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Apple Watch Ultra 4: Health Sensors Revolutionized
9 Sep
Summary
- New Health Sensing System captures heart rate 24 times more frequently.
- Audio Intelligence features sound recognition and live audio transcripts.
- New model is available starting at $799 with over 2 days battery life.

The new Apple Watch Ultra 4 enhances athlete and casual user experiences with significant sensor updates and new software features. Its "Health Sensing System" includes a redesigned photoplethysmogram (PPG) sensor, capturing live heart rate data 24 times more frequently, marking it as the most accurate heart rate sensor in a wearable.
Software improvements include an updated Heart Rate and Vitals app, a new Readiness score visible on the watch and in the Health app with Apple Intelligence summaries. The Ultra 4 also introduces "Audio Intelligence" via its microphone. Features like Sound Recognition and Live Rewind, which provides live transcripts, aim to assist users, especially those with hearing impairments. Siri Recap can also provide daily audio summaries.
Powered by the new S11 chip, the Apple Watch Ultra 4 enables on-device Apple Intelligence and offers extended battery life of over two days, or up to 45 hours in Max Extended mode. Available in natural and black titanium, it starts at $799, the same price as the previous model. Pre-orders are open now for availability on September 18.