For users of Android 10 or higher

There are cases where the app can be used without any restrictions even after the usable time has passed. Please give the right to “Allow display over other apps” to stop overuse in the following procedure.

If the app version is less than 7.0.0, please update.

1. Open the “App Off Timer”.
2. You will be asked for permission to overlay on top of other apps, so tap OK.
3. On the screen that has started up, turn on the “Allow display over other apps” section.

that’s all.