Compare all Models

44mm or 40mm
aluminum case

46mm or 42mm
aluminum or titanium case

49mm
titanium case

LTPO OLED Retina display

Up to 1000 nits

Wide-angle Always-On Retina display
Up to 2000 nits

Up to 40% brighter when viewed at an angle

LTPO2 OLED Always-on Retina display

Up to 3000 nits

High and low
heart rate notifications

Irregular rhythm
notifications

Low cardio fitness
notifications

ECG app

High and low
heart rate notifications

Irregular rhythm
notifications

Low cardio fitness
notifications

ECG app

High and low
heart rate notifications

Irregular rhythm
notifications

Low cardio fitness
notifications

Sleep tracking

Sleep tracking

Sleep apnea notifications

Sleep tracking
Sleep apnea notifications

Vitals app featuring heart rate, respiratory rate, and sleep duration

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

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

Cycle Tracking

Temperature sensing

Cycle Tracking with retrospective ovulation estimates

Temperature sensing

Cycle Tracking with retrospective ovulation estimates

Emergency SOS

International
emergency calling

Fall Detection
and Crash Detection

Emergency SOS

International
emergency calling

Fall Detection
and Crash Detection

Emergency SOS

International
emergency calling

Fall Detection
and Crash Detection

Siren

50m

Water resistant

Swimproof

50m
Water resistant
Swimproof

Depth gauge to 6m

Water temperature sensor

100m

Water resistant

Swimproof

Depth gauge to 40m

Water temperature sensor

High-speed water sports

Recreational scuba to 40m

S8 SiP

Siri

Find iPhone

S10 SiP

Double tap gesture

On-device Siri with health data access

Precision Finding for iPhone

S10 SiP

Double tap gesture

Fast on-device Siri with health data access

Precision Finding
for iPhone

GPS

Cellular and Wi-Fi only options

GPS

Cellular and Wi-Fi only options

Precision dual-frequency GPS

Cellular

Up to 18 hours

Low Power Mode

245 mAh 40mm
296 mAh 44mm

Up to 18 hours

Up to 36 hours in Low Power Mode

Fast charging
293 mAh 42mm
327 mAh 46mm

Up to 36 hours

Up to 72 hours in
Low Power Mode

Fast charging
(0–80% in about 1 hour)
564 mAh