What is the blocker application for android so that when the application is blocked, an error message is displayed?

Question

Android

An outright ban is not always the best way to prevent a child from sitting on a tablet for a long time.
It's not always easy to explain either.
What is the app-blocker for android so that when the app is blocked, an error message is displayed?
In addition, it will be good if it has the following functionality:
- Remote application blocking via the Internet
- Self-defense against
deletion understanding before the child, you can use the app blocker (to prevent negative consequences in the form of poor eyesight, stoop, poor performance at school, etc.).