Description: Continuous, automatic, wrist-based heart rate tracking without an uncomfortable chest strap Automatically recognizes select activities and records it in the exercise section of the Fitbit app Fitbit Alta™ automatically tracks how long and how well you sleep, so you can…

Description: Includes fitness monitoring tools such as VO2 max, fitness age and strength training Monitor wellness with all-day stress tracking and the relaxation-based breathing timer Can estimate fitness age, which you may be able to decrease over time with hard work…

Recent review: Synch nicely with xiaomi watch