Pixelmator for iOS just keeps getting better. In the latest release, the guys added Dynamic Touch, which lets users adjust the brush size of all Retouch tools by painting with their tip or a larger area of their finger; the Pixelmator for Mac repairing algorithm has been added to iOS; and they published the Pixelmator for iOS User Guide and video tutorials.

This is one of my favorite apps and companies. Just go buy their software.