As of Thursday, Jan. 18, all newly purchased Apple Watches will no longer have the once-standard ability to detect blood oxygen level.

The change comes on the heels of Apple’s failure to convince a U.S. appeals court that its Watch contained original pulse oximetry technology.

For consumers expecting comprehensive health tracking, the stripped-down functionality represents a major step backward.

What Happened?

Medical technology company Masimo first filed a lawsuit against Apple in January 2020, accusing the tech giant of misappropriating trade secrets and improperly using Masimo’s proprietary technology. Specifically, Masimo claimed that Apple had poached former employees and then leveraged their knowledge to develop the blood oxygen monitoring sensors used in Apple Watches.

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