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Apple Watch Series 12 and Ultra 4 unveiled with upgraded health tracking system

2026-09-09 | original

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Why This Matters

Apple's new Watch Series 12 and Ultra 4 lean on sensing and on-device AI rather than redesigns, with a heart rate sensor sampling 60x more often, HRV readings every five minutes, and a new Readiness score — pushing Apple further into the health-analytics territory Oura and Whoop occupy. A new Audio Intelligence layer, including sound recognition, a 15-second live rewind transcription, and Siri recaps, repurposes the Digital Crown double-click away from multitasking. The S11 chip, derived from A20 Pro CPU/GPU/Neural Engine components, signals that wearables are becoming meaningful AI compute devices.

Key Takeaways

Health is the headline: 5-second heart rate sampling, 5-minute HRV, and a new Readiness score combining activity, vitals, and sleep.
Audio Intelligence adds sound recognition, 15-second live rewind transcription, and Siri meeting recaps — with the Digital Crown double-click reassigned from multitasking.
New S11 chip borrows A20 Pro CPU, GPU, and Neural Engine tech; Ultra 4 gains a larger battery rated for over two days.

Worth a Look

Apple Watch Ultra 2 — If the new health tracking upgrades have you eyeing an Apple Watch, the Ultra line is the rugged, titanium-cased option built for long days of workouts, sleep tracking, and outdoor adventures. It pairs with iPhone for heart rate, activity, and sleep insights, plus the Action Button and Digital Crown controls referenced in Apple's latest models.

See Apple Watch Ultra 2 on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.

Apple Watch Series 12 and Apple Watch Ultra 4 are official. Apple has announced its two new Apple Watch models as part of its product event today. An upgraded health tracking system is key to both models.

Apple Watch Series 12 and Ultra 4 details

While both new models feature a familiar design, an upgraded heart rate monitor is key to the new health sensing system.

For example, the new system now measures heart rate data every five seconds, a 60x frequency increase over previous models.

Apple is also measuring HRV every five minutes. The new system is called the most accurate heart rate sensor in a wearable, according to Apple.

Apple is also introducing a new readiness feature. This is based on activity, vitals, and sleep data.

Readiness is a new feature based on activity, vitals, and sleep data

Audio Intelligence

Additionally, Apple is adding a new Audio Intelligence feature to Apple Watch Series 12 and Ultra 4.

This includes sound recognition, like doorbells. There’s also a “live rewind” feature that lets you go back 15 seconds to transcribe what someone just said. It’s invoked by double-clicking the Digital Crown, which used to be multitasking.

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