Our team is currently in the midst of building a football pool app for iOS 6. (Hopefully it'll be approved and out before the changeover happens..) With the news of iOS7 being released on Sep 10, I wanted to see what you guys think the impact could be. The app store seems to be similar with a few aesthetics changes. The phone interface seems to be massively overhauled. There may be a number of backend changes. Bottom line - how much rework do you guys anticipate will be required for the new OS? What will be your major concern? And how challenging do you think it will be to work with iOS7?