GPS model lets you take calls and reply to texts from your wrist

Measure your blood oxygen with an all-new sensor and app

Check your heart rhythm with the ECG app

The Always-On Retina display is 2.5x brighter outdoors when your wrist is down

S6 SiP is up to 20% faster than Series 5

5GHz Wi-Fi and U1 Ultra Wideband chip

Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhone

Measure workouts like running, walking, cycling, yoga, swimming, and dance

Swimproof design

Sync your favorite music, podcasts, and audiobooks

Pay instantly and securely from your wrist with Apple Pay

High and low heart rate notifications and irregular heart rhythm notification

Built-in compass and real-time elevation readings

Can detect if you've taken a hard fall, then automatically call emergency services for you

Emergency SOS lets you get help from your wrist

watchOS 7 with sleep tracking, cycling directions, updates to Siri, and new customizable watch faces