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Only a good idea if you are installing it in your kid’s phone; otherwise you will be leaving your phone vulnerable to unauthorized access.
I found this one on Google Play store that is perfect for kids’ devices.
How about this one that locks you out of your most used phone apps?
https://www.standard.co.uk/news/tech/edlock-digital-wellbeing-app-instragam-puzzles-quizes-a4276156.html
There’s one in Australia that forces kids to answer puzzles before they unlock their phones.