Apple Watch Ultra 4 GPS + Cellular 49mm Black Titanium Case Translucent Black Ocean Band

The Apple Watch Ultra 4 (MJAY4X/A) is the ultimate running and sports watch with multiday battery life to go the distance(2). It delivers game-changing health and fitness tracking, enabled by the most accurate heart rate sensing in a wearable(1). With high-frequency HRV readings for insights on stress, recovery and your readiness to take on the day. And now every day is more effortless with Siri AI(3) and Audio Intelligence(4). 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(5). And you can fast-charge in just 15 minutes for up to 18 hours of use(6). Better understand your body with advanced health insights. View your overnight health metrics with the Vitals app(7) and get a daily sleep score, track your menstrual cycle(8) and take readings of your blood oxygen(9).

Disclaimers:
Apple Watch Ultra 4 requires iPhone 11 or later with iOS 27 or later.
(1) Based on Apple-conducted study of heart rate accuracy, August 2026
(2) Battery life varies by use and configuration
(3) Apple Intelligence is available with Siri and device language set to Chinese (Simplified), Chinese (Traditional), Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish or Vietnamese. Some features may not be available in all regions or languages. Siri AI is available in beta in watchOS 27 and requires an Apple Intelligence–enabled device set to a supported language. Certain Apple Intelligence features that rely on server-side models are subject to daily usage limits, including but not limited to Siri AI. Daily limits may vary by feature, request complexity, system demand, system policies and other factors. Expanded access to such features will be available for a fee in the future.
(4) Audio Intelligence includes Live Rewind, Siri Recap, Sound Recognition and faster Shazam. Live Rewind and Siri Recap will be available in beta in late 2026 and require an Apple Intelligence–enabled iPhone 16 or later (excluding iPhone 16e). Certain Audio Intelligence features that rely on server-side models are subject to daily usage limits, including but not limited to Live Rewind and Siri Recap.
(5) Workout tested without iPhone and with heart rate sensor on during outdoor run workout sessions. Extended Workout and Max Extended Workout turn on Low Power Mode during the workout and turns off alerts and splits; certain metrics will be unavailable. Battery life varies by use, configuration, mobile network, signal strength and many other factors; actual results will vary.
(6) Charge time varies with adapter, region, settings, initial battery levels, usage and environmental factors; actual results will vary.
(7) The Vitals app is for wellness purposes only and not for medical use.
(8) 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.
(9) The Blood Oxygen app is for wellness purposes only and not for medical use.
(10) Emergency SOS and Find My via satellite are included for free for two years. Connection and response times vary based on location, site conditions and other factors. Find My via satellite requires a carrier plan. Satellite connectivity is provided by Globalstar and its affiliates.
(11) Apple Watch Ultra models have a water resistance rating of 100m under ISO standard 22810:2010. They may be used for recreational scuba diving (with compatible third-party app from the App Store) to 40m 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. Watch Ultra models are rated IP6X dust-resistant.
(12) Carrier plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability. International roaming is not supported.