Copyright is often bound up with the moral rights of authors, one of which is final control of whether and how their work is exhibited, because the author's reputation is bound up with the exhibition of the work. This is more explicit in jurisdictions like European countries, where authors rights are more encoded into IP law.

In the USA, you have things like the first sale doctrine, which applies to things like books and audio recordings, but DOES NOT apply to software, especially not software that makes use of services provided by the author (as most mobile apps do). Do not expect, in general, to have a right to use a piece of software, especially a mobile app, in ways not explicitly authorized by the app's vendor. Yes, this also means video games as things you can play forever are going away. Get used to it.