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  • Writer's picturePulse Oximeter World

Helpful guide to Fitbit's oxygen sensor.




Fitbit oximeter? Your Fitbit now monitors your blood oxygen saturation levels while you sleep. The data is general in nature and measures the variations in blood oxygen levels throughout the night. It does not give hourly measurements with specific SpO2 numbers.


Currently the Fitbit Iconic, Versa, Versa 2, Versa 3, Sense, Charge 3 and Charge 4 all have the SpO2 functionality. It order to utilize the Fitbit oximeter function your Fitbit tracker's software needs to be up to date. Lets make sure your tracker is up to date.

  • Open your Fitbit mobile app

  • Tap your avatar in the upper left corner of the screen

  • Select the device you want to update

  • If there is no update available then most likely yours is up to date.



Now that your tracker is updated, you're good to go. Just wear your tracker when you go to sleep and it will monitor your blood oxygen saturation levels. But how do get this information? Follow these steps:

  • Open your Fitbit mobile app

  • Scroll down to the sleep icon (crescent moon) and tap

  • On the sleep screen, tap your sleep score

  • On the sleep score screen, scroll to "Estimated Oxygen Variation"

Fitbit Estimated Oxygen Variation

Understanding the graph is pretty straight forward. Fitbit has kept the blood saturation monitoring generalized as they do not intend on the tracker being used as a medical device. The graph measures the variations in blood oxygen saturation levels. You only need to be concern if your SpO2 readings spike consistently above the large variation line. This could indicate underlying health issues such as sleep apnea and snoring. That being said, you should monitor your sleep for a few weeks to understand how your body sleeps and if you think you might have a medical issue, then consult with your doctor with your concerns.


Order your Fitbit Iconic on Amazon here.

Order your Fitbit Versa2 on Amazon here.

Order you Charge4 on Amazon here.

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