It pales next to its desktop counterpart — no pasting your buddy's face onto Lady Gaga's body — but this app's fine-grained controls for exposure, saturation, tint, and contrast make it a helpful tool in your post-processing arsenal.
WIRED Crops, rotates, and straightens shots. Produces especially nice black-and-whites. Built-in effects for quick alterations.
TIRED No visible slider for adjusting exposure, saturation, etc. Annoying entreaties to buy pricey Photoshop add-ons.