A Google Fitbit watch • Health Tracking: Heart rate, sleep, swimming, and GPS. ECG is available on Charge 6, Sense 2, and Pixel Watch 4. • Stress and Sleep: Stress score, sleep score, on-wrist meditation sessions, and smart alarm that wakes you at the optimal time. • Training: Daily Readiness Score and Training Load, free on Pixel Watch 3 and later. • AI Coach: Personal health coach powered by Gemini with a Fitbit Premium subscription. • Apps: Google Maps, YouTube Music, and Google Wallet for payments. • Safety: Emergency SOS and fall detection, and Satellite SOS on Pixel Watch only. • Battery: Charge 6 up to 7 days, Sense 2 about 6 days, and Pixel Watch 4 from one day to Two weeks of use with all accessories