Apple Watch Ultra 4: Everything You Need to Know

Apple has unveiled the Apple Watch Ultra 4, its latest high-end smartwatch designed for athletes, outdoor enthusiasts, and users who want Apple's most capable wearable. The new model builds on the Ultra lineup with a redesigned health-sensing system, improved performance, longer battery life, and more advanced fitness features.

A More Powerful Apple Watch Ultra

The Apple Watch Ultra 4 retains the rugged design that has made the Ultra lineup popular, but Apple has upgraded several important components inside the watch. At the heart of the new model is Apple's S11 chip, which improves performance and power efficiency. The combination of the new processor and larger battery allows Ultra 4 to deliver up to 45 hours of outdoor workout tracking, according to Apple.

New Health Sensing System

One of the biggest changes is Apple's new Health Sensing System. The redesigned sensor architecture includes larger, more power-efficient green LEDs and improved photodiodes to enhance heart-rate measurements. Apple Watch Ultra 4 can now measure heart rate every five seconds throughout the day, providing significantly more frequent data than previous models.

The improved system also enables higher-frequency heart-rate variability (HRV) measurements and provides additional information designed to help users better understand their fitness and recovery.

New Readiness Score

Apple is also introducing a Readiness score, designed to help users understand how prepared their body may be for physical activity. The feature uses health and fitness data collected by Apple Watch to provide a broader picture of recovery and readiness. For athletes and people who regularly train, this could make the Ultra 4 more useful as a dedicated fitness companion.

Longer Battery Life

Battery life has always been an important advantage of the Ultra series, and Apple is pushing it further with the Ultra 4. Apple says the watch can provide up to 45 hours of outdoor workout tracking, making it better suited to long adventures, races, hiking trips, and extended training sessions. That improvement could be particularly valuable for users who spend long periods away from a charger.

Built for Athletes and Adventure

The Apple Watch Ultra 4 continues to focus heavily on sports and outdoor activities. Users get advanced workout tracking, GPS capabilities, heart-rate monitoring, and fitness metrics designed for runners, cyclists, hikers, and other athletes. Apple is positioning the Ultra 4 as a watch that can move between everyday use and demanding outdoor activities without requiring users to switch devices.

A Stronger Choice for Fitness

With more frequent heart-rate measurements, improved HRV tracking, readiness insights, and longer battery life, the Ultra 4 is more focused than ever on fitness and recovery. The new features also complement Apple's broader health ecosystem, where users can review trends and health information through the Health app on iPhone.

Apple Watch Ultra 4 Price

The Apple Watch Ultra 4 starts at $799 in the United States and is available in Natural Titanium and Black Titanium finishes. Apple introduced the Ultra 4 in September 2026 alongside the Apple Watch Series 12.

Should You Buy Apple Watch Ultra 4?

The Apple Watch Ultra 4 is aimed at users who want more than a traditional smartwatch. Its biggest advantages are the rugged design, S11 chip, improved health sensors, more frequent heart-rate readings, readiness insights, and longer battery life.

For Ultra 3 owners, the upgrade may depend on how valuable the new health and battery improvements are. However, users coming from an older Apple Watch could see a much bigger difference.

Final Thoughts

The Apple Watch Ultra 4 is an evolution of Apple's premium smartwatch rather than a complete redesign. Apple has concentrated on the areas that matter most to serious athletes and outdoor users: health tracking, fitness data, performance, and battery life.

With its redesigned Health Sensing System and up to 45 hours of outdoor workout tracking, Ultra 4 is Apple's most capable Apple Watch yet.