diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 843b00f..879d934 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -78,27 +78,11 @@ android {
         versionName = "1.0.0"
     }
 
-    signingConfigs {
-        getByName("debug") {
-            storeFile = file("debug.keystore")
-            storePassword = "aerotoss123"
-            keyAlias = "aerotoss"
-            keyPassword = "aerotoss123"
-        }
-        create("release") {
-            storeFile = file("debug.keystore")
-            storePassword = "aerotoss123"
-            keyAlias = "aerotoss"
-            keyPassword = "aerotoss123"
-        }
-    }
-
     buildTypes {
         debug {
-            signingConfig = signingConfigs.getByName("debug")
+            isDebuggable = true
         }
         release {
-            signingConfig = signingConfigs.getByName("release")
             isMinifyEnabled = false
         }
     }
diff --git a/app/src/androidMain/kotlin/com/aerotoss/discovery/AndroidNsdDiscovery.kt b/app/src/androidMain/kotlin/com/aerotoss/discovery/AndroidNsdDiscovery.kt
index 5caf881..251663e 100644
--- a/app/src/androidMain/kotlin/com/aerotoss/discovery/AndroidNsdDiscovery.kt
+++ b/app/src/androidMain/kotlin/com/aerotoss/discovery/AndroidNsdDiscovery.kt
@@ -60,11 +60,13 @@ class AndroidNsdDiscovery(context: Context) : DiscoveryManager {
     private fun startServiceDiscovery() {
         discoveryListener = object : NsdManager.DiscoveryListener {
             override fun onDiscoveryStarted(serviceType: String) {
-                Log.d(TAG, "Discovery started")
+                Log.d(TAG, "Discovery started for type: $serviceType")
             }
 
             override fun onServiceFound(serviceInfo: NsdServiceInfo) {
-                if (serviceInfo.serviceType == SERVICE_TYPE &&
+                Log.d(TAG, "Service found: ${serviceInfo.serviceName} type=${serviceInfo.serviceType}")
+                val matchesType = serviceInfo.serviceType.contains("aerotoss")
+                if (matchesType &&
                     serviceInfo.serviceName != SERVICE_NAME &&
                     resolvingServices.add(serviceInfo.serviceName)
                 ) {
diff --git a/app/src/commonMain/kotlin/com/aerotoss/core/AeroTossManager.kt b/app/src/commonMain/kotlin/com/aerotoss/core/AeroTossManager.kt
index 5821dd3..23111ad 100644
--- a/app/src/commonMain/kotlin/com/aerotoss/core/AeroTossManager.kt
+++ b/app/src/commonMain/kotlin/com/aerotoss/core/AeroTossManager.kt
@@ -15,10 +15,19 @@ class AeroTossManager(
     val incomingTransfers: Flow<TransferProgress> = transfer.incomingTransfers
     val outgoingTransfers: Flow<TransferProgress> = transfer.outgoingTransfers
 
+    val serverPort: Int
+        get() = transfer.getServerPort()
+
     fun start(serverPort: Int) {
         discovery.startDiscovery(serverPort)
     }
 
+    fun rescan() {
+        val port = transfer.getServerPort()
+        discovery.stopDiscovery()
+        discovery.startDiscovery(port)
+    }
+
     suspend fun sendFile(file: File, target: Device): Flow<TransferProgress> {
         require(file.exists() && file.isFile) { "File does not exist or is not a regular file" }
         return transfer.sendFile(file, target.hostAddress, target.port)
diff --git a/app/src/commonMain/kotlin/com/aerotoss/ui/screens/HomeScreen.kt b/app/src/commonMain/kotlin/com/aerotoss/ui/screens/HomeScreen.kt
index 8d5dc4f..f87f534 100644
--- a/app/src/commonMain/kotlin/com/aerotoss/ui/screens/HomeScreen.kt
+++ b/app/src/commonMain/kotlin/com/aerotoss/ui/screens/HomeScreen.kt
@@ -36,6 +36,14 @@ fun HomeScreen(
             Row(
                 horizontalArrangement = Arrangement.spacedBy(16.dp)
             ) {
+                FloatingActionButton(
+                    onClick = {
+                        manager.rescan()
+                    },
+                    containerColor = MaterialTheme.colorScheme.tertiaryContainer
+                ) {
+                    Text("Обновить", style = MaterialTheme.typography.labelLarge)
+                }
                 FloatingActionButton(
                     onClick = onReceiveClick,
                     containerColor = MaterialTheme.colorScheme.secondaryContainer
@@ -70,20 +78,35 @@ fun HomeScreen(
                         )
                         Spacer(modifier = Modifier.height(16.dp))
                         CircularProgressIndicator()
+                        Spacer(modifier = Modifier.height(16.dp))
+                        OutlinedButton(
+                            onClick = { manager.rescan() }
+                        ) {
+                            Text("Сканировать заново")
+                        }
                         Spacer(modifier = Modifier.height(8.dp))
                         Text(
-                            "Убедитесь, что другое устройство\nтакже запустило AeroToss",
+                            "Убедитесь, что другое устройство\nтакже запустило AeroToss\nв одной Wi-Fi сети",
                             style = MaterialTheme.typography.bodySmall,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
                     }
                 }
             } else {
-                Text(
-                    "Найдено устройств: ${devices.size}",
-                    style = MaterialTheme.typography.titleSmall,
-                    color = MaterialTheme.colorScheme.onSurfaceVariant
-                )
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(
+                        "Найдено: ${devices.size}",
+                        style = MaterialTheme.typography.titleSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                    TextButton(onClick = { manager.rescan() }) {
+                        Text("Обновить")
+                    }
+                }
                 Spacer(modifier = Modifier.height(8.dp))
                 LazyColumn {
                     items(devices, key = { it.id }) { device ->
diff --git a/app/src/desktopMain/kotlin/com/aerotoss/discovery/JmdnsDiscovery.kt b/app/src/desktopMain/kotlin/com/aerotoss/discovery/JmdnsDiscovery.kt
index 1caa6ea..1827cd1 100644
--- a/app/src/desktopMain/kotlin/com/aerotoss/discovery/JmdnsDiscovery.kt
+++ b/app/src/desktopMain/kotlin/com/aerotoss/discovery/JmdnsDiscovery.kt
@@ -32,6 +32,7 @@ class JmdnsDiscovery : DiscoveryManager {
         discoveryThread = Thread {
             try {
                 val addr = findLocalAddress() ?: return@Thread
+                println("AeroToss: Starting mDNS on ${addr.hostAddress}")
                 jmdns = JmDNS.create(addr, "aerotoss-$deviceId")
 
                 val serviceInfo = ServiceInfo.create(
@@ -41,13 +42,16 @@ class JmdnsDiscovery : DiscoveryManager {
                     "path=/ aerotoss=1 id=$deviceId name=$deviceName"
                 )
                 jmdns?.registerService(serviceInfo)
+                println("AeroToss: Registered service on port $servicePort")
 
                 serviceListener = object : ServiceListener {
                     override fun serviceAdded(event: ServiceEvent) {
+                        println("AeroToss: Service added: ${event.name} type=${event.type}")
                         jmdns?.requestServiceInfo(event.type, event.name, true)
                     }
 
                     override fun serviceRemoved(event: ServiceEvent) {
+                        println("AeroToss: Service removed: ${event.name}")
                         discoveredDevices.remove(event.name)
                         _devices.value = discoveredDevices.values.toList()
                     }
@@ -55,6 +59,7 @@ class JmdnsDiscovery : DiscoveryManager {
                     override fun serviceResolved(event: ServiceEvent) {
                         val info = event.info
                         val hostAddresses = info.hostAddresses
+                        println("AeroToss: Service resolved: ${event.name} addresses=${hostAddresses.toList()}")
                         if (hostAddresses.isNotEmpty()) {
                             val attributes = info.textBytes?.let { parseAttributes(it) } ?: emptyMap()
                             val id = attributes["id"] ?: event.name
@@ -75,9 +80,15 @@ class JmdnsDiscovery : DiscoveryManager {
                 }
 
                 jmdns?.addServiceListener(SERVICE_TYPE, serviceListener)
+
+                // Also listen without the trailing dot for compatibility
+                jmdns?.addServiceListener("_aerotoss._tcp", serviceListener)
+
+                println("AeroToss: Listening for services on $SERVICE_TYPE")
                 Thread.currentThread().join()
             } catch (e: Exception) {
                 e.printStackTrace()
+                println("AeroToss: mDNS error: ${e.message}")
             }
         }.apply {
             isDaemon = true
@@ -91,6 +102,7 @@ class JmdnsDiscovery : DiscoveryManager {
         discoveryThread = null
         try {
             serviceListener?.let { jmdns?.removeServiceListener(SERVICE_TYPE, it) }
+            serviceListener?.let { jmdns?.removeServiceListener("_aerotoss._tcp", it) }
             jmdns?.unregisterAllServices()
             jmdns?.close()
         } catch (_: Exception) {
@@ -142,7 +154,7 @@ class JmdnsDiscovery : DiscoveryManager {
     }
 
     companion object {
-        const val SERVICE_TYPE = "_aerotoss._tcp.local."
+        const val SERVICE_TYPE = "_aerotoss._tcp."
         const val SERVICE_NAME = "AeroToss"
     }
 }