Apple Watch Ultra 4 - Silver - 49mm

Yes, it is designed for extreme environments, including water-based activities. However, it is not intended for professional scuba diving beyond recreational depths.

Yes, the Apple Watch Ultra 4 supports cellular connectivity, allowing you to make calls, send texts, and stream music independently.

The Readiness score is calculated by the Vitals app. Wear the watch consistently, especially while sleeping, to build an accurate baseline of your health metrics.

Yes, the device supports fast charging, enabling 18 hours of typical use with only 15 minutes of charging time.

The display is protected by a high-grade sapphire crystal, which is highly resistant to scratches and impacts.

Ensure the magnetic charging cable is properly seated and the power adapter is functioning; try a different wall outlet if necessary.

Ensure the watch has a clear view of the sky and is updated to the latest software version. Avoid wearing long sleeves that cover the sensor array.

Check background app refresh settings and reduce screen brightness. Disable Always-On display if maximum endurance is required.