Apple Restores Blood Oxygen Readings on Recent Watches in the US

Apple has reinstated blood oxygen measurements for U.S. owners of the Apple Watch Series 9, Series 10, and Ultra 2 through watchOS 11.6.1 and iOS 18.6.1. The capability, absent since late 2023, now works by shifting data processing and result display to the paired iPhone. The change makes the process less seamless but restores a […]
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