Technical specifications: Go to apple.com/ie/watch/compare for complete set.

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

¹Based on Apple-conducted study of heart rate accuracy, August 2026. Visit apple.com/ie/HRAccuracy.

²Battery life varies by use and configuration. See apple.com/ie/watch/battery for more information.

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 pre production Apple Watch Ultra 4; all devices tested with pre release software. Battery life varies by use, configuration, mobile 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.

⁶The 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. Measurements are calculated and viewed on iPhone in the Health app. The Blood Oxygen app is available on Apple Watch Series 6 and later (excluding Apple Watch SE models) and all Apple Watch Ultra models.

⁸Emergency SOS requires a satellite connection, 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 mobile service is available. Some mobile 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 mobile network, if it isn’t set up for mobile service, or if the mobile network does not support emergency calling over IMS. See support.apple.com/en-ie/108374 and apple.com/ie/watch/cellular for more information.

⁹Emergency SOS and Find My via satellite are included for free for two years with the activation of Apple Watch Ultra 3 or later. Connection and response times vary based on location, site conditions and other factors. Find My via satellite requires a mobile plan. Satellite connectivity provided by Globalstar and its affiliates. See support.apple.com/en-ie/123924 for more information.

¹⁰Apple Watch Ultra models have a water resistance rating of 100 metres under ISO standard 22810:2010. They may be used for recreational scuba diving (with compatible third party app from the App Store) to 40 metres and high speed water sports. They should not be used below 40 metres. Water resistance is not a permanent condition and can diminish over time. For more information, see support.apple.com/en-ie/109522. Apple Watch Ultra models are rated IP6X dust resistant.

¹¹Wireless service plan required for mobile service. Contact your service provider for more details. Connection may vary based on network availability. Check apple.com/ie/watch/cellular for participating network providers and eligibility. See support.apple.com/en-ie/HT207578 for additional setup instructions.