Overnight spO2 is Interesting but why is it not displayed in the app? So you can see changes over time... : r/fitbit
Fitbit Sense, Versa 3 & 2 - Now has SpO2! - YouTube
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How to use your Fitbit to monitor your blood oxygen levels - The Verge
Fitbit rolling out Charge 4 update with on-device SpO2 app - 9to5Google
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How do I track my estimated oxygen variation in the Fitbit app?
Are pulse oximeters on fitness trackers reliable? The best wearables for measuring blood oxygen saturation | Expert Reviews
