Install our Fitbit app on your Fitbit OS 5 compatible device (Versa 3 or Sense) to stream real-time heart rate from any compatible Fitbit watch during your workouts on FitOn. Improve your performance and compete with your friends on our leaderboard while working out with top celebrity trainers like Cassey Ho (of Blogilates), Jeanette Jenkins, Katie Dunlop (of Love Sweat Fitness), Christine Bullock, Danielle Pascente and many more.