I might have just found an easier way to edit with my beloved Photoshop software.
Photoshop touch is an app that gives you many of the features that the full Photoshop does. I can even play with layers if I want to.
Adobe is asking $5 for the phone version and $10 for the tablet version. Considering how much I use and love Photoshop, it's a bargain for me.
Enjoy!
http://www.adobe.com/products/photoshop-touch.html