There are lots of great photo editing apps available for the iPhone. However, no matter how great they are, you still have to edit in multiple apps at times in order to get the results you want. iOS 8 is aiming to change all that by using the built-in Photos app as a central hub for editing tools across the board. Once you've got apps installed that support photo and video extensions, all you've got to do is enable and start using them!
Full story from the iMore Blog...