I just found out that you can block adult/porn websites on iOS devices other than installing VPN websites blockers. How I found out about it is: Go to settings> select Screen Time and turn it on> go to Content & Privacy Restrictions> select Content Restrictions> select Web Content> and select Limit Adult Websites to block porn websites. When you enter Safari private website option is grey out and you can’t clear history websites if you have alot of history websites when you use the internet. To clear history just select Unrestricted Access and clear your history from Safari and select back Limit Adult Websites to prevent going to adult websites. I’m glad that I will get away from porn and masturbation soon since I’m 20 and I need to stop going back since it’s too much and I need to stop it now!