Apple Watch Ultra 4 is here, debuting alongside the iPhone Duo and iPhone 18 Pro. The new model features the powerful S11 chip and improved battery life, lasting up to 50 hours normally or 84 hours in Low Power Mode. Apple also claims the most accurate heart rate sensing in a wearable, with a redesigned sensor array.

Health features are enhanced with machine learning for more accurate step and distance tracking, plus new Apple Intelligence capabilities like Sound Recognition and Live Rewind for conversations. The accompanying Health app on iOS 27 adds Insights and Longevity tabs, along with a Health Age metric.

Design remains familiar, but new band colors and a titanium Hermes band are introduced. Overall, the Apple Watch Ultra 4 offers a compelling upgrade with better performance, battery, and health tracking, all in a trusted package.