I am going to try playing it. But wouldn't be able to play it much as I have a Windows Phone and I don't really use my iPad.
EDIT: I don't think that Fallout Shelter supports iOS 9. Whenever I download it it comes up with app can't be downloaded at this time.
Well on the other hand I have pre-ordered Fallout 4 for my PS4. So now the hype is really high.