If you're not familiar with Photoshop Touch for IOS (or Android too), it seems like it's going to be a really fun photo editing app for my IPad. But I've never used any version of Photoshop and the learning curve is substantial ... for Photoshop as well as the IPad itself. I still haven't figured out if I can import more than one photo at a time into PS Touch. Plus it doesn't help that I'm not willing to invest all day learning, I'm too busy having too much fun!
P.S. I have no idea why goldfinches eat upside down. But I can tell you it's absolutely hilarious to watch the other birds try to do the same and inevitably flutter or fall ... without getting any thistle!