- 45mm Stainless Steel
- Carbon neutral combinations available2
- Always-On Retina display Up to 2000 nits
- S9 SiP Double tap gesture11 Faster on-device Siri with health data access11 Precision Finding for iPhone
- Blood Oxygen app12 ECG app13 High and low heart rate notifications Irregular rhythm notifications3 Low cardio fitness notifications
- Temperature sensing14 Cycle Tracking with retrospective ovulation estimates4