LTPO3 OLED Always‑On Retina display

Wide‑angle OLED

Up to 40% brighter when viewed at an angle

Edge‑to‑edge display

Ion‑X front glass (aluminum cases)

Sapphire front crystal (titanium cases)

Up to 2000 nits maximum brightness

1 nit minimum brightness

326 pixels per inch

ECG app2

Cycle Tracking app with retrospective ovulation estimates3

Heart Rate app

High and low heart rate notifications

Irregular rhythm notifications4

Medications app

Mindfulness app with state of mind tracking

Noise app

Sleep app including sleep stages

Sleep apnea notifications5

All‑day battery life, up to 18 hours of normal use6

Up to 36 hours in Low Power Mode6

Built‑in rechargable lithium‑ion battery

Fast‑charge capable7

Up to 80% charge in about 30 minutes7

15 minutes for up to 8 hours of normal use

8 minutes for up to 8 hours of sleep tracking

Electrical heart sensor

Third‑generation optical heart sensor

Temperature sensor1

Compass

Always‑on altimeter

High‑g accelerometer

High dynamic range gyroscope

Ambient light sensor

Depth gauge

Water temperature sensor

watchOS 11

Water resistance 50m (swimproof)10

Dust resistance IP6X11

L1 GPS, GLONASS, Galileo, QZSS, and BeiDou

LTE and UMTS12

Wi-Fi 4 (802.11n)

Bluetooth 5.3

Second-generation Ultra Wideband chip13

Apple Pay

GymKit

Support for Apple Watch For Your Kids14

International roaming15