The Apple Watch Ultra 4 isn't a radical aesthetic redesign, but it doesn't need to be. Apple's rugged smartwatch keeps the familiar 49mm titanium build, bright display, and customizable Action Button, while upgrades to its rear health sensors and internals make it a more capable companion for everyday wear and endurance workouts.

The biggest upgrade is arguably its battery life. Apple promises up to 50 hours of normal use, but I've easily managed two days with the Always-On display enabled and sleep tracking running overnight. That's seriously impressive for a fully featured smartwatch, even if some lower-power rivals like the best Garmin watches can last longer.

The new S11 chip keeps everything feeling responsive, with apps opening quickly and watchOS 27 running smoothly. Faster charging is another welcome addition, letting me replenish around 30% of the battery in just 15 to 20 minutes.

Health and fitness tracking also gets a meaningful boost. The new Health Sensing System improves measurements, and Readiness Score is one of my favorite additions to watchOS 27. It gives you a useful snapshot of how prepared you might be for the day, without requiring another subscription.

It also adds plenty of smaller quality-of-life improvements, including real-time step-count complications. Siri AI also brings more intelligence to the wrist, with features like Shazam and Sound Recognition. Siri Rewind and Live Recap have yet to arrive and prove themselves.

The downside is that the Ultra 4 looks and feels much like its predecessor, so Ultra 3 owners may not find enough here to justify an immediate upgrade.

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