Please help me, i want to block porn from all devices Once and for all

Hello i can't stop watching longer than one week, i need a solution to block adult content from my laptop nd smartphone Once and for all, i need like kindaf app/Software or Parameter to lock this shit with a password, that i will choose randomly so i can't remember it.. Thank you.

 

I need something to help me, so i can't unlock this apps anymore.. Is there something in android to personalize DnS and lock it once and for all..