- TPO3 OLED Always‑On Retina display
Wide-angle OLED
Up to 2000 nits
Up to 40% brighter when viewed at an angle - ECG app1
High and low heart rate notifications1
Irregular rhythm notifications2
Low cardio fitness notifications - Sleep Tracking
Sleep apnea notifications3 - Vitals app featuring heart rate, respiratory rate, wrist temperature, and sleep duration4
- Temperature sensing5
- Cycle Tracking with retrospective ovulation estimates6
- Emergency SOS7
International emergency calling8
Fall Detection and Crash Detection7, 9 - Up to 18 hours normal use18
Up to 36 hours in Low Power Mode18