Apple Watch Ultra 4 displaying enhanced health features, including heart rate and step tracking, on wrist.

Apple Watch Ultra 4: Two-Day Battery, Enhanced Health Features, and New Audio Intelligence

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Written by Flynn Matthews

2026-09-09

Today, Apple introduced the Apple Watch Ultra 4, equipped with the new S11 chip and significant upgrades in health tracking and power efficiency. With cutting-edge wellness options, it is designed with a more robust battery, boasting up to two days of use on a single charge, while maintaining 18 hours of intensive workout tracking or 45 hours in extended mode. Now available in Black and Natural titanium, the watch also offers new band options, including a premium titanium Hermès variant.

Innovative Health Tracking Advancements with Advanced Monitoring

The Ultra 4 incorporates a revamped health sensing system. The larger electrode surface enhances ECG reading accuracy, while an improved array of photodiodes and green LEDs ensure precise heart rate monitoring. These advancements were cited in a substantial study demonstrating the system’s accuracy through various physical activities, using ECG chest straps as benchmarks. Additionally, a new Readiness feature evaluates your previous day’s activities and sleep to indicate if you should recover, pace yourself, or take on more activity.

Close-up of Apple Watch Ultra 4 showing heart rate sensor in action on wrist.
Apple Watch Ultra 4 heart rate sensing

The Evolving Health App

Apple’s Health app is also undergoing a transformation, integrating personalized guidance powered by Apple Intelligence. As part of its new functionalities, the Health Age feature compares your health metrics—such as VO2 max and sleep data—against your chronological age. U.S. users can access a Quest blood panel that analyzes over 50 biomarkers for $119, further enriching health insights. A new VO2 max test uses the iPhone’s camera to deliver instant results after completing a set task. This updated app will launch later this year.

To explore more about technological innovation, check out how SonicGlass A1 revolutionizes music experiences with transparent visuals and dynamic lyrics.

Apple Watch Ultra 4 displaying step count on digital screen against outdoor backdrop.
Apple Watch Ultra 4 step counts

Audio Intelligence and Upcoming Features

Featuring the S11’s energy-efficient always-on processor, the Apple Watch Ultra 4 introduces innovative audio capabilities. The Sound Recognition feature identifies environmental sounds like alarms and can transcribe recent conversations. These groundbreaking functionalities also include Siri Recap, another creative addition, generating summaries of conversations, set to debut in English later this year.

Starting at $799, the Apple Watch Ultra 4 is available for pre-order today, with official sales beginning on September 18. This launch continues to push the boundaries of wearable technology, blending enhanced utility with cutting-edge health insights, underpinned by new technological features.

Source: macrumors.com

Frequently asked questions

What is the battery life of the Apple Watch Ultra 4?

The Apple Watch Ultra 4 boasts up to two days of use on a single charge, maintaining 18 hours of intensive workout tracking or 45 hours in extended mode.

What metal options are available for the Apple Watch Ultra 4?

The Apple Watch Ultra 4 is available in Black and Natural titanium, with new band options including a premium titanium Hermès variant.

What study confirms the accuracy of Apple Watch Ultra 4’s health system?

A substantial study demonstrated the system’s accuracy through various physical activities, using ECG chest straps as benchmarks.