Fitbit has finally activated its blood oxygen monitoring feature on its Versa , Versa Lite , Versa 2 , Ionic and Charge 3 wearables, after years of ready, the corporate confirmed to CNET on Wednesday. While Apple nonetheless holds the biggest good watch market share, Fitbit (which Google has agreed to purchase, in a deal expected to shut this yr) beat it to the punch with the release of the blood oxygen monitoring function. Fitbit customers in the US on Wednesday began seeing wireless blood oxygen check oxygen saturation data appear in the app, Tizenhelp first reported. Sensors on the back of the units give users an estimate of the variability of oxygen ranges of their bloodstream. This data is beneficial for detecting variations in breathing whilst you sleep, which may indicate sleep apnea. Apple holds patents for blood oxygen monitoring, but has yet to activate the function in any devices. Back in 2018, Garmin launched Pulse Ox with its Vivosmart 4 activity tracker, permitting customers to gauge their blood oxygen saturation ranges on the spot, or periodically as they sleep. French well being tech company Withings lately unveiled its new ScanWatch, which additionally has comparable monitoring capabilities. However, it is still undergoing FDA clearance, and the company has but to announce when the watch shall be accessible to purchase. Apple did not respond to a request for remark. Read more: Apple Watch Series 5 vs. Originally revealed Jan. 15, 11:29 a.m.