1-3 of about 3 matches for site:9to5mac.com oxygen saturation
https://9to5mac.com/2014/03/17/this-is-healthbook-apples-first-major-s...
to bloodwork, heart rate, hydration, blood pressure, physical activity, nutrition, blood sugar, sleep, respiratory rate, oxygen saturation, and weight
https://9to5mac.com/2015/05/18/apple-readies-first-significant-apple-w...
initially including only a heart rate monitor after other functions, such as as an oxygen saturation monitor , did not
http://9to5mac.com/2015/05/18/apple-readies-first-significant-apple-wa...
initially including only a heart rate monitor after other functions, such as as an oxygen saturation monitor , did not