Best porn blocker?

[AC Question]

Having trouble finding a good (and free) porn blocker for Android. It's easy for PC: I got K9 Web Protection, which only an admin can uninstall. I have yet to find a comparable Android app that (1) blocks all pornographic and adult sites on all browsers and (2) cannot be uninstalled without an admin password. Help?

 

[Tim1954]

Secure teen parental control...try that one. App store

 

[the tall guy]

Can you not speak to your carrier? they can block 18+ content (I know mine can)