If it was voluntary, there would be no need for a app. It’s policing and enforcement. Of some personal morality.
Also, it seems rather strange to me that you focus on porn when social media is a bigger problem.
But that's probably because of my own bias, I've been trying to quit Reddit and other garbage for years.
regarding social media - that's next on our list! porn was the 1st use case and we plan to help people limit social media and gaming in the coming years.
I already asked upthread, but since this is here: how do you intend to insure this? For example, how do you insure that minors who have this app installed by their parents or guardians will be able to remove or bypass it, particularly without the parent being able to detect that (and thereby prevent it via threats)?