Colemak is the Colemak keyboard layout implemented on the iPhone OS.
Quite an interesting keyboard layout we’ve got here. One I’m certainly unfamiliar with, but works perfectly. It integrates into your keyboard menu (Settings app > General > Keyboard > International) and you can toggle it on and off from there. Unless you’re already familiar with this layout from using different devices, I wouldn’t bother downloading this.
[Source - BigBoss] Cydia