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Apple Watch Series 12
9to5Mac • • technology
Key Points:
- The Apple Watch Series 12 features a completely revamped heart rate sensor that measures heart rate every five seconds, even when the user is inactive, providing more detailed daily heart rate insights.
- In tests by Rob ter Horst from The Quantified Scientist, the Series 12's heart rate readings closely matched those of the Polar H10 ECG chest strap, especially during indoor cycling with nearly perfect correlation.
- The watch performed well during running with a 0.98 correlation, although minor deviations occurred at higher heart rates, and showed a 0.97 correlation during weightlifting, which is challenging for wrist-based sensors.
- Compared to the Apple Watch Series 11, the Series 12 delivered similar heart rate accuracy overall, with the older model slightly outperforming it in running tests, suggesting Apple may still be refining the new sensor's algorithms.
- The Series 12's step counter was tested with about 5,000 manually counted steps and was found to be generally accurate or slightly overcounting.
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