title: Fitness tracker with API for live hand movements
body: <p>I'm trying to develop an app for a fitness tracker(can be any), which has an API to track the live hand movements (For every couple of seconds). To be specific, trying to find aggressive hand movements to track users who need help (like seizures, under attack by someone etc.,) and alert the friends/family. </p>
  
  <p>Can anyone suggest a fitness tracker which has such API exposed? Learned that FitBit don't have such API exposed.  </p>