Smartwatches now track heart rate, sleep, blood oxygen, and even ECG.
Apple Watch Series 10
Best for iPhone users. Excellent health features and app ecosystem.
Samsung Galaxy Watch 7
Best for Android. Good health tracking and Wear OS apps.
Garmin Forerunner / Fenix
Best for serious athletes. Multi-day battery and precise GPS.
What to Track
Heart rate zones, sleep stages, stress, and workout recovery.