KALQ is optimized for rapid two thumb typing on touchscreen devices. It works on tablets as well as smartphones with a large display.Additional discussion at The Atlantic.
The design is based on work by researchers from Max Planck Institute of Informatics, Montana Tech and University of St.Andrews. The design considers multiple human factors affecting the movement of thumbs. A user study showed that users could speed up typing by more than 30% over their regular speed with a default Qwerty layout.