@ class MainActivity : AppCompatActivity() {
             repeatOnLifecycle(Lifecycle.State.STARTED) {
                 ProxyServiceState.lastError.collect { error ->
                     if (error.isNullOrBlank()) {
-                        if (!binding.errorText.isVisible) {
-                            return@collect
-                        }
-                        binding.errorText.isVisible = false
+                        binding.lastErrorCard.isVisible = false
                     } else {
-                        binding.errorText.text = error
-                        binding.errorText.isVisible = true
+                        binding.lastErrorValue.text = error
+                        binding.lastErrorCard.isVisible = true
                     }
                 }
             }
diff --git a/android/app/src/main/java/org/flowseal/tgwsproxy/ProxyForegroundService.kt b/android/app/src/main/java/org/flowseal/tgwsproxy/ProxyForegroundService.kt
index 8e5bb25..1e888ba 100644
--- a/android/app/src/main/java/org/flowseal/tgwsproxy/ProxyForegroundService.kt
+++ b/android/app/src/main/java/org/flowseal/tgwsproxy/ProxyForegroundService.kt
@@ -43,33 +43,24 @@ class ProxyForegroundService : Service() {
                 START_NOT_STICKY
             }
 
-            else -> {
-                val config = settingsStore.load().validate().normalized
-                if (config == null) {
-                    ProxyServiceState.markFailed(getString(R.string.saved_config_invalid))
-                    stopForeground(STOP_FOREGROUND_REMOVE)
-                    stopSelf()
-                    START_NOT_STICKY
-                } else {
-                    ProxyServiceState.markStarting(config)
-                    startForeground(
-                        NOTIFICATION_ID,
-                        buildNotification(
-                            buildNotificationPayload(
-                                config = config,
-                                statusText = getString(
-                                    R.string.notification_starting,
-                                    config.host,
-                                    config.port,
-                                ),
-                            ),
-                        ),
-                    )
-                    serviceScope.launch {
-                        startProxyRuntime(config)
-                    }
-                    START_STICKY
+            ACTION_RESTART -> {
+                val config = loadValidatedConfig() ?: return START_NOT_STICKY
+                ProxyServiceState.clearError()
+                beginProxyStart(config)
+                serviceScope.launch {
+                    stopRuntimeOnly()
+                    startProxyRuntime(config)
                 }
+                START_STICKY
+            }
+
+            else -> {
+                val config = loadValidatedConfig() ?: return START_NOT_STICKY
+                beginProxyStart(config)
+                serviceScope.launch {
+                    startProxyRuntime(config)
+                }
+                START_STICKY
             }
         }
     }
@@ -133,9 +124,36 @@ class ProxyForegroundService : Service() {
         }
     }
 
+    private fun loadValidatedConfig(): NormalizedProxyConfig? {
+        val config = settingsStore.load().validate().normalized
+        if (config == null) {
+            ProxyServiceState.markFailed(getString(R.string.saved_config_invalid))
+            stopForeground(STOP_FOREGROUND_REMOVE)
+            stopSelf()
+        }
+        return config
+    }
+
+    private fun beginProxyStart(config: NormalizedProxyConfig) {
+        ProxyServiceState.markStarting(config)
+        startForeground(
+            NOTIFICATION_ID,
+            buildNotification(
+                buildNotificationPayload(
+                    config = config,
+                    trafficState = TrafficState(),
+                    statusText = getString(
+                        R.string.notification_starting,
+                        config.host,
+                        config.port,
+                    ),
+                ),
+            ),
+        )
+    }
+
     private fun stopProxyRuntime(removeNotification: Boolean, stopService: Boolean) {
-        stopTrafficUpdates()
-        runCatching { PythonProxyBridge.stop(this) }
+        stopRuntimeOnly()
         ProxyServiceState.markStopped()
 
         if (removeNotification) {
@@ -146,6 +164,11 @@ class ProxyForegroundService : Service() {
         }
     }
 
+    private fun stopRuntimeOnly() {
+        stopTrafficUpdates()
+        runCatching { PythonProxyBridge.stop(this) }
+    }
+
     private fun updateNotification(payload: NotificationPayload) {
         val manager = getSystemService(NotificationManager::class.java)
         manager.notify(NOTIFICATION_ID, buildNotification(payload))
@@ -153,9 +176,9 @@ class ProxyForegroundService : Service() {
 
     private fun buildNotificationPayload(
         config: NormalizedProxyConfig,
+        trafficState: TrafficState,
         statusText: String,
     ): NotificationPayload {
-        val trafficState = readTrafficState()
         val endpointText = getString(R.string.notification_endpoint, config.host, config.port)
         val detailsText = getString(
             R.string.notification_details,
@@ -176,9 +199,19 @@ class ProxyForegroundService : Service() {
         stopTrafficUpdates()
         trafficJob = serviceScope.launch {
             while (isActive && ProxyServiceState.isRunning.value) {
+                val trafficState = readTrafficState()
+                if (!trafficState.running) {
+                    ProxyServiceState.markFailed(
+                        trafficState.lastError ?: getString(R.string.proxy_runtime_stopped_unexpectedly),
+                    )
+                    stopForeground(STOP_FOREGROUND_REMOVE)
+                    stopSelf()
+                    break
+                }
                 updateNotification(
                     buildNotificationPayload(
                         config = config,
+                        trafficState = trafficState,
                         statusText = getString(
                             R.string.notification_running,
                             config.host,
@@ -213,6 +246,8 @@ class ProxyForegroundService : Service() {
                 downBytesPerSecond = 0L,
                 totalBytesUp = current.bytesUp,
                 totalBytesDown = current.bytesDown,
+                running = current.running,
+                lastError = current.lastError,
             )
         }
 
@@ -224,6 +259,8 @@ class ProxyForegroundService : Service() {
             downBytesPerSecond = (downDelta * 1000L) / elapsedMillis,
             totalBytesUp = current.bytesUp,
             totalBytesDown = current.bytesDown,
+            running = current.running,
+            lastError = current.lastError,
         )
     }
 
@@ -310,6 +347,7 @@ class ProxyForegroundService : Service() {
         private const val NOTIFICATION_ID = 1001
         private const val ACTION_START = "org.flowseal.tgwsproxy.action.START"
         private const val ACTION_STOP = "org.flowseal.tgwsproxy.action.STOP"
+        private const val ACTION_RESTART = "org.flowseal.tgwsproxy.action.RESTART"
 
         fun start(context: Context) {
             val intent = Intent(context, ProxyForegroundService::class.java).apply {
@@ -324,6 +362,13 @@ class ProxyForegroundService : Service() {
             }
             context.startService(intent)
         }
+
+        fun restart(context: Context) {
+            val intent = Intent(context, ProxyForegroundService::class.java).apply {
+                action = ACTION_RESTART
+            }
+            androidx.core.content.ContextCompat.startForegroundService(context, intent)
+        }
     }
 }
 
@@ -340,8 +385,10 @@ private data class TrafficSample(
 )
 
 private data class TrafficState(
-    val upBytesPerSecond: Long,
-    val downBytesPerSecond: Long,
-    val totalBytesUp: Long,
-    val totalBytesDown: Long,
+    val upBytesPerSecond: Long = 0L,
+    val downBytesPerSecond: Long = 0L,
+    val totalBytesUp: Long = 0L,
+    val totalBytesDown: Long = 0L,
+    val running: Boolean = false,
+    val lastError: String? = null,
 )
diff --git a/android/app/src/main/java/org/flowseal/tgwsproxy/PythonProxyBridge.kt b/android/app/src/main/java/org/flowseal/tgwsproxy/PythonProxyBridge.kt
index 95c95fd..55ff549 100644
--- a/android/app/src/main/java/org/flowseal/tgwsproxy/PythonProxyBridge.kt
+++ b/android/app/src/main/java/org/flowseal/tgwsproxy/PythonProxyBridge.kt
@@ -39,6 +39,7 @@ object PythonProxyBridge {
             bytesUp = json.optLong("bytes_up", 0L),
             bytesDown = json.optLong("bytes_down", 0L),
             running = json.optBoolean("running", false),
+            lastError = json.optString("last_error").ifBlank { null },
         )
     }
 
@@ -57,4 +58,5 @@ data class ProxyTrafficStats(
     val bytesUp: Long = 0L,
     val bytesDown: Long = 0L,
     val running: Boolean = false,
+    val lastError: String? = null,
 )
diff --git a/android/app/src/main/python/android_proxy_bridge.py b/android/app/src/main/python/android_proxy_bridge.py
index c1dc246..910d1fb 100644
--- a/android/app/src/main/python/android_proxy_bridge.py
+++ b/android/app/src/main/python/android_proxy_bridge.py
@@ -118,4 +118,5 @@ def get_runtime_stats_json() -> str:
 
     payload = dict(tg_ws_proxy.get_stats_snapshot())
     payload["running"] = running
+    payload["last_error"] = _LAST_ERROR
     return json.dumps(payload)
diff --git a/android/app/src/main/res/layout/activity_log_viewer.xml b/android/app/src/main/res/layout/activity_log_viewer.xml
new file mode 100644
index 0000000..5880535
--- /dev/null
+++ b/android/app/src/main/res/layout/activity_log_viewer.xml
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fillViewport="true">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="20dp">
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/logs_title"
+            android:textAppearance="@style/TextAppearance.Material3.HeadlineSmall"
+            android:textStyle="bold" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/logs_subtitle"
+            android:textAppearance="@style/TextAppearance.Material3.BodyMedium" />
+
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            app:cardCornerRadius="20dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="18dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/logs_path_label"
+                    android:textAppearance="@style/TextAppearance.Material3.LabelLarge" />
+
+                <TextView
+                    android:id="@+id/logPathValue"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:textAppearance="@style/TextAppearance.Material3.BodySmall" />
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            app:cardCornerRadius="20dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="18dp">
+
+                <TextView
+                    android:id="@+id/logContentValue"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:fontFamily="monospace"
+                    android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+                    android:textIsSelectable="true" />
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/refreshLogsButton"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/refresh_logs_button" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/closeLogsButton"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/close_logs_button" />
+
+    </LinearLayout>
+</ScrollView>
diff --git a/android/app/src/main/res/layout/activity_main.xml b/android/app/src/main/res/layout/activity_main.xml
index e1dad84..ead3c2a 100644
--- a/android/app/src/main/res/layout/activity_main.xml
+++ b/android/app/src/main/res/layout/activity_main.xml
@@ -64,6 +64,37 @@
             </LinearLayout>
         </com.google.android.material.card.MaterialCardView>
 
+        <com.google.android.material.card.MaterialCardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:id="@+id/lastErrorCard"
+            android:visibility="gone"
+            app:cardCornerRadius="20dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="18dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/last_error_label"
+                    android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+                    android:textColor="?attr/colorError" />
+
+                <TextView
+                    android:id="@+id/lastErrorValue"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
+                    android:textColor="?attr/colorError" />
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
         <com.google.android.material.card.MaterialCardView
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -199,6 +230,14 @@
             android:enabled="false"
             android:text="@string/stop_button" />
 
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/restartButton"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/restart_button" />
+
         <com.google.android.material.button.MaterialButton
             android:id="@+id/openTelegramButton"
             style="@style/Widget.Material3.Button.OutlinedButton"
@@ -207,5 +246,13 @@
             android:layout_marginTop="12dp"
             android:text="@string/open_telegram_button" />
 
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/openLogsButton"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/open_logs_button" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 7795a5f..5a3ef8c 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -24,11 +24,15 @@
     <string name="save_button">Save Settings</string>
     <string name="start_button">Start Service</string>
     <string name="stop_button">Stop Service</string>
+    <string name="restart_button">Restart Proxy</string>
     <string name="open_telegram_button">Open in Telegram</string>
+    <string name="open_logs_button">Open Logs</string>
     <string name="disable_battery_optimization_button">Disable Battery Optimization</string>
     <string name="open_app_settings_button">Open App Settings</string>
+    <string name="last_error_label">Last service error</string>
     <string name="settings_saved">Settings saved</string>
     <string name="service_start_requested">Foreground service start requested</string>
+    <string name="service_restart_requested">Foreground service restart requested</string>
     <string name="telegram_not_found">Telegram app was not found for tg://socks.</string>
     <string name="notification_title">TG WS Proxy</string>
     <string name="notification_channel_name">Proxy service</string>
@@ -40,4 +44,13 @@
     <string name="notification_action_stop">Stop</string>
     <string name="saved_config_invalid">Saved proxy settings are invalid.</string>
     <string name="proxy_start_failed_generic">Failed to start embedded Python proxy.</string>
+    <string name="proxy_runtime_stopped_unexpectedly">Proxy runtime stopped unexpectedly.</string>
+    <string name="logs_title">Proxy Logs</string>
+    <string name="logs_subtitle">Shows the latest lines from the embedded Python proxy log.</string>
+    <string name="logs_path_label">Log file</string>
+    <string name="refresh_logs_button">Refresh Logs</string>
+    <string name="close_logs_button">Close</string>
+    <string name="logs_empty">The log file is empty or has not been created yet.</string>
+    <string name="logs_read_failed">Failed to read log file: %1$s</string>
+    <string name="logs_truncated_prefix">Showing the last part of the log file.</string>
 </resources>
diff --git a/tests/test_android_proxy_bridge.py b/tests/test_android_proxy_bridge.py
index 2d314e7..d7f159b 100644
--- a/tests/test_android_proxy_bridge.py
+++ b/tests/test_android_proxy_bridge.py
@@ -26,6 +26,7 @@ class FakeJavaArrayList:
 class AndroidProxyBridgeTests(unittest.TestCase):
     def tearDown(self):
         tg_ws_proxy.reset_stats()
+        android_proxy_bridge._LAST_ERROR = None
 
     def test_normalize_dc_ip_list_with_python_iterable(self):
         result = android_proxy_bridge._normalize_dc_ip_list([
@@ -52,6 +53,14 @@ class AndroidProxyBridgeTests(unittest.TestCase):
         self.assertEqual(result["bytes_up"], 1536)
         self.assertEqual(result["bytes_down"], 4096)
         self.assertFalse(result["running"])
+        self.assertIsNone(result["last_error"])
+
+    def test_get_runtime_stats_json_includes_last_error(self):
+        android_proxy_bridge._LAST_ERROR = "boom"
+
+        result = json.loads(android_proxy_bridge.get_runtime_stats_json())
+
+        self.assertEqual(result["last_error"], "boom")
 
     def test_normalize_dc_ip_list_with_java_array_list_shape(self):
         result = android_proxy_bridge._normalize_dc_ip_list(FakeJavaArrayList([