GoKawiilApple debuts Watch Ultra 4 with S11 chip and denser heart-rate sensing
Apple unveiled the Apple Watch Ultra 4 at its 'Surprise and shine' event, keeping the rugged design of last year's model but swapping in the new S11 processor and an upgraded ECG and heart-rate sensor. The new sensor takes readings up to 60 times more often, checking heart rate every five seconds and heart rate variability every five minutes.
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The faster chip positions the Ultra 4 to run watchOS 27's overhauled Siri, which Apple showed off at WWDC as a smarter, more conversational assistant that needs more processing power on-device. The denser health sensing also strengthens Apple's pitch to fitness and outdoor users who rely on continuous biometric data.
- Apple Watch Ultra 4 uses the new S11 chip, replacing the S10 from 2024.
- Upgraded sensors enable heart rate checks every 5 seconds and HRV readings every 5 minutes.
- The device is built to support watchOS 27's revamped Siri assistant announced at WWDC.
Apple Watch Ultra 3 — While the Ultra 4 is fresh off the keynote, the Apple Watch Ultra 3 shares nearly the same rugged titanium design and is available right now. It's built for hiking, diving, and long training days, with the bright display and durability the Ultra line is known for.
See Apple Watch Ultra 3 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.Source: theverge.com — Andrew Liszewski, 2026-09-09
Published there as: “The Apple Watch Ultra 4 is ready for the new Siri”
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