Apple Watch Ultra 4 Ocean Band Kelp (Black Titanium)

About the Apple Watch Ultra 4 Ocean Band Kelp (Black Titanium)

The most robust and capable Apple Watch

49mm titanium case (100% recycled), in natural titanium and black titanium finishes. S11 chip for more autonomy, faster charging, and the most accurate heart rate reading on a wrist device.

More than two days of battery life

Up to 50 hours of normal use and up to 84 hours in low power mode. 15 minutes of charging provides up to 18 hours of battery life. Extended workout mode up to 25 hours with GPS and heart rate, and up to 45 hours for runs, hikes, and trails.

Health Sensing System

New optical and electrical heart sensors: heart rate measured every five seconds, all day, and heart rate variability up to 24 times more often than before. Readiness Score from 0 to 10 with recommendations (Recover, Moderate, Ready, Go all out).

GPS and steps

The most accurate GPS in a sports watch and the most precise step count of any smartwatch, according to Apple.

watchOS 27

With Apple Intelligence and the revamped Siri. Trail Loop, Alpine Loop, and Ocean Band straps in various colors.

Availability

Available from September 18, 2026.