diff --git a/screens/setting/dev_screen.py b/screens/setting/dev_screen.py
index deb2d17..7fbfaac 100644
--- a/screens/setting/dev_screen.py
+++ b/screens/setting/dev_screen.py
@@ -1,4 +1,10 @@
-from PySide6.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QPushButton
+from pathlib import Path
+
+from PySide6.QtCore import Qt
+from PySide6.QtGui import QFont
+from PySide6.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QPushButton, QLabel
+
+import build_info
 
 
 def build_dev_screen(on_exit) -> QWidget:
@@ -7,6 +13,8 @@ def build_dev_screen(on_exit) -> QWidget:
     layout.setContentsMargins(0, 0, 0, 0)
     layout.setSpacing(12)
 
+    layout.addWidget(_build_persist_toggle())
+
     hdr = QHBoxLayout()
     hdr.setContentsMargins(0, 0, 0, 0)
     hdr.setSpacing(12)
@@ -20,3 +28,45 @@ def build_dev_screen(on_exit) -> QWidget:
     layout.addWidget(exit_btn)
     layout.addStretch(1)
     return screen
+
+
+def _build_persist_toggle() -> QWidget:
+    row = QWidget()
+    layout = QHBoxLayout(row)
+    layout.setContentsMargins(12, 6, 12, 6)
+    layout.setSpacing(12)
+
+    lbl = QLabel("Показывать после перезагрузки")
+    lbl.setFont(QFont("", 14, 600))
+
+    btn = QPushButton("Выкл")
+    btn.setObjectName("SoundToggle")
+    btn.setCheckable(True)
+    btn.setChecked(_dev_flag_path().exists())
+    btn.setMinimumHeight(40)
+    btn.setMinimumWidth(110)
+    btn.setFont(QFont("", 12, 700))
+
+    def _sync_text(is_checked: bool):
+        btn.setText("Вкл" if is_checked else "Выкл")
+
+    def _persist_flag(is_checked: bool):
+        flag_path = _dev_flag_path()
+        if is_checked:
+            flag_path.touch(exist_ok=True)
+        else:
+            if flag_path.exists():
+                flag_path.unlink()
+
+    btn.toggled.connect(_sync_text)
+    btn.toggled.connect(_persist_flag)
+    _sync_text(btn.isChecked())
+
+    layout.addWidget(lbl)
+    layout.addStretch(1)
+    layout.addWidget(btn)
+    return row
+
+
+def _dev_flag_path() -> Path:
+    return Path(build_info.__file__).resolve().parent / "dev_mode_enable"