Background

I want to prevent myself from viewing pornography on my cellphone. I do occasionally go to addiction support groups, but haven't yet done the Twelve Steps that they recommend. I'm hoping that, if I set up a sufficiently-good filtering setup, I can manage at least somewhat OK without doing these Steps.

I used to use the app locker formerly known as Smart AppLock in order to try to prevent myself from installing the app which I normally use to view pornography. But the app locker had a bug in it which allowed me to bypass its protection. It's not an obvious bug.

I guess I could have tried emailing the developers of the app locker; but I didn't know whether or not they'd actually care.

I could have installed a different app locker and given the password to a friend. Or I could have used Pluckeye Lockbox or a similar service to store the password. But I'd rather not rely on third-party app lockers at all. I'd rather rely upon security code written by Google. So I'd like to rely upon Android itself and to make myself a restricted profile in the normal way.

I don't want to install a custom ROM and hope that it can help me. I don't want to play around with XML files and hope to achieve my goals that way. I don't want to make myself an almost-restricted profile. I just want to create an ordinary restricted profile in the ordinary way.

My question

If I buy a cellphone running the newest version of Android, will I be able to create a restricted profile for myself in the same way that I could do so on a tablet? And, if so, how do you know? :)