Garmin

Body Battery uses heart rate variability, stress, and activity data to calculate a real-time 0-100 energy reserve score, helping users decide when to exercise, rest, or recover. All-day Pulse Ox monitoring measures blood oxygen saturation continuously during the day and night, tracking altitude acclimatisation and overnight SpO2 fluctuations linked to sleep apnea. Garmin Connect IQ platform allows third-party app installation including Strava, Spotify music controls, and guided breathing sessions. Five-day battery life in smartwatch mode extends to seven days in health tracking mode. 50-metre water resistance supports swimming lap counting.