TypeCase is an all-in-one gestural keyboard that allows people with diverse disabilities to operate a smartphone more efficiently and smoothly. The project synthesises and condenses the functionality of a keyboard and mouse, facilitating effortless use - with just one hand. Condensing a keyboard down from 50 buttons to just five, the user can press combinations or 'chords' of buttons to type. By embedding this technology into phone covers, TypeCase frees up the whole screen, permits typing without looking, and reintroduces physical feedback when typing on phones. Although initially designed for one-handed users such as amputees, stroke victims and hemiplegics, the potential value of TypeCase could extend to the blind by providing them with a physical typing mechanism.