iPhone's default parental control function is pretty basic and afaik can't even block specific apps, only very general categories, also very inconvenient as you actually have to go on the child's device every time you want to enable something. In this day and age the moment teens find out you've been tampering with their phone the first thing they'd do is change the password. Is there some kind of remote access app that lets you block access (not delete) to certain apps (eg addicting online games) from your computer?