First of all, I really like projects that change the world!

But in your description or idea I do not see a Game changer.
The motivation from user B to pay tokens to see Profil from user A. Why?

I see just one motivation, if user B is a lonely guy and user B a hot single girl. In this case it could work, but I think there are already alternatives at the App Store.

If you want to build an app for Android, btw a lot of guys using iOS, do it and see the reaction of market.

If you got your experience and your Test run will be successful go ahead and improve your app.

May you have to work your idea out but for now I don t see a benefit for anyone. Sorry to say.

Good luck!