The innovative rotating Compass keyboard let users dial in their smartwatch messages. Compass was designed to take advantage of the watch face’s circular shape. To enter a message, the user spins the bevel, moving three cursors along the edge of the watch to the letter they wish to choose. The Compass’s predictive algorithms will determine the most likely letter and reduce the distance of the next rotation. You can learn the novel method of typing well enough to type 12.5 words per minute after about 90 minutes of training.