The Apple Watch Ultra 4 is now available for pre-order, bringing a new health sensing system, more memory, and longer battery life over its predecessor. Last year, the Apple Watch Ultra 3 introduced a larger, more efficient display, satellite connectivity, 5G, and improved battery life. The Ultra 4 retains the same basic design and display, but focuses on more detailed health and fitness insights, new Audio Intelligence features, and further battery life improvements.

It launches on Friday, September 18, at the same $799 starting price as the Ultra 3. The comparison below outlines the differences between the two generations: Apple Watch Ultra 3 features the S10 chip (2024) with 2GB RAM, while the Ultra 4 features the S11 chip (2026) with 4GB RAM. Both models retain the natural titanium weighing 61.6 grams and black titanium at 61.8 grams. The Ultra 4 introduces a second-generation electrical heart sensor and a new "Health Sensing System," offering more detailed metrics including HRV recovery and a daytime vitals view. Battery life sees significant upgrades, with the Ultra 4 reaching up to 84 hours in Low Power Mode compared to the Ultra 3's 42 hours. Audio Intelligence features on the Ultra 4 include Live Rewind and Siri Recap.

Is It Worth Upgrading From Ultra 3 to Ultra 4? For the vast majority of Apple Watch Ultra 3 owners, the Ultra 4 is not worth upgrading to. The Ultra 3 already offers all of the headline display, durability, satellite connectivity, and established health features. If it comfortably lasts between your usual charging sessions and records your longest workouts, the new model is unlikely to meaningfully change how you use your watch. The strongest reason to upgrade is if you want recovery tracking to play a larger role in your training. The Ultra 4's more frequent measurements feed into Readiness and Recovery HRV, making it easier to assess when to push harder or take a lighter day. These features are more compelling if you will regularly use them to adjust your training, rather than simply check another set of health metrics. Battery life is a more practical reason for endurance athletes. If you currently change settings to finish long events or recharge during an extended outing, the Ultra 4 gives you a little more flexibility.