FITALY is a keyboard layout specifically optimized for stylus or touch-based input.
The design places the most common letters closest to the centre to minimize distance travelled while entering a word.
Fitaly was invented and patented by Jean Ichbiah[1] and is commercialised by the company he founded, Textware Solutions.
The aim of the design is to optimise text entry by organising keys to minimise key-to-key finger movement, allowing faster input through one-finger entry (compared to ten digits required to type efficiently on QWERTY layout).
Keys are arranged based on individual frequencies of letters in the English language, and the probability of transitions.