Fitbit Estimated Oxygen Variation: SpO2, sleep apnea and blood oxygen explained


In January 2020 Fitbit turned on its long awaited blood oxygen detection feature. Since 2017 it’s been packing an SpO2 sensor into its leading devices, but hasn’t used the data. Until now. Blood oxygen can be used to detect sleep conditions such as sleep apnea, and offer a better analysis of what’s going on with…

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