Advanced health and recovery insights
The all-new Sensing System uses redesigned optical and electrical sensors together with the S11 chip for higher-frequency heart monitoring. Ultra 4 can take background heart rate readings every five seconds and measure HRV as often as every five minutes. The new Readiness experience combines activity, vitals, and sleep data into a simple score to help you understand your capacity for training and everyday activity.
Built for serious training
Precision dual-frequency GPS and advanced workout metrics make Ultra 4 particularly capable for running and endurance sports. Track running power, cadence, pace, Heart Rate Zones, VO2 max estimates, training load, and more. Pacer, Race Route, Automatic Track Detection, Custom Workouts, and the customizable Action button provide additional tools for structured training.
Up to 50 hours of battery life
Ultra 4 offers up to 50 hours of normal use and up to 84 hours in Low Power Mode. For long-distance events, it provides up to 18 hours of standard workout tracking or up to 45 hours with Max Extended Workout tracking – enough for exceptionally long endurance activities.
More than a running watch
Multisport mode can automatically recognize transitions between swimming, cycling, and running, making it suitable for triathlon training. Cycling features include Power Zones and support for compatible power meters, while swimming functions can automatically detect strokes, calculate sets, distance and pace, and provide advanced metrics such as SWOLF.
Ready for outdoor adventures
Ultra 4 provides dedicated tools for hiking and exploration, including Compass waypoints, Backtrack, custom routes, turn-by-turn directions, and offline maps. With 100-metre water resistance, it can also be used for recreational scuba diving down to 40 metres with a compatible third-party app. IP6X dust resistance adds protection for demanding outdoor environments.
Advanced health monitoring
Beyond everyday activity tracking, Ultra 4 offers sleep scoring, sleep apnea and hypertension notifications, ECG, Blood Oxygen, high and low heart rate notifications, irregular rhythm notifications, Cycle Tracking, and detailed HRV information. Availability and intended use of individual health features may vary by region and user eligibility.
Siri AI and Audio Intelligence
Powered by the S11 chip, Siri AI enables more natural voice interactions and can use broader knowledge and personal context. Audio Intelligence adds features such as Sound Recognition and faster Shazam, while Live Rewind and Siri Recap are planned for beta availability later in 2026. Feature availability depends on language, region, and compatible Apple Intelligence hardware.
Stay connected beyond cellular coverage
Built-in satellite communication helps Ultra 4 maintain essential connectivity when cellular and Wi-Fi networks are unavailable. Supported functions include Emergency SOS, Messages, and Find My via satellite. Cellular connectivity also supports 5G for calls, messages, app downloads, and music or podcast streaming where supported by the carrier.
Designed for demanding conditions
The durable 49mm titanium case is available in natural or black titanium and features a wide-angle Always-On Retina display with up to 3000 nits of brightness. Safety features include Fall Detection, Crash Detection, Emergency SOS, Medical ID, a built-in flashlight, and a powerful emergency siren that can be heard from up to approximately 180 metres away.