So setting aside my opinion they put the parent and the child into a war of wits. Kids find ways around it or just use another computer or phone. On many phones the kids just factory reset to blow off the app.
Back to my opinion. I have a very low opinion of such apps and you have the problem of parents trying to rely on an app to replace their parenting skills. This discussion often has the parents lashing out at anyone that points that out.
What's your opinion on parental control apps?