diff --git a/GUI/src/funcs/sync_dll_service.py b/GUI/src/funcs/sync_dll_service.py
index a4b51b3..6e2190d 100644
--- a/GUI/src/funcs/sync_dll_service.py
+++ b/GUI/src/funcs/sync_dll_service.py
@@ -12,7 +12,7 @@ def __init__(self) -> None:
         self.__magnetDll:ctypes.CDLL = None
 
     def LoadMagnetDll(self) -> bool:
-        """ Dll dosyasının varlığını kontrol et """
+        """ Check for exist of dll file"""
 
         if os.path.exists(self._dllPath):
             return True
@@ -20,7 +20,7 @@ def LoadMagnetDll(self) -> bool:
             return False
 
     def ManageDllStarted(self):
-        """ Server'i Başlat """
+        """ Start to server"""
         try:
             self.__magnetDll = ctypes.CDLL(name=self._dllPath)
         except FileNotFoundError:
@@ -30,10 +30,11 @@ def ManageDllStarted(self):
             self.__magnetDll.StartServer()
 
     def ManageDllFinished(self):
+        "Stop to server"
         self.__magnetDll.CloseServer()
     
     def SelectSendDllFilePath(self, sendListWidget: SyncListWidget):
-        """ DOSYALARI GÖNDER """
+        """ Files send """
         
         file_info_list = []
         for i in range(sendListWidget.count()):
@@ -56,18 +57,17 @@ def HandleFileTransfer(cls):
         return cls.__magnetDll.HandleFileTransfer()
     
     def GetCurrentDownloadFileSize(self) -> int:
-        """ şuan indirilen dosyanin boyutu (byte)"""
+        """ Size of the currently downloaded file (bytes)"""
 
         return self.__magnetDll.GetCurrentDownloadFileSize()
     
     def GetCurrentTotalDownloadFileSize(self) -> int:
-        """ şuan indirilecek dosyanin toplam boyutu (byte)"""
+        """ Total size the file to will download now (byte)"""
 
         return self.__magnetDll.GetCurrentTotalDownloadFileSize()
 
     def GetIsLoadFile(self):
-        """ şuan dosya indiriliyorsa True indirilmiyorsa False """
-
+        """ True if the file is downloading now, if not downloading file is False"""
         return self.__magnetDll.GetIsLoadFile()
 
     def GetIsDownloadCompletedFile(self) -> bool:
@@ -75,7 +75,7 @@ def GetIsDownloadCompletedFile(self) -> bool:
         return self.__magnetDll.GetIsDownloadCompletedFile()
 
     def CanGetDeviceState(self) -> bool:
-        """dosya gönderiliyor mu gönderiliyorsa True gönderilmiyorsa False"""
+        """is the file sending,True if file sending if not send file is false."""
         return self.__magnetDll.CanGetDeviceState()
 
     def GetDeviceBatteryStatus(self):
@@ -86,9 +86,13 @@ def SetCanDeviceState(self,state: bool):
 
     def SetTransferMode(self,mode: bool):
         self.__magnetDll.SetTransferMode(mode)
+    
+    def GetonDisconnectDevice(self) -> bool:
+        "Is connection closed?"
+        return self.__magnetDll.GetonDisconnectDevice()
 
     def formatSize(self,byte) -> str:
-        """ Dosya boyutu birim dönüşümü """
+        """ file size conversion"""
 
         if byte < 1024:
             return f"{byte} B"
diff --git a/GUI/src/funcs/sync_workers.py b/GUI/src/funcs/sync_workers.py
index 0f38417..fe2bfc0 100644
--- a/GUI/src/funcs/sync_workers.py
+++ b/GUI/src/funcs/sync_workers.py
@@ -45,7 +45,6 @@ def start(self) -> None:
                     device_battery = int(device.attrib["device_battery"])
                     self.connectGetClientInfo.emit({"device_name":device_name,"device_battery":device_battery})
                     __DLL_SERVICE__.GetDeviceBatteryStatus()
-
                 except Exception as E:
                     print("SyncClientInfoWorker ERROR: ",E)
                     pass
@@ -53,7 +52,6 @@ def start(self) -> None:
                 finally:
                     # print("SyncClientInfoWorker START")
                     sleep(0.6)
-            sleep(0.6)
 # ##### ===> SyncClientInfoWorker
 
 # ##### ===> SyncFileSenderWorker
@@ -189,4 +187,22 @@ def checkStart(self):
                 self.checkNet.emit(False)
             finally:
                 sleep(0.1)
-# #### ====> SyncCheckNetWorker
\ No newline at end of file
+# #### ====> SyncCheckNetWorker
+
+# #### ====> SyncOnClientDisconnectWorker
+class SyncOnClientDisconnectWorker(QObject):
+    onDisconnect = pyqtSignal(bool)
+    def __init__(self) -> None:
+        super().__init__()
+        self.__run = True
+    
+    def setRunState(self,newRunState: bool):
+        self.__run = newRunState
+    
+    def disconnectListen(self):
+        while self.__run:
+            state = __DLL_SERVICE__.GetonDisconnectDevice()
+            print("GetonDisconnectDevice -> ",state)
+            self.onDisconnect.emit(state)
+            sleep(0.6)
+# #### ====> SyncOnClientDisconnectWorker
\ No newline at end of file
diff --git a/GUI/src/pages/sync_server_page.py b/GUI/src/pages/sync_server_page.py
index 60bdeac..964f1a7 100644
--- a/GUI/src/pages/sync_server_page.py
+++ b/GUI/src/pages/sync_server_page.py
@@ -12,6 +12,7 @@
 from src.funcs.sync_workers     import SyncProcessRunWorker
 from src.funcs.sync_workers     import SyncFileDownloadWorker
 from src.funcs.sync_workers     import SyncLoadFileListener
+from src.funcs.sync_workers     import SyncOnClientDisconnectWorker
 from src.pages.sync_load_page   import LoadWindow
 from src.widgets                import SyncListWidget
 from src.widgets                import SyncTableWidget
@@ -936,6 +937,19 @@ def connectedButtons(self):
         self.getInfoWorker.connectGetClientInfo.connect(self.getClientInfo)
         self.frame_top_btns.mouseDoubleClickEvent = self.doubleClickMaximizeRestore
 
+        self.getOnClientDisconnectWorker = SyncOnClientDisconnectWorker()
+        self.getOnClientDisconnectThread = QThread(self)
+        self.getOnClientDisconnectWorker.moveToThread(self.getOnClientDisconnectThread)
+        self.getOnClientDisconnectThread.started.connect(self.getOnClientDisconnectWorker.disconnectListen)
+        self.getOnClientDisconnectThread.start()
+        self.getOnClientDisconnectWorker.onDisconnect.connect(self.onClientDisconnect)
+
+    @pyqtSlot(bool)
+    def onClientDisconnect(self,state:bool):
+        if state:
+            print("closed to mobile")
+            self.closeApplication()
+
     @pyqtSlot(bool)
     def onAppIsBackground(self, isBackground: bool):
         if isBackground:
@@ -960,6 +974,9 @@ def closeApplication(self):
         self.getInfoWorker.setRunState(False)
         self.getInfoThread.quit()
         self.getInfoThread.wait()
+        self.getOnClientDisconnectWorker.setRunState(False)
+        self.getOnClientDisconnectThread.quit()
+        self.getOnClientDisconnectThread.wait()
         if getattr(self,"downloadFileWorker",None):
             self.downloadFileWorker.setRunState(False)
             self.downloadFileThread.quit()
diff --git a/GUI/src/service/src/sync_service.cpp b/GUI/src/service/src/sync_service.cpp
index b29f37c..919eb77 100644
--- a/GUI/src/service/src/sync_service.cpp
+++ b/GUI/src/service/src/sync_service.cpp
@@ -159,6 +159,8 @@ __SYNCPRIVATE void GetClientDevice(char* buffer) {
         }
     }catch(const std::exception& e){
         std::cerr << "GetClientDevice -> " << e.what() << '\n';
+        onDisconnect = true;
+        
     }
 }
 
@@ -376,7 +378,13 @@ __SYNCPUBLIC void GetDeviceBatteryStatusPerSecond(){
 
 __SYNCPUBLIC void CloseServer() {
     Sleep(100);
-    if(!mobileAppDisconnect) send(ClientSocket, DISCONNECT, strlen(DISCONNECT), 0);
+    if(!mobileAppDisconnect){
+        send(ClientSocket, DISCONNECT, strlen(DISCONNECT), 0);
+        std::cout << "masaustunden kapandi" << std::endl;
+    }else{
+        std::cout << "mobilden kapandi" << std::endl;
+    }
+        
     closesocket(ClientSocket);
     closesocket(ServerSocket);
     WSACleanup();
@@ -385,3 +393,4 @@ __SYNCPUBLIC void CloseServer() {
     onDisconnect = true;
     exit(0);
 }
+
diff --git a/GUI/src/service/src/sync_service.hpp b/GUI/src/service/src/sync_service.hpp
index 230ccf4..6b5093d 100644
--- a/GUI/src/service/src/sync_service.hpp
+++ b/GUI/src/service/src/sync_service.hpp
@@ -10,7 +10,7 @@
 #include <vector>
 #include <iostream>
 
-#define __SYNCPUBLIC              extern "C" __declspec(dllexport)
+#define __SYNCPUBLIC            extern "C" __declspec(dllexport)
 #define __SYNCPRIVATE
 #define SINGLE                  "SINGLE"
 #define DECLINE                 "DECLINE"
@@ -73,5 +73,6 @@ __SYNCPUBLIC inline bool GetSendFinishedState() { return sendFinished; }
 __SYNCPUBLIC inline bool GetIsLoadFile() { return isLoadFile; }
 __SYNCPUBLIC inline bool GetIsDownloadCompletedFile() { return isDownloadCompleted; }
 __SYNCPUBLIC inline bool CanGetDeviceState() { return isCanGetDeviceState; }
+__SYNCPUBLIC inline bool GetonDisconnectDevice() { return onDisconnect; }
 
 #endif
\ No newline at end of file
diff --git a/GUI/sync_service.dll b/GUI/sync_service.dll
index 4a7ef68..ae6e4fa 100644
Binary files a/GUI/sync_service.dll and b/GUI/sync_service.dll differ