The Apple Watch Ultra 4 arrives four years after the original model. Across three subsequent generations, Apple added a brighter and larger display, satellite connectivity, new health sensors, more capable chips, and longer battery life. For owners of the original Ultra, are those cumulative improvements enough to justify upgrading now, or can their existing watch last another year? Both watches retain a 49mm titanium case, an Action button, a siren, dual-frequency GPS, and support for recreational diving to 40 meters. The Apple Watch Ultra 4 starts at $799 in the U.S. Apple discontinued the original Ultra in 2023, and it no longer supports the latest major watchOS release. Here are the key differences between the two models: Apple Watch Ultra (first-generation) Apple Watch Ultra 4
Wide-angle LTPO3 OLED display with 1Hz always-on updates, allowing supported faces to show ticking seconds
422 by 514 pixels; 1,245 sq mm display area (5% larger), with thinner display borders
On-device Siri for supported requests, including access to and logging of health and fitness data
Play a sound to locate an iPhone; locate accessories using Find Devices and Find Items
Precision Finding for compatible iPhone models, AirTag 2, and the AirPods Pro 3 charging case, with distance and direction guidance
Automatic Now Playing controls and Smart Stack media suggestions when near a HomePod
On affected U.S. models, Blood Oxygen readings are analyzed on the paired iPhone and viewed in its Health app
More accurate all-day step tracking and indoor workout distance measurements, plus a Steps watch-face complication
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