Pattern-crazy design duo Nicole and Petra Kapitza have released their first app for Apple's iPad and iPhone app, geometric™, which unsurprisingly makes patterns.
The sisters say that geometric™ is a powerful pattern designer and cool wallpaper creator rolled into one. All you do is swipe your finger across the screen and a new pattern is generated.
Patterns can can be saved to iPhoto, used as wallpaper or emailed to friends.
Kapitza recently released a book of patterns designs called Organic.