Apple Inc. is restoring the blood oxygen tracking feature on its smartwatches in the US, as announced on August 14, 2025. This development follows a US Customs and Border Protection decision and comes after the feature was removed due to a patent infringement lawsuit filed by Masimo Corp. and a US Customs injunction.
The reintroduction will occur through iOS 18.6.1 and watchOS 11.6.1 software updates, with a workaround that displays the data on an iPhone rather than directly within the Apple Watch blood oxygen app. This allows Apple to circumvent the previous block.
Masimo had sued US Customs and Border Protection over this decision, indicating the ongoing legal complexities. The return of this feature to Apple Watches could impact the competitive landscape for health monitoring devices.
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