iOS 5 brought some basic editing features to the Photos app. Select any photo, tap Edit, and you have options to rotate, enhance, remove red eyes, and crop. These changes are also reversible, as you can tap back into that photo at a later time and choose “revert to original.” Fortunately, Aperture, Apple’s pro-sumer photo editor and manager for the Mac, also recognizes these adjustments and even lets you roll them back.
ApertureExpert.com noted a little while ago that edits made with iOS’s built-in photo tools appear as adjustments in Aperture. If you enable iCloud’s Photo Stream feature, any photos you edit in the Photos app will appear with the adjustments badge. In Aperture, you can hide and show the adjustments you made on iOS, or revert to the original photo entirely.