iOS 7 is now on 85% of devices connected to the App Store, according to new numbers posted on Apple's App Store developer support page. The numbers come five months after the operating system's original release, and just two weeks after the release iOS 7.1, which was the first major update to iOS 7 with added visual tweaks, CarPlay support, and Touch ID enhancements.
Apple's data, which comes directly from the App Store, represents the most definite iOS 7 adoption information for developers.
Article Link: Apple's App Store Usage Numbers Suggest 85% Adoption Rate for iOS 7