Apple Watch Ultra 4

The Apple Watch Ultra 4 is a rumored premium smartwatch designed for athletes, outdoor enthusiasts, divers, and users who want advanced health and safety features. It combines a durable titanium design, a bright OLED display, powerful sensors, and satellite emergency communication.

Apple is expected to announce the Apple Watch Ultra 4 on September 9, 2026, with a possible release on September 18, 2026. Therefore, the watch remains rumored until Apple officially confirms the specifications.

Design and Build

The Apple Watch Ultra 4 is expected to feature a Grade 5 titanium frame with a sapphire crystal front and ceramic/sapphire crystal back. As a result, the watch should offer excellent durability for outdoor activities.

Moreover, it carries an IP6X rating and supports water resistance up to 100 meters. It also supports swimming and diving up to 40 meters under the specified standards. In addition, MIL-STD-810H compliance should help it handle demanding environments.

The watch uses an eSIM and supports ECG functionality, although availability can depend on the region and software.

Display

The device is expected to feature a 2.12-inch Retina LTPO3 OLED display with a peak brightness of 3000 nits. Therefore, users should get excellent visibility even in bright outdoor conditions.

Furthermore, the display uses sapphire crystal protection for improved durability. The 514 × 422 pixel resolution delivers sharp visuals, while the wide-angle OLED technology should improve viewing from different angles.

Performance and Software

The Apple Watch Ultra 4 is expected to run watchOS 27 and use the Apple S11 chipset. Its dual-core CPU and PowerVR GPU should provide smooth performance for apps, notifications, fitness tracking, and everyday smartwatch functions.

In addition, Apple may offer 64GB and 128GB storage options. Therefore, users can store more apps, music, and other supported content directly on the watch.

Health and Fitness Features

The Apple Watch Ultra 4 focuses heavily on health and outdoor tracking. It includes continuous heart-rate monitoring, SpO2 tracking, VO2 max measurement, temperature sensing, an accelerometer, gyro, compass, and barometer.

Moreover, the always-on altimeter can measure elevations from -500 meters to 9,000 meters. The watch also includes a depth gauge with ±1-meter accuracy and water temperature sensing with 0.01°C accuracy.

As a result, the device should work well for running, hiking, swimming, diving, and other demanding activities.

Connectivity and Safety

The smartwatch supports Wi-Fi, Bluetooth 6.0, NFC, and multiple satellite positioning systems. Additionally, it includes second-generation Ultra Wideband technology for compatible features.

One of its most important safety features is Emergency SOS via satellite. Therefore, users may have access to emergency communication even when traditional cellular coverage is unavailable, subject to service availability and regional support.

Sound

The Apple Watch Ultra 4 is expected to feature dual speakers capable of producing up to 86-decibel audio. As a result, users should hear calls, alerts, and emergency sounds clearly in outdoor environments.

However, the watch does not include a 3.5mm headphone jack or USB port.

Battery and Charging

Apple has not yet provided a battery capacity for the Apple Watch Ultra 4. However, the listed charging specification indicates wireless charging with a 0–80% charge time of around 45 minutes.

Therefore, users can expect relatively fast charging when the battery needs a quick boost.

Final Thoughts

Overall, the Apple Watch Ultra 4 is shaping up to be a highly capable premium smartwatch with a rugged titanium build, extremely bright display, advanced health sensors, and powerful outdoor features.