GREAT GAME, but minor issues

I had to delete the game off my phone because every time I started it up it would crash my phone, let me remind you I have a 6s. I have up to date IOS and my phone crashes and has to reset every time I play it? Thats ridiculous, I thought my phone broke when it couldnt turn on after 2 days but now its all good because I deleted fallout shelter, so Bethesda please fix your game because I like the game but just messes up your devices hardware. I dont want to have the idea linger in my mind about purchasing a new phone because of an app that broke it.

about Fallout Shelter