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 workout modes and guided exercises.
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