Thumsta app for iPhone and iPad

Thumsta is an ergonomically designed keyboard that is based on how you how you actually hold your devices, not on how a 200 old, 10 digit-using typewriter would look like if it was shrunk.

For iPhone you can choose from left or right-handed when in portrait mode, with all the keys displayed in an arc which naturally follows the movement of your thumb. The arc can be resized to fit the size of your thumb, meaning that Thumsta is (almost) as adaptable as your thumb.

In landscape mode, two arcs are displayed, with the keys split across the two corners of the screen, allowing for faster, easier, and more natural text input.

For iPad, the two arcs are available in both portrait and landscape, and again can be resized to better fit the size of your thumb, allowing you to have the maximum possible screen area leftover for what you are looking at, while also having a fully functional keyboard.