diff --git a/applications/main/lfrfid/scenes/lfrfid_scene_save_type.c b/applications/main/lfrfid/scenes/lfrfid_scene_save_type.c
index 6077348f1..eb73b1123 100644
--- a/applications/main/lfrfid/scenes/lfrfid_scene_save_type.c
+++ b/applications/main/lfrfid/scenes/lfrfid_scene_save_type.c
@@ -1,7 +1,6 @@
 #include "../lfrfid_i.h"
 
 typedef struct {
-    FuriString* menu_item_name[LFRFIDProtocolMax];
     uint32_t line_sel;
 } SaveTypeCtx;
 
@@ -16,26 +15,28 @@ void lfrfid_scene_save_type_on_enter(void* context) {
     Submenu* submenu = app->submenu;
 
     SaveTypeCtx* state = malloc(sizeof(SaveTypeCtx));
+    FuriString* protocol_string = furi_string_alloc();
     for(uint8_t i = 0; i < LFRFIDProtocolMax; i++) {
         if((strcmp(
                 protocol_dict_get_manufacturer(app->dict, i),
                 protocol_dict_get_name(app->dict, i)) != 0) &&
            (strcmp(protocol_dict_get_manufacturer(app->dict, i), "N/A") != 0)) {
-            state->menu_item_name[i] = furi_string_alloc_printf(
+            furi_string_printf(
+                protocol_string,
                 "%s %s",
                 protocol_dict_get_manufacturer(app->dict, i),
                 protocol_dict_get_name(app->dict, i));
         } else {
-            state->menu_item_name[i] =
-                furi_string_alloc_printf("%s", protocol_dict_get_name(app->dict, i));
+            furi_string_printf(protocol_string, "%s", protocol_dict_get_name(app->dict, i));
         }
         submenu_add_item(
             submenu,
-            furi_string_get_cstr(state->menu_item_name[i]),
+            furi_string_get_cstr(protocol_string),
             i,
             lfrfid_scene_save_type_submenu_callback,
             app);
     }
+    furi_string_free(protocol_string);
 
     submenu_set_selected_item(
         submenu, scene_manager_get_scene_state(app->scene_manager, LfRfidSceneSaveType));
@@ -74,13 +75,7 @@ void lfrfid_scene_save_type_on_exit(void* context) {
 
     submenu_reset(app->submenu);
 
-    for(uint8_t i = 0; i < LFRFIDProtocolMax; i++) {
-        furi_string_free(state->menu_item_name[i]);
-    }
-
     uint32_t line_sel = state->line_sel;
-
     free(state);
-
     scene_manager_set_scene_state(app->scene_manager, LfRfidSceneSaveType, line_sel);
 }
diff --git a/applications/main/nfc/scenes/nfc_scene_mf_desfire_app.c b/applications/main/nfc/scenes/nfc_scene_mf_desfire_app.c
index afc5f0dee..882dc5fea 100644
--- a/applications/main/nfc/scenes/nfc_scene_mf_desfire_app.c
+++ b/applications/main/nfc/scenes/nfc_scene_mf_desfire_app.c
@@ -51,23 +51,18 @@ void nfc_scene_mf_desfire_app_on_enter(void* context) {
             nfc_scene_mf_desfire_app_submenu_callback,
             nfc);
 
-        uint16_t cap = NFC_TEXT_STORE_SIZE;
-        char* buf = nfc->text_store;
+        FuriString* label = furi_string_alloc();
         int idx = SubmenuIndexDynamic;
         for(MifareDesfireFile* file = app->file_head; file; file = file->next) {
-            int size = snprintf(buf, cap, "File %d", file->id);
-            if(size < 0 || size >= cap) {
-                FURI_LOG_W(
-                    TAG,
-                    "Exceeded NFC_TEXT_STORE_SIZE when preparing file id strings; menu truncated");
-                break;
-            }
-            char* label = buf;
-            cap -= size + 1;
-            buf += size + 1;
+            furi_string_printf(label, "File %d", file->id);
             submenu_add_item(
-                nfc->submenu, label, idx++, nfc_scene_mf_desfire_app_submenu_callback, nfc);
+                nfc->submenu,
+                furi_string_get_cstr(label),
+                idx++,
+                nfc_scene_mf_desfire_app_submenu_callback,
+                nfc);
         }
+        furi_string_free(label);
 
         view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewMenu);
     }
diff --git a/applications/main/nfc/scenes/nfc_scene_mf_desfire_data.c b/applications/main/nfc/scenes/nfc_scene_mf_desfire_data.c
index e619d0377..c7caee8dc 100644
--- a/applications/main/nfc/scenes/nfc_scene_mf_desfire_data.c
+++ b/applications/main/nfc/scenes/nfc_scene_mf_desfire_data.c
@@ -33,21 +33,18 @@ void nfc_scene_mf_desfire_data_on_enter(void* context) {
         nfc_scene_mf_desfire_data_submenu_callback,
         nfc);
 
-    uint16_t cap = NFC_TEXT_STORE_SIZE;
-    char* buf = nfc->text_store;
+    FuriString* label = furi_string_alloc();
     int idx = SubmenuIndexDynamic;
     for(MifareDesfireApplication* app = data->app_head; app; app = app->next) {
-        int size = snprintf(buf, cap, "App %02x%02x%02x", app->id[0], app->id[1], app->id[2]);
-        if(size < 0 || size >= cap) {
-            FURI_LOG_W(
-                TAG, "Exceeded NFC_TEXT_STORE_SIZE when preparing app id strings; menu truncated");
-            break;
-        }
-        char* label = buf;
-        cap -= size + 1;
-        buf += size + 1;
-        submenu_add_item(submenu, label, idx++, nfc_scene_mf_desfire_data_submenu_callback, nfc);
+        furi_string_printf(label, "App %02x%02x%02x", app->id[0], app->id[1], app->id[2]);
+        submenu_add_item(
+            submenu,
+            furi_string_get_cstr(label),
+            idx++,
+            nfc_scene_mf_desfire_data_submenu_callback,
+            nfc);
     }
+    furi_string_free(label);
 
     if(state >= MifareDesfireDataStateItem) {
         submenu_set_selected_item(
diff --git a/applications/services/gui/modules/submenu.c b/applications/services/gui/modules/submenu.c
index f8af44fdb..72626c587 100644
--- a/applications/services/gui/modules/submenu.c
+++ b/applications/services/gui/modules/submenu.c
@@ -9,17 +9,48 @@ struct Submenu {
 };
 
 typedef struct {
-    const char* label;
+    FuriString* label;
     uint32_t index;
     SubmenuItemCallback callback;
     void* callback_context;
 } SubmenuItem;
 
-ARRAY_DEF(SubmenuItemArray, SubmenuItem, M_POD_OPLIST);
+static void SubmenuItem_init(SubmenuItem* item) {
+    item->label = furi_string_alloc();
+    item->index = 0;
+    item->callback = NULL;
+    item->callback_context = NULL;
+}
+
+static void SubmenuItem_init_set(SubmenuItem* item, const SubmenuItem* src) {
+    item->label = furi_string_alloc_set(src->label);
+    item->index = src->index;
+    item->callback = src->callback;
+    item->callback_context = src->callback_context;
+}
+
+static void SubmenuItem_set(SubmenuItem* item, const SubmenuItem* src) {
+    furi_string_set(item->label, src->label);
+    item->index = src->index;
+    item->callback = src->callback;
+    item->callback_context = src->callback_context;
+}
+
+static void SubmenuItem_clear(SubmenuItem* item) {
+    furi_string_free(item->label);
+}
+
+ARRAY_DEF(
+    SubmenuItemArray,
+    SubmenuItem,
+    (INIT(API_2(SubmenuItem_init)),
+     SET(API_6(SubmenuItem_set)),
+     INIT_SET(API_6(SubmenuItem_init_set)),
+     CLEAR(API_2(SubmenuItem_clear))))
 
 typedef struct {
     SubmenuItemArray_t items;
-    const char* header;
+    FuriString* header;
     size_t position;
     size_t window_position;
 } SubmenuModel;
@@ -36,9 +67,9 @@ static void submenu_view_draw_callback(Canvas* canvas, void* _model) {
 
     canvas_clear(canvas);
 
-    if(model->header) {
+    if(!furi_string_empty(model->header)) {
         canvas_set_font(canvas, FontPrimary);
-        canvas_draw_str(canvas, 4, 11, model->header);
+        canvas_draw_str(canvas, 4, 11, furi_string_get_cstr(model->header));
     }
 
     canvas_set_font(canvas, FontSecondary);
@@ -48,8 +79,8 @@ static void submenu_view_draw_callback(Canvas* canvas, void* _model) {
     for(SubmenuItemArray_it(it, model->items); !SubmenuItemArray_end_p(it);
         SubmenuItemArray_next(it)) {
         const size_t item_position = position - model->window_position;
-        const size_t items_on_screen = model->header ? 3 : 4;
-        uint8_t y_offset = model->header ? 16 : 0;
+        const size_t items_on_screen = furi_string_empty(model->header) ? 4 : 3;
+        uint8_t y_offset = furi_string_empty(model->header) ? 0 : 16;
 
         if(item_position < items_on_screen) {
             if(position == model->position) {
@@ -134,7 +165,7 @@ Submenu* submenu_alloc() {
             SubmenuItemArray_init(model->items);
             model->position = 0;
             model->window_position = 0;
-            model->header = NULL;
+            model->header = furi_string_alloc();
         },
         true);
 
@@ -145,7 +176,13 @@ void submenu_free(Submenu* submenu) {
     furi_assert(submenu);
 
     with_view_model(
-        submenu->view, SubmenuModel * model, { SubmenuItemArray_clear(model->items); }, true);
+        submenu->view,
+        SubmenuModel * model,
+        {
+            furi_string_free(model->header);
+            SubmenuItemArray_clear(model->items);
+        },
+        true);
     view_free(submenu->view);
     free(submenu);
 }
@@ -170,7 +207,7 @@ void submenu_add_item(
         SubmenuModel * model,
         {
             item = SubmenuItemArray_push_new(model->items);
-            item->label = label;
+            furi_string_set_str(item->label, label);
             item->index = index;
             item->callback = callback;
             item->callback_context = callback_context;
@@ -188,7 +225,7 @@ void submenu_reset(Submenu* submenu) {
             SubmenuItemArray_reset(model->items);
             model->position = 0;
             model->window_position = 0;
-            model->header = NULL;
+            furi_string_reset(model->header);
         },
         true);
 }
@@ -221,7 +258,7 @@ void submenu_set_selected_item(Submenu* submenu, uint32_t index) {
                 model->window_position -= 1;
             }
 
-            const size_t items_on_screen = model->header ? 3 : 4;
+            const size_t items_on_screen = furi_string_empty(model->header) ? 4 : 3;
 
             if(items_size <= items_on_screen) {
                 model->window_position = 0;
@@ -240,7 +277,7 @@ void submenu_process_up(Submenu* submenu) {
         submenu->view,
         SubmenuModel * model,
         {
-            const size_t items_on_screen = model->header ? 3 : 4;
+            const size_t items_on_screen = furi_string_empty(model->header) ? 4 : 3;
             const size_t items_size = SubmenuItemArray_size(model->items);
 
             if(model->position > 0) {
@@ -263,7 +300,7 @@ void submenu_process_down(Submenu* submenu) {
         submenu->view,
         SubmenuModel * model,
         {
-            const size_t items_on_screen = model->header ? 3 : 4;
+            const size_t items_on_screen = furi_string_empty(model->header) ? 4 : 3;
             const size_t items_size = SubmenuItemArray_size(model->items);
 
             if(model->position < items_size - 1) {
@@ -303,5 +340,14 @@ void submenu_set_header(Submenu* submenu, const char* header) {
     furi_assert(submenu);
 
     with_view_model(
-        submenu->view, SubmenuModel * model, { model->header = header; }, true);
+        submenu->view,
+        SubmenuModel * model,
+        {
+            if(header == NULL) {
+                furi_string_reset(model->header);
+            } else {
+                furi_string_set_str(model->header, header);
+            }
+        },
+        true);
 }
diff --git a/firmware/targets/f7/api_symbols.csv b/firmware/targets/f7/api_symbols.csv
index 6e968cab0..58cc06293 100644
--- a/firmware/targets/f7/api_symbols.csv
+++ b/firmware/targets/f7/api_symbols.csv
@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,11.4,,
+Version,+,11.5,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/cli/cli.h,,
 Header,+,applications/services/cli/cli_vcp.h,,
@@ -178,6 +178,7 @@ Header,+,lib/subghz/transmitter.h,,
 Header,+,lib/toolbox/args.h,,
 Header,+,lib/toolbox/crc32_calc.h,,
 Header,+,lib/toolbox/dir_walk.h,,
+Header,+,lib/toolbox/float_tools.h,,
 Header,+,lib/toolbox/hmac_sha256.h,,
 Header,+,lib/toolbox/manchester_decoder.h,,
 Header,+,lib/toolbox/manchester_encoder.h,,
@@ -925,6 +926,7 @@ Function,+,flipper_format_write_int32,_Bool,"FlipperFormat*, const char*, const
 Function,+,flipper_format_write_string,_Bool,"FlipperFormat*, const char*, FuriString*"
 Function,+,flipper_format_write_string_cstr,_Bool,"FlipperFormat*, const char*, const char*"
 Function,+,flipper_format_write_uint32,_Bool,"FlipperFormat*, const char*, const uint32_t*, const uint16_t"
+Function,+,float_is_equal,_Bool,"float, float"
 Function,-,flockfile,void,FILE*
 Function,-,floor,double,double
 Function,-,floorf,float,float
diff --git a/lib/toolbox/SConscript b/lib/toolbox/SConscript
index d51e31826..da6c1115c 100644
--- a/lib/toolbox/SConscript
+++ b/lib/toolbox/SConscript
@@ -20,6 +20,7 @@ env.Append(
         File("args.h"),
         File("saved_struct.h"),
         File("version.h"),
+        File("float_tools.h"),
         File("tar/tar_archive.h"),
         File("stream/stream.h"),
         File("stream/file_stream.h"),