Robert Lang's Origami app for iPhone and iPad

Robert Lang is a world renowned origami master. This application has 13 of his most popular figures. He takes you through step-by-step using clear easy to follow instructions. There are figures to satisfy all levels of ability, start of easy with the 10 step snail, work your way up to the Pegasus with 81 steps (that may take a weekend or two).

Theres also an integrated instruction guide, to help give you a firm footing in the basics of origami design and technique. There are 33 pages full of terms, techniques and history. Technical terms within the step instructions are cross-referenced in the guide, so you can quickly go straight to the explanation of the term and zip right back to the current step youre working on.

Theres also a beautiful gallery of some of Roberts works that should inspire you to keep folding.