diff --git a/applications/main/unirfremix/unirfremix_app.c b/applications/main/unirfremix/unirfremix_app.c
index 3968b6df6..ee5b07ece 100644
--- a/applications/main/unirfremix/unirfremix_app.c
+++ b/applications/main/unirfremix/unirfremix_app.c
@@ -57,7 +57,6 @@ typedef struct {
     FuriString* left_file;
     FuriString* right_file;
     FuriString* ok_file;
-    FuriString* empty;
 
     FuriString* up_l;
     FuriString* left_l;
@@ -873,7 +872,6 @@ void unirfremix_free(UniRFRemix* app, bool with_subghz) {
     furi_string_free(app->left_file);
     furi_string_free(app->right_file);
     furi_string_free(app->ok_file);
-    furi_string_free(app->empty);
 
     furi_string_free(app->up_l);
     furi_string_free(app->down_l);
@@ -911,6 +909,7 @@ int32_t unirfremix_app(void* p) {
     UniRFRemix* app = unirfremix_alloc();
 
     app->file_path = furi_string_alloc();
+    app->signal = furi_string_alloc();
 
     //setup variables before population
     app->up_file = furi_string_alloc();
@@ -918,7 +917,6 @@ int32_t unirfremix_app(void* p) {
     app->left_file = furi_string_alloc();
     app->right_file = furi_string_alloc();
     app->ok_file = furi_string_alloc();
-    app->empty = furi_string_alloc();
 
     app->up_l = furi_string_alloc();
     app->down_l = furi_string_alloc();
@@ -995,7 +993,7 @@ int32_t unirfremix_app(void* p) {
                 if(input.type == InputTypePress) {
                     if(app->up_enabled) {
                         if(app->processing == 0) {
-                            app->signal = app->empty;
+                            furi_string_reset(app->signal);
                             app->signal = app->up_file;
                             app->button = 1;
                             app->processing = 1;
@@ -1013,7 +1011,7 @@ int32_t unirfremix_app(void* p) {
                 if(input.type == InputTypePress) {
                     if(app->down_enabled) {
                         if(app->processing == 0) {
-                            app->signal = app->empty;
+                            furi_string_reset(app->signal);
                             app->signal = app->down_file;
                             app->button = 2;
                             app->processing = 1;
@@ -1031,7 +1029,7 @@ int32_t unirfremix_app(void* p) {
                 if(input.type == InputTypePress) {
                     if(app->right_enabled) {
                         if(app->processing == 0) {
-                            app->signal = app->empty;
+                            furi_string_reset(app->signal);
                             app->signal = app->right_file;
                             app->button = 3;
                             app->processing = 1;
@@ -1049,7 +1047,7 @@ int32_t unirfremix_app(void* p) {
                 if(input.type == InputTypePress) {
                     if(app->left_enabled) {
                         if(app->processing == 0) {
-                            app->signal = app->empty;
+                            furi_string_reset(app->signal);
                             app->signal = app->left_file;
                             app->button = 4;
                             app->processing = 1;
@@ -1067,7 +1065,7 @@ int32_t unirfremix_app(void* p) {
                 if(input.type == InputTypePress) {
                     if(app->ok_enabled) {
                         if(app->processing == 0) {
-                            app->signal = app->empty;
+                            furi_string_reset(app->signal);
                             app->signal = app->ok_file;
                             app->button = 5;
                             app->processing = 1;
diff --git a/applications/plugins/flipfrid/flipfrid.c b/applications/plugins/flipfrid/flipfrid.c
index 807c26659..2c5d1201d 100644
--- a/applications/plugins/flipfrid/flipfrid.c
+++ b/applications/plugins/flipfrid/flipfrid.c
@@ -57,6 +57,8 @@ FlipFridState* flipfrid_alloc() {
     FlipFridState* flipfrid = malloc(sizeof(FlipFridState));
     flipfrid->notification_msg = furi_string_alloc();
     flipfrid->attack_name = furi_string_alloc();
+    flipfrid->proto_name = furi_string_alloc();
+    flipfrid->data_str = furi_string_alloc();
 
     flipfrid->previous_scene = NoneScene;
     flipfrid->current_scene = SceneEntryPoint;
@@ -97,6 +99,8 @@ void flipfrid_free(FlipFridState* flipfrid) {
     // Strings
     furi_string_free(flipfrid->notification_msg);
     furi_string_free(flipfrid->attack_name);
+    furi_string_free(flipfrid->proto_name);
+    furi_string_free(flipfrid->data_str);
 
     free(flipfrid->data);
     free(flipfrid->payload);
@@ -120,8 +124,7 @@ int32_t flipfrid_start(void* p) {
         FURI_LOG_E(TAG, "cannot create mutex\r\n");
         furi_message_queue_free(event_queue);
         furi_record_close(RECORD_NOTIFICATION);
-        furi_record_close(RECORD_DIALOGS);
-        free(flipfrid_state);
+        flipfrid_free(flipfrid_state);
         return 255;
     }
 
diff --git a/applications/plugins/flipfrid/scene/flipfrid_scene_select_field.c b/applications/plugins/flipfrid/scene/flipfrid_scene_select_field.c
index 607ff4aca..79416d616 100644
--- a/applications/plugins/flipfrid/scene/flipfrid_scene_select_field.c
+++ b/applications/plugins/flipfrid/scene/flipfrid_scene_select_field.c
@@ -70,7 +70,7 @@ void flipfrid_center_displayed_key(FlipFridState* context, uint8_t index) {
 }
 
 void flipfrid_scene_select_field_on_enter(FlipFridState* context) {
-    furi_string_free(context->notification_msg);
+    furi_string_reset(context->notification_msg);
 }
 
 void flipfrid_scene_select_field_on_exit(FlipFridState* context) {
diff --git a/applications/plugins/subbrute/subbrute_device.c b/applications/plugins/subbrute/subbrute_device.c
index cfcf63e60..bd358dc7b 100644
--- a/applications/plugins/subbrute/subbrute_device.c
+++ b/applications/plugins/subbrute/subbrute_device.c
@@ -194,26 +194,24 @@ bool subbrute_device_create_packet_parsed(SubBruteDevice* instance, uint64_t ste
     //char step_payload[32];
     //memset(step_payload, '0', sizeof(step_payload));
     memset(instance->payload, 0, sizeof(instance->payload));
-    FuriString* candidate;
-    candidate = furi_string_alloc();
+    FuriString* candidate = furi_string_alloc();
 
     if(instance->attack == SubBruteAttackLoadFile) {
         if(step >= sizeof(instance->file_key)) {
             return false;
         }
         char subbrute_payload_byte[4];
-        furi_string_set(candidate, instance->file_key);
+        furi_string_set_str(candidate, instance->file_key);
         snprintf(subbrute_payload_byte, 4, "%02X ", (uint8_t)step);
         furi_string_replace_at(candidate, instance->load_index * 3, 3, subbrute_payload_byte);
         //snprintf(step_payload, sizeof(step_payload), "%02X", (uint8_t)instance->file_key[step]);
     } else {
         //snprintf(step_payload, sizeof(step_payload), "%16X", step);
         //snprintf(step_payload, sizeof(step_payload), "%016llX", step);
-        FuriString* buffer;
-        buffer = furi_string_alloc();
-        buffer = furi_string_alloc_printf("%16X", step);
+        FuriString* buffer = furi_string_alloc();
+        furi_string_printf(buffer, "%16X", step);
         int j = 0;
-        furi_string_set(candidate, "                       ");
+        furi_string_set_str(candidate, "                       ");
         for(uint8_t i = 0; i < 16; i++) {
             if(furi_string_get_char(buffer, i) != ' ') {
                 furi_string_set_char(candidate, i + j, furi_string_get_char(buffer, i));
@@ -306,8 +304,8 @@ SubBruteFileResult subbrute_device_attack_set(SubBruteDevice* instance, SubBrute
             instance->frequency = 868350000;
         }
         instance->bit = 12;
-        furi_string_set(instance->protocol_name, protocol_came);
-        furi_string_set(instance->preset_name, preset_ook650_async);
+        furi_string_set_str(instance->protocol_name, protocol_came);
+        furi_string_set_str(instance->preset_name, preset_ook650_async);
         break;
     case SubBruteAttackChamberlain9bit300:
     case SubBruteAttackChamberlain9bit315:
@@ -320,32 +318,32 @@ SubBruteFileResult subbrute_device_attack_set(SubBruteDevice* instance, SubBrute
             instance->frequency = 390000000;
         }
         instance->bit = 9;
-        furi_string_set(instance->protocol_name, protocol_cham_code);
-        furi_string_set(instance->preset_name, preset_ook650_async);
+        furi_string_set_str(instance->protocol_name, protocol_cham_code);
+        furi_string_set_str(instance->preset_name, preset_ook650_async);
         break;
     case SubBruteAttackLinear10bit300:
         instance->frequency = 300000000;
         instance->bit = 10;
-        furi_string_set(instance->protocol_name, protocol_linear);
-        furi_string_set(instance->preset_name, preset_ook650_async);
+        furi_string_set_str(instance->protocol_name, protocol_linear);
+        furi_string_set_str(instance->preset_name, preset_ook650_async);
         break;
     case SubBruteAttackLinear10bit310:
         instance->frequency = 310000000;
         instance->bit = 10;
-        furi_string_set(instance->protocol_name, protocol_linear);
-        furi_string_set(instance->preset_name, preset_ook650_async);
+        furi_string_set_str(instance->protocol_name, protocol_linear);
+        furi_string_set_str(instance->preset_name, preset_ook650_async);
         break;
     case SubBruteAttackNICE12bit433:
         instance->frequency = 433920000;
         instance->bit = 12;
-        furi_string_set(instance->protocol_name, protocol_nice_flo);
-        furi_string_set(instance->preset_name, preset_ook650_async);
+        furi_string_set_str(instance->protocol_name, protocol_nice_flo);
+        furi_string_set_str(instance->preset_name, preset_ook650_async);
         break;
     case SubBruteAttackNICE12bit868:
         instance->frequency = 868350000;
         instance->bit = 12;
-        furi_string_set(instance->protocol_name, protocol_nice_flo);
-        furi_string_set(instance->preset_name, preset_ook650_async);
+        furi_string_set_str(instance->protocol_name, protocol_nice_flo);
+        furi_string_set_str(instance->preset_name, preset_ook650_async);
         break;
     default:
         FURI_LOG_E(TAG, "Unknown attack type: %d", type);
diff --git a/applications/plugins/subbrute/views/subbrute_main_view.c b/applications/plugins/subbrute/views/subbrute_main_view.c
index a5a67d2fa..a9974ced1 100644
--- a/applications/plugins/subbrute/views/subbrute_main_view.c
+++ b/applications/plugins/subbrute/views/subbrute_main_view.c
@@ -33,7 +33,7 @@ void subbrute_main_view_set_callback(
     instance->context = context;
 }
 
-void center_displayed_key(FuriString* result, const char* key_cstr, uint8_t index) {
+FuriString* center_displayed_key(const char* key_cstr, uint8_t index) {
     uint8_t str_index = (index * 3);
 
     char display_menu[] = {
@@ -75,7 +75,7 @@ void center_displayed_key(FuriString* result, const char* key_cstr, uint8_t inde
             display_menu[15] = ' ';
         }
     }
-    result = furi_string_alloc_set(display_menu);
+    return furi_string_alloc_set(display_menu);
 }
 
 void subbrute_main_view_draw(Canvas* canvas, SubBruteMainViewModel* model) {
@@ -97,9 +97,8 @@ void subbrute_main_view_draw(Canvas* canvas, SubBruteMainViewModel* model) {
         canvas_draw_str_aligned(canvas, 64, 26, AlignCenter, AlignTop, msg_index);
 
         FuriString* menu_items;
-        menu_items = furi_string_alloc();
 
-        center_displayed_key(menu_items, m->key_field, m->index);
+        menu_items = center_displayed_key(m->key_field, m->index);
         canvas_set_font(canvas, FontSecondary);
         canvas_draw_str_aligned(
             canvas, 64, 40, AlignCenter, AlignTop, furi_string_get_cstr(menu_items));
@@ -109,6 +108,7 @@ void subbrute_main_view_draw(Canvas* canvas, SubBruteMainViewModel* model) {
         elements_button_right(canvas, ">");
 
         furi_string_reset(menu_items);
+        furi_string_free(menu_items);
     } else {
         // Menu
         canvas_set_color(canvas, ColorBlack);
diff --git a/applications/plugins/wifi_marauder_companion/scenes/wifi_marauder_scene_console_output.c b/applications/plugins/wifi_marauder_companion/scenes/wifi_marauder_scene_console_output.c
index d1c5e8017..c5afa6502 100644
--- a/applications/plugins/wifi_marauder_companion/scenes/wifi_marauder_scene_console_output.c
+++ b/applications/plugins/wifi_marauder_companion/scenes/wifi_marauder_scene_console_output.c
@@ -35,13 +35,13 @@ void wifi_marauder_scene_console_output_on_enter(void* context) {
         if(0 == strncmp("help", app->selected_tx_string, strlen("help"))) {
             const char* help_msg =
                 "For app support/feedback,\nreach out to me:\n@cococode#6011 (discord)\n0xchocolate (github)\n";
-            string_cat_str(app->text_box_store, help_msg);
+            furi_string_cat_str(app->text_box_store, help_msg);
             app->text_box_store_strlen += strlen(help_msg);
         }
 
         if(app->show_stopscan_tip) {
             const char* help_msg = "Press BACK to send stopscan\n";
-            string_cat_str(app->text_box_store, help_msg);
+            furi_string_cat_str(app->text_box_store, help_msg);
             app->text_box_store_strlen += strlen(help_msg);
         }
     }