ScreenLimit

ScreenLimit was a time based content-control software for parents to control the time their children spend on devices. 
Working.
Children can do assigned tasks like homework to earn more time. Multiple people can use the same or more devices in combination with their own time. They will get a warning when time runs out. When time runs out icons or the desktop will disappear and the ScreenLimit timer page will appear. Multiple schedules can be made like weekend/schoolday/vacation. An example of a schedule could be: Block at 22:00 (regardless of unspent time); Add 60 minutes (a day) at 00:01; UnBlock at 07:00. Parents can see realtime who is using what device. Parents can also manually (un)block a child. With one account multiple children and devices can be managed by multiple parents.
History.
ScreenLimit was first released in November 2016.
ScreenLimit was closed on 22 January 2019.
Reviews.
PC Advisor Full Review
Educational App Store Teacher's Review