I get the hangs too on iOS, I think that's platform independent.
totally possibly of course.
To be on the other side, my iphone is a 7 and I haven't seen that issue yet.
But aside from performance on my Nexus 6 for two years that seems like it IS running on an emulator (where according to Syn, Bluestacks or whatever is probably running it better, which is crazy) I did get now loading hangs too with Android, even before the Nougat update.
Also, I would have like "account not synced" or whatever those other errors are where it was trying to continue where you left off or load a battle and it's like something was off. When I had googled it, people who were more fed up than I were reinstalling it to fix it. Fortunately for my lazy tail, it went away after a week without me doing anything. Was like data was unsynced or something, and it would just make you restart game in the middle of a now loading screen.
Not everybody can just go out and buy an iphone, and I know that. My Nexus 6 had been through two cracked screens was only the second smart phone (after Droid DNA) ever and I loved it, I did. But man...
now that I've gone to the dark side, anybody on the fence, I'm telling you, like Syn said, iPhone is really night and day difference. I guess it's because of iPhone domination in Japan? Anyways. I never felt like a second-rate citizen with Android until DeNa showed me I was.
(Oh and the Grey bars arent missed, WTF, cant even optimize some kind of dynamic resolution or something? bah!)