App locker with math problems

〇 About 
This is app locker for parent of elementary school children.
You can set app lock schedule and available  time. To unlock , child must work arithmetic exercises.

Use YouTube and other apps that children often use to study effectively with restrictions.
 can do.

〇 Installed functions
・ Specify usage time for each application
・ Specify break time for each app
・ Specify prohibited times for each application
· Solves arithmetic problems when unlocking.

〇 Other
If your child is just having trouble watching a video on a smartphone or playing a game.
Or, if you forcibly pick up your smartphone from a child, you are in trouble.
I would be happy if these people helped me.