Photoshop Touch

A step up in sophistication from Adobe's Photoshop Express, Touch, as its name suggests, was built with a touch-based interface in mind and includes features such as layers, selection tools, adjustments, and filters that are normally reserved for desktop software. We particularly like the Scribble Selection tool, which lets you select the part of an image to extract just by scribbling on it. Also nice is Refine Edge, where you use your fingertip to pick out hard-to-select photo elements, such as hair. There's a steeper learning curve than for most photo apps, but in-app tutorials will help you learn all the techniques. As you'd expect, it's tablet-oriented and so effectively useless on sub-tablet smartphones.  [$9.99; Android and iOS]