ECG app: Electrocardiogram on your wrist.
Heart Rate Monitor: High/low/irregular heart rate notifications.
Noise App: Alerts you when sound levels are high.
Cycle Tracking: For menstrual cycle logging.
The New Apple Watch Series 6 (45mm) is: Always-On Retina display for quick viewing
Blood Oxygen (SpO2) monitoring and ECG app enabled
High and low heart rate notifications
The New Apple Watch Series 7 (45mm) Key Features: Larger Always-On Retina display with 20% more screen area than Series 6
Durable design with crack-resistant front crystal
IP6X dust resistance and WR50 water resistance
