Fitbit finally turns on SpO2 sensors and begins tracking blood oxygen levels

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After first debuting an SpO2 sensor in its first smartwatch back in 2017, Fitbit has finally begun to leverage it –and it’s starred tracking blood oxygen levels. In a quiet rollout – one Fitbit has officially confirmed – users on Reddit have noticed their Ionic, Versa series and Charge 3 trackers all providing blood oxygen…



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