I'm sorry if my question is stupid. My first app was just published on app store and already two users can't download the app because their iphone isn't upgraded to iOS. 6.1.
I developed the app for each iphone (display retina and other), but i haven't considered the version of iOS.
How can i do to resolve this problem?
I would like that every user could download the app, even those who have an old version of iOS.