Feather

David developed this leg-strap by reverse engineering the Pavlok 2. A user wears the leg strap while working; it vibrates very softly, and slowly increases in intensity until the user can feel it. When they notice it, they indicate it in a corresponding application, and the process restarts. The variability in how intense a vibration is required to pull the wearer out of their focus on their main task gives us quantitative insight into their focus.