TiltCrown: Extending Input on a Smartwa...

Many smartwatches have a digital crown as a complementary input modality to the touchscreen. While the crown eliminates issues of touchscreen occlusion and imprecision, i.e., the ‘fat-finger’ problem, the crown input is limited as it only supports bi-directional rotations along a single dimension. We present TiltCrown, a crown prototype that increases a smartwatch’s input bandwidth through an isometric joystick. TiltCrown supports angular tilt, rotations and button press events for touchless smartwatch interaction. In a user study we explore how accurate and how fast users can perform item selection tasks using TiltCrown.