Pre-order Apple Watch Ultra 4
49mm titanium case
Always-On Retina display
Up to 3000 nits
Wide-angle OLED
LTPO3
Recovery HRV
High-frequency background heart rate tracking
Hypertension notifications
ECG app
High and low heart rate notifications
Irregular rhythm notifications
Low cardio fitness notifications
Blood Oxygen app
Sleep tracking
Sleep apnea notifications
Sleep score
Vitals app featuring heart rate, respiratory rate, wrist temperature, sleep duration, and HRV
Wrist temperature sensing
Cycle Tracking
Improved period predictions
Fertile window estimates
Retrospective ovulation estimates
Perimenopause and menopause support
Apple Intelligence
Audio Intelligence
Siri AI
Emergency SOS
Emergency SOS via satellite
International emergency calling
Fall Detection and Crash Detection
Siren
Water resistant 100m
Swim, snorkel, scuba, high-speed water sports
Depth gauge to 40m
Water temperature sensor
Precision dual‑frequency GPS
Cellular and satellite
5G capable
S11 chip
Wrist flick gesture
Single and double tap gestures
Siri AI
Precision Finding for iPhone
Up to 50 hours
Up to 84 hours in Low Power Mode
Fast-charge capable
(0–80% in about 45 minutes ; 15 minutes for up to 18 hours)