Screen On Off Time Viewer

You can record the time the screen is on.

You can also view the remaining battery capacity by time.

You can check the sleeping time.

When the screen is turned off or on, the app creates a file monthly, adds a log to the end of the file, and reads the file only once when the app is first run, so resource consumption is very low.

With low battery consumption, you can check your sleep time and smartphone usage time every day.