Activity Tracking: Monitors steps, calories, distance, heart rate, sleep tracking, blood oxygen, stress tracking, GPS, energy levels, hydration and women’s health. Tracks running, cycling, swimming, yoga, and more. Also has sports apps for workouts modes and guided exercises. Allows creating and customizing workouts.
Performance metrics: Provides VO2 max, training effect, and recovery time.
Maps: Includes preloaded topographic maps.
Notifications: Displays notifications from your phone.
Water resistant: Yes

Activity Tracking: Steps, heart rate, calories, sleep, fitness modes. Provides health data and trends through the Withings app.
ECG Functionality: Measures electrocardiograms to assess heart health.
Water resistant: Yes