Apple Watch Ultra 4

49 mm, Titanium

130 - 210 mm, Fluoroelastomer, Nylon Weave, Titanium, Woven Textile

44 x 12 x 49 mm

IP6X, 10 ATM, MIL-STD-810H certified, EN13319 dive certified

Black, Natural

1.98-inch

Retina LTPO3 OLED

514 x 422 px, 326 PPI

Up to 3000 nits

Sapphire Crystal

5.3

Wi-Fi 4, dual-band

Yes

Yes

A-GPS (dual-band L1+L5), BDS, Galileo, GLONASS, QZSS

iPhone 11 or later, iPhone SE (2nd generation or later), iOS 27 or later

Apple Watch app, Health app, Fitness app

Apple S11

64GB storage

Yes (dual speaker)

Yes (triple mics)

Optical Heart Rate, SpO2, ECG, Accelerometer, Gyroscope, Compass, Altimeter, Ambient Light, Depth Gauge, Water Temperature

24/7 Heart Rate, SpO2 (Blood Oxygen), Blood Pressure, Sleep Tracking, Women's Health

100+ workout modes

Up to 50 hours (typical), 84 hours (battery saver)

Wireless charging, 80% in 45 min

Emergency Siren, GPS Backtrack Navigation, On-Device Sound Recognition