With Fitbit smartwatches, you can work on your health and stamina. Set personal goals on your Fitbit smartwatch. You receive reminders to move, for example. Fitbit activity trackers mainly keep track of your daily movement and activities. The latest model is the Fitbit Charge 6. With the Fitbit Sense 2 or Fitbit Versa 4, you get a larger screen and can read your data more easily.