Facebook is keeping up the pace to ensure the apps they are managing are up-to-date. Instagram is now optimized to work with the iPhone 5’s 4-inch screen and iOS 6. The app itself does not have any new features for the interface itself, instead simply allowing you to see more with the larger screen with no letter-boxes.
On the inside, there is a new registration process for new users and password recovery options have been refined. Throw in a few extra miscellaneous bug fixes and the photo app wonder is ready to go.
sources: App Store