Wear OS smartwatches no longer have this leg up over the Apple Watch
Joe Maring / Android Authority TL;DR Apple is restoring blood oxygen tracking to certain US Apple Watch models via iOS and watchOS updates. The refreshed setup uses the watch to take readings but calculates and displays results on the paired iPhone. The feature was removed in January 2024 due to a patent dispute and an import ban. Apple Watch owners in the US are getting a health-tracking feature back that many thought might be gone for good. After more than a year in limbo, the blood oxygen