Get a watch that gives you more with Fitbit Ionic—a motivating timepiece packed with fitness guidance, health insights, music storage, apps and more. Features include: Dynamic Personal Coaching - on-screen guidance for every move and routines that adapt based on your feedback. PurePulse® Heart Rate - get continuous, automatic, wrist-based heart rate and simplified heart rate zones. Learn more. SmartTrack™ - automatically record select exercises like running, biking and more and see them saved in the Fitbit app. Sleep Stages and Insights - see your time spent in light, deep and REM sleep stages and get personalised insights to help you improve. Water-resistant up to 50M and tracks swims.