we did explore this option but screenshots drain down the battery heavily and hence, we had to drop this. we are still exploring this based on a certain risk score depending multiple factors like time, location, website accessed etc.
i do agree this could be a symptom of another problem like depression etc. But, this is not true for all people. There are people who were perfectly normal and started watching porn out of curiosity or for entertainment and it became an escalating and eventually a compulsive behavior.
on android, adult content within social media apps will also be blocked. but, in iOS it's quite difficult, user will be able to access adult content on apps.
We do enforce NSFW filtering among platforms that provide a NSFW filtered option. E.g. youtube has such an option. It's quite challenging with reddit and social media sites. we have some indirect ways of blocking some of the social media content but in most cases. Users can also completely block "risky" apps.
that's true - our space is inherently non viral. we have so far gotten users organically through play store and google search. we are experimenting with paid marketing channels for growth.
we don't store any of the browsing activities and signing up with email is optional. Signing up with an account helps sync preferences across devices and users can choose to do that.
after speaking to users, we figured out that what to replace with is best left to the user based on their choices. a lot of our users keep posting in our forums that they took up weight lifting, exercises, meditation etc. to distract them from their problematic behavior. as to studies, there is very little research on impact of porn. but, our users seem to be happy when they make progress and stay off porn for a long time. for some of them, it's very measurable as there is prevelance of problems like erectile dysfunction (ED), finding partner unattractive sexually etc. which affects person's sexual life. overcoming porn has improved sexual life of many people based on experiences shared by them.