Contrary to their desktop computer counterparts, which try and cram as many features as possible into an application suite, iPad apps generally have a very limited set of functions and tools. There is no one size fits all solution for editing images on the iPad and so it really comes down to deciding what post-processing you commonly do and what are the best apps to accomplish that. Quite often this involves a few saves to the photo library as you move your image back and forth between multiple iPad image editing apps. As an example, Im going to go through the beginning-to-end post-processing workflow of a portrait I took of my kids a couple weekends ago after they returned from a karate class. The creative part of my mind was thinking things like Rocky, fighter & manager, The Wrestler and that was the theme on which I would base the final image.