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Apple's newest creation, the Apple Watch Ultra 4, is designed to cater to both mountaineers and those embracing an active lifestyle. For the everyday individual, this rugged watch is a testament to Apple's commitment to performance. The Apple Watch Ultra 4 introduces a new heart rate monitor, a readiness score to guide you on when to push your limits and when to rest, extended battery life, and enhanced Audio Intelligence features.

Under the hood, Apple has incorporated a more powerful S11 chip that supports AI functionalities. The watch measures up to 50 hours on a single charge, a significant improvement from the previous 42 hours.

Upon testing, I wore the Apple Watch Ultra 4 for a 22-mile run to assess its heart rate monitor against a physical chest strap. The results were promising, with the Ultra 4's heart rate monitor proving to be more accurate and responsive than its predecessor, the Apple Watch Ultra 3. The redesigned heart rate sensor boasts a "32-petal design," with larger and more powerful green LED lights that measure heart rate by shining light into the skin.

This enhancement is particularly beneficial for those with different skin tones and can provide more precise readings.

Incorporated within the new holistic sensors, the Ultra 4 now measures heart rate and Heart Rate Variability (HRV) more frequently, enabling more accurate insights into recovery and overall health. The watch also supports a new Readiness score and Health Age metric, providing a more comprehensive view of your health. Additionally, with the integration of Siri AI voice assistance and Audio Intelligence features, the Ultra 4 offers users a more intuitive and interactive experience, helping them recall important details from their daily lives.

Despite the similarities in design, the Apple Watch Ultra 4 presents significant upgrades that make it a worthy upgrade for existing Ultra 3 users.