The Apple Watch blood-oxygen sensor is coming back to Series 9, 10, and Ultra 2 users

Macworld
Aug 14, 2025, 10:05 am258 pts
Macworld Early last year, Apple made the bold decision to remove the blood-oxygen sensor from the Apple Watch Series 9 and Ultra 2 in the U.S. over a patent dispute with medical technology company Masimo. Since then, all new watches (including the Series 10, which launched several months later) have shipped…

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