This app requires a high-end phone if you want smooth, problem-free gameplay. I should know because I don't have a high-end phone and my app crashes and freezes constantly. The frame rate is also abysmal ever since the "real sky" feature went live. I like that the app encourages physical activity, and I enjoy hunting for shinies. That is pretty much the only positive thing I can say about it. I shouldn't have to own an $800 phone to be able to play this game.