46mm or 42mm aluminum or titanium case size

LTPO3 OLED Always‑On Retina display

Wide-angle OLED

Up to 2000 nits

Up to 40% brighter when viewed at an angle

ECG app ¹

High and low heart rate notifications ¹

Irregular rhythm notifications ²

Low cardio fitness notifications

Sleep Tracking

Sleep apnea notifications ³

Vitals app featuring heart rate, respiratory rate, wrist temperature, and sleep duration ⁴

Temperature sensing ⁵

Cycle Tracking with retrospective ovulation estimates ⁶

Emergency SOS ⁷

International emergency calling ⁸

Fall Detection and Crash Detection ^{7, 9}

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Water resistant ¹¹

Swimproof ¹¹

Depth gauge to 6m

Water temperature sensor

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GPS

Available cellular connectivity ¹³

S10 SiP

Double tap gesture

Faster on-device Siri with health data access ¹⁵

Precision Finding for iPhone ¹⁶

Apple Watch Up to 18 hours normal use ¹⁸

Up to 36 hours in Low Power Mode ¹⁸

Faster charging (0–80% in about 30 minutes) ²⁰