- The Fitbit Charge 3 watch with new
features enhances your ability to measure calorie burn, understand resting heart rate, and more through 24/7 heart rate tracking and a battery life of up to 7 days (varies with use and other factors). You can choose from over 15 exercise modes like running, biking, swimming, yoga, circuit training, and more, set a goal, and get real-time statistics during your workouts to see how you can improve. Automatically track time spent in Light, Deep, and REM sleep stages, and view activity trends, health insights, and personalized guidance all in one place with Fitbit Today. It is swim-proof and water-resistant up to 50 meters, allowing you to track swims and wear it in the shower. You can also connect to smartphone GPS for real-time pace and distance during outdoor runs and rides. Stay connected to your day with daily apps for weather updates and more, and receive call, text, and smartphone app notifications on your wrist.