diff --git a/applications/dialogs/dialogs-api-lock.h b/applications/dialogs/dialogs-api-lock.h
index fe9e934f..ad3c78e5 100644
--- a/applications/dialogs/dialogs-api-lock.h
+++ b/applications/dialogs/dialogs-api-lock.h
@@ -1,8 +1,18 @@
 #pragma once
-#define API_LOCK_INIT_LOCKED() osSemaphoreNew(1, 0, NULL);
+
+typedef osEventFlagsId_t FuriApiLock;
+
+#define API_LOCK_EVENT (1U << 0)
+
+#define API_LOCK_INIT_LOCKED() osEventFlagsNew(NULL);
+
+#define API_LOCK_WAIT_UNTIL_UNLOCK(_lock) \
+    osEventFlagsWait(_lock, API_LOCK_EVENT, osFlagsWaitAny, osWaitForever);
+
+#define API_LOCK_FREE(_lock) osEventFlagsDelete(_lock);
+
+#define API_LOCK_UNLOCK(_lock) osEventFlagsSet(_lock, API_LOCK_EVENT);
 
 #define API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(_lock) \
-    osSemaphoreAcquire(_lock, osWaitForever);      \
-    osSemaphoreDelete(_lock);
-
-#define API_LOCK_UNLOCK(_lock) osSemaphoreRelease(_lock);
\ No newline at end of file
+    API_LOCK_WAIT_UNTIL_UNLOCK(_lock);             \
+    API_LOCK_FREE(_lock);
diff --git a/applications/dialogs/dialogs-api.c b/applications/dialogs/dialogs-api.c
index 5ad9cedc..681724fa 100644
--- a/applications/dialogs/dialogs-api.c
+++ b/applications/dialogs/dialogs-api.c
@@ -10,8 +10,8 @@ bool dialog_file_select_show(
     char* result,
     uint8_t result_size,
     const char* preselected_filename) {
-    osSemaphoreId_t semaphore = API_LOCK_INIT_LOCKED();
-    furi_check(semaphore != NULL);
+    FuriApiLock lock = API_LOCK_INIT_LOCKED();
+    furi_check(lock != NULL);
 
     DialogsAppData data = {
         .file_select = {
@@ -24,14 +24,14 @@ bool dialog_file_select_show(
 
     DialogsAppReturn return_data;
     DialogsAppMessage message = {
-        .semaphore = semaphore,
+        .lock = lock,
         .command = DialogsAppCommandFileOpen,
         .data = &data,
         .return_data = &return_data,
     };
 
     furi_check(osMessageQueuePut(context->message_queue, &message, 0, osWaitForever) == osOK);
-    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(semaphore);
+    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(lock);
 
     return return_data.bool_value;
 }
@@ -39,8 +39,8 @@ bool dialog_file_select_show(
 /****************** Message ******************/
 
 DialogMessageButton dialog_message_show(DialogsApp* context, const DialogMessage* dialog_message) {
-    osSemaphoreId_t semaphore = API_LOCK_INIT_LOCKED();
-    furi_check(semaphore != NULL);
+    FuriApiLock lock = API_LOCK_INIT_LOCKED();
+    furi_check(lock != NULL);
 
     DialogsAppData data = {
         .dialog = {
@@ -49,14 +49,14 @@ DialogMessageButton dialog_message_show(DialogsApp* context, const DialogMessage
 
     DialogsAppReturn return_data;
     DialogsAppMessage message = {
-        .semaphore = semaphore,
+        .lock = lock,
         .command = DialogsAppCommandDialog,
         .data = &data,
         .return_data = &return_data,
     };
 
     furi_check(osMessageQueuePut(context->message_queue, &message, 0, osWaitForever) == osOK);
-    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(semaphore);
+    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(lock);
 
     return return_data.dialog_value;
 }
diff --git a/applications/dialogs/dialogs-message.h b/applications/dialogs/dialogs-message.h
index 0bb6d86f..e3bd6c79 100644
--- a/applications/dialogs/dialogs-message.h
+++ b/applications/dialogs/dialogs-message.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <furi.h>
 #include "dialogs-i.h"
+#include "dialogs-api-lock.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -34,7 +35,7 @@ typedef enum {
 } DialogsAppCommand;
 
 typedef struct {
-    osSemaphoreId_t semaphore;
+    FuriApiLock lock;
     DialogsAppCommand command;
     DialogsAppData* data;
     DialogsAppReturn* return_data;
diff --git a/applications/dialogs/dialogs-module-file-select.c b/applications/dialogs/dialogs-module-file-select.c
index 1f2abb40..473f1451 100644
--- a/applications/dialogs/dialogs-module-file-select.c
+++ b/applications/dialogs/dialogs-module-file-select.c
@@ -3,7 +3,7 @@
 #include <gui/modules/file_select.h>
 
 typedef struct {
-    osSemaphoreId_t semaphore;
+    FuriApiLock lock;
     bool result;
 } DialogsAppFileSelectContext;
 
@@ -11,14 +11,14 @@ static void dialogs_app_file_select_back_callback(void* context) {
     furi_assert(context);
     DialogsAppFileSelectContext* file_select_context = context;
     file_select_context->result = false;
-    API_LOCK_UNLOCK(file_select_context->semaphore);
+    API_LOCK_UNLOCK(file_select_context->lock);
 }
 
 static void dialogs_app_file_select_callback(bool result, void* context) {
     furi_assert(context);
     DialogsAppFileSelectContext* file_select_context = context;
     file_select_context->result = result;
-    API_LOCK_UNLOCK(file_select_context->semaphore);
+    API_LOCK_UNLOCK(file_select_context->lock);
 }
 
 bool dialogs_app_process_module_file_select(const DialogsAppMessageDataFileSelect* data) {
@@ -27,7 +27,7 @@ bool dialogs_app_process_module_file_select(const DialogsAppMessageDataFileSelec
 
     DialogsAppFileSelectContext* file_select_context =
         furi_alloc(sizeof(DialogsAppFileSelectContext));
-    file_select_context->semaphore = API_LOCK_INIT_LOCKED();
+    file_select_context->lock = API_LOCK_INIT_LOCKED();
 
     ViewHolder* view_holder = view_holder_alloc();
     view_holder_attach_to_gui(view_holder, gui);
@@ -45,14 +45,15 @@ bool dialogs_app_process_module_file_select(const DialogsAppMessageDataFileSelec
 
     view_holder_set_view(view_holder, file_select_get_view(file_select));
     view_holder_start(view_holder);
-    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(file_select_context->semaphore);
+    API_LOCK_WAIT_UNTIL_UNLOCK(file_select_context->lock);
 
     ret = file_select_context->result;
 
-    free(file_select_context);
     view_holder_stop(view_holder);
     view_holder_free(view_holder);
     file_select_free(file_select);
+    API_LOCK_FREE(file_select_context->lock);
+    free(file_select_context);
     furi_record_close("gui");
 
     return ret;
diff --git a/applications/dialogs/dialogs-module-message.c b/applications/dialogs/dialogs-module-message.c
index 77e727ef..f31396df 100644
--- a/applications/dialogs/dialogs-module-message.c
+++ b/applications/dialogs/dialogs-module-message.c
@@ -3,7 +3,7 @@
 #include <gui/modules/dialog_ex.h>
 
 typedef struct {
-    osSemaphoreId_t semaphore;
+    FuriApiLock lock;
     DialogMessageButton result;
 } DialogsAppMessageContext;
 
@@ -30,7 +30,7 @@ static void dialogs_app_message_back_callback(void* context) {
     furi_assert(context);
     DialogsAppMessageContext* message_context = context;
     message_context->result = DialogMessageButtonBack;
-    API_LOCK_UNLOCK(message_context->semaphore);
+    API_LOCK_UNLOCK(message_context->lock);
 }
 
 static void dialogs_app_message_callback(DialogExResult result, void* context) {
@@ -47,7 +47,7 @@ static void dialogs_app_message_callback(DialogExResult result, void* context) {
         message_context->result = DialogMessageButtonCenter;
         break;
     }
-    API_LOCK_UNLOCK(message_context->semaphore);
+    API_LOCK_UNLOCK(message_context->lock);
 }
 
 DialogMessageButton dialogs_app_process_module_message(const DialogsAppMessageDataDialog* data) {
@@ -55,7 +55,7 @@ DialogMessageButton dialogs_app_process_module_message(const DialogsAppMessageDa
     Gui* gui = furi_record_open("gui");
     const DialogMessage* message = data->message;
     DialogsAppMessageContext* message_context = furi_alloc(sizeof(DialogsAppMessageContext));
-    message_context->semaphore = API_LOCK_INIT_LOCKED();
+    message_context->lock = API_LOCK_INIT_LOCKED();
 
     ViewHolder* view_holder = view_holder_alloc();
     view_holder_attach_to_gui(view_holder, gui);
@@ -85,14 +85,15 @@ DialogMessageButton dialogs_app_process_module_message(const DialogsAppMessageDa
 
     view_holder_set_view(view_holder, dialog_ex_get_view(dialog_ex));
     view_holder_start(view_holder);
-    API_LOCK_WAIT_UNTIL_UNLOCK_AND_FREE(message_context->semaphore);
+    API_LOCK_WAIT_UNTIL_UNLOCK(message_context->lock);
 
     ret = message_context->result;
 
-    free(message_context);
     view_holder_stop(view_holder);
     view_holder_free(view_holder);
     dialog_ex_free(dialog_ex);
+    API_LOCK_FREE(message_context->lock);
+    free(message_context);
     furi_record_close("gui");
 
     return ret;
diff --git a/applications/dialogs/dialogs.c b/applications/dialogs/dialogs.c
index 8395e852..1b64ca77 100644
--- a/applications/dialogs/dialogs.c
+++ b/applications/dialogs/dialogs.c
@@ -21,7 +21,7 @@ static void dialogs_app_process_message(DialogsApp* app, DialogsAppMessage* mess
             dialogs_app_process_module_message(&message->data->dialog);
         break;
     }
-    API_LOCK_UNLOCK(message->semaphore);
+    API_LOCK_UNLOCK(message->lock);
 }
 
 int32_t dialogs_srv(void* p) {