Pretty easy to understand ui. Crashes every so often. Im on an iPad 4. I love the control it gives me over exposure, wb, and other things I usually use Lightroom and photoshop for. Lr and ps do them better, but for the price, Jazz does its job well. (And as a person who loves jazz, I have to say I dig the use of the word "jazz" since the automatic photos are "improvised". I see what they did there.) :D
Silversbird about Jazz! - Powerful Photo Editor