I think it also has to do with the fact that the iPhones have a fixed set of specs. With android you never know what kind of specs your users phone has (screen

I think it also has to do with the fact that the iPhones have a fixed set of specs. With android you never know what kind of specs your users phone has (screen height/width e.d.). But with the iPhone you're always sure what controls your user has (touch screen instead of controller).