important:

If your android version is higher than 5, you're gonna need to give a manual permission to the app:

settings -> security -> Apps with usage access -> apptimer

The excesive use of mobile applications has led to a lack of movement and so much health and social hazards for humans. So, we need apps that control our usage. AppTimer allows you to set a time limit on how much an application is usabel. after the time limit is finished, the app will locked until the superviser unlocks it.

don't forget to rate the app ;)