Apple Watch Ultra 4 review: longer battery life but still awaiting new features

Biggest Apple smartwatch gets better health tracking and new readiness tools with a battery and chip boost in preparation for controversial audio AI

As the Ultra enters its fourth year as Apple's biggest and beefiest smartwatch it gets the best kind of spec upgrade - longer battery life - while waiting for something potentially more transformative.

That's because several of the key features announced as part of Apple's new smartwatch lineup for 2026 have yet to be enabled, awaiting updates towards the end of this year. That leaves the 749 (899/$799/A$1,349) Apple Watch Ultra 4 the top dog, but basically the same as last year's model.

Case size: 49 x 44mm

Case thickness: 12mm

Weight: 63g

Processor: S11

Storage: 64GB

Operating system: watchOS 27

Water resistance: 100 metres (10ATM)

Connectivity: Bluetooth 5.3, wifi 4, 5G RedCap/4G, UWB

Sensors: HR, ECG, spO2, temp, depth, dual-band GPS, compass, altimeter