Yahoo Dictionary Web Search

  1. ac·tiv·i·ty track·er
  2. noun

    • 1. a wearable device or a computer application that records a person’s daily physical activity, together with other data relating to their fitness or health, such as the number of calories burned, heart rate, etc.:

      an activity tracker motivates you to get up off your sofa and do some exercise
  3. Variation

    • n.: noun: activity tracker, plural noun: activity trackers