Specifications
  • MULTI-DAY BATTERY LIFE — Ultra 4 is a smartwatch with ultramarathon battery stamina,² perfect for runners to go the distance — with up to 45 hours of Max Extended Workout tracking.³ And you can fast charge in just 15 minutes for up to 18 hours of use. ⁴
  • STAY CLOSER TO YOUR HEART HEALTH — The most accurate heart rate sensing in a wearable,¹ Ultra 4 now measures HRV as often as every five minutes for insights on stress and recovery, and background heart rate readings every five seconds.
  • A FULL-FEATURED HEALTH TRACKER — Better understand your body with advanced health insights. View your overnight health metrics with the Vitals app and get a daily sleep score,⁵ track your menstrual cycle,⁶ and take readings of your blood oxygen.⁷
  • CHECK YOUR READINESS FOR THE DAY — Know when to rest or put yourself to the test. The readiness experience gives you one clear score and can help you determine your capacity to take on the day by analyzing your recent activity, vitals, and sleep. 
  • ULTIMATE RUNNING AND WORKOUT COMPANION — A superior fitness tracker for distance running, triathlons, mountain biking, strength training, and more. Ultra 4 has precision dual-frequency GPS, Pacer, Heart Rate Zones, Custom Workouts, training load, and more.
  • KEEP HELP CLOSE AT HAND — A smartwatch that puts your safety first. Ultra 4 can detect a hard fall or severe car crash.⁸
  • RUGGED AND READY TO GO — Ultra 4 is built for extreme environments with a tough titanium case and a strong sapphire crystal display. Water resistant up to 100m, this smartwatch is great for swimmers, divers, and fans of high-speed water sports.⁹
  • STAY CLOSE TO WHAT YOU CARE ABOUT — With just your smartwatch, you can take and make calls, stream music and podcasts, and listen with your AirPods — even without your iPhone.¹⁰
Legal

Apple Watch Ultra 4 requires iPhone 11 or later with iOS 27 or later.

¹Based on data from an Apple-conducted study of heart rate accuracy, during July and August 2026, utilizing commercially available best-selling wearables available as of June 2026. 

²Battery life varies by use and configuration. 

³Workout tested without iPhone and with heart rate sensor on during outdoor run workout sessions. Extended Workout turns on Low Power Mode during the workout; running form metrics will be unavailable. Max Extended Workout turns on Low Power Mode during the workout, and turns off alerts and splits; certain metrics will be unavailable. Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Ultra 4; all devices tested with prerelease software. Battery life varies by use, configuration, cellular network, signal strength, and many other factors; actual results will vary.

⁴Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Ultra 4 paired with an iPhone; all devices tested with prerelease software, preproduction Apple Watch Magnetic Fast Charger to USB-C Cable (Model A3277), and Apple 20W USB-C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage, and environmental factors; actual results will vary.

⁵The Vitals app is for wellness purposes only and not for medical use.

⁶ The Cycle Tracking app should not be used for birth control or to diagnose a health condition. Cycle deviation notifications inclusive of perimenopause are for people 40 years old or older.

⁷The Blood Oxygen app is for wellness purposes only and not for medical use. 

⁸Emergency SOS requires a cellular connection or Wi-Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that cellular service is available. Some cellular networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular cellular network, if it isn’t set up for cellular service, or if the cellular network does not support emergency calling over IMS. 

⁹Apple Watch Series 2 and later and Apple Watch SE and later have a water resistance rating of 50 meters under ISO standard 22810:2010. This means that they may be used for shallow-water activities like swimming in a pool or ocean. Apple Watch Series 10 and later can also be used for snorkeling to 6 meters. However, they should not be used for scuba diving, waterskiing, or other high-velocity water sports. Apple Watch Ultra models have a water resistance rating of 100 meters under ISO standard 22810:2010. They may be used for recreational scuba diving (with compatible third-party app from the App Store) to 40 meters and high-speed water sports. They should not be used below 40 meters. Water resistance is not a permanent condition and can diminish over time. 

¹⁰Wireless service plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability.

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