- 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
