Apple Watch Ultra 3

49mm titanium case

Always-On Retina display

Up to 3000 nits

Wide-angle OLED

LTPO3

Hypertension notifications Footnote 3

ECG app Footnote 4

High and low heart rate notifications

Irregular rhythm notifications Footnote 5

Low cardio fitness notifications

Blood Oxygen app Footnote 6

Sleep Tracking

Sleep apnea notifications Footnote 7

Sleep score

Vitals app featuring heart rate, respiratory rate, wrist temperature, and sleep duration Footnote 8

Temperature sensing Footnote 9

Cycle Tracking with retrospective ovulation estimates Footnote 10

Emergency SOS Footnote 11

Emergency SOS via satellite Footnote 23

International emergency calling Footnote 12

Fall Detection and Crash Detection Footnote 11

Siren

Water resistant 100m Footnote 24

Swim, snorkel, scuba, high-speed water sports

Depth gauge to 40m

Water temperature sensor

Precision dual‑frequency GPS

Cellular and satellite Footnote 2,  Footnote 23

5G capable Footnote 1

S10 chip

Wrist flick gesture

Double tap gesture

On‑device Siri with health data access Footnote 14

Precision Finding for iPhone Footnote 15

Up to 42 hours Footnote 25

Up to 72 hours in Low Power Mode Footnote 25

Fast-charge capable
(0–80% in about 45 minutes Footnote 26; 15 minutes for up to 12 hours Footnote 27)