Fitbit has recently rolled out a new feature that allows users to track their blood oxygen saturation levels, also known as SpO2. This feature is intended for general wellness purposes and can be helpful in monitoring how well oxygen is distributed throughout the body during sleep. The data provided by Fitbit SpO2 is a close estimation of blood oxygen saturation levels, but it may not be entirely accurate and should not be used for medical purposes. Fitbit Premium members can view their SpO2 trends over time in the Health Metrics dashboard. Fitbit devices with the SpO2 feature include the Charge 4, Charge 5, Charge 6, Inspire 3, Luxe, Sense series, Versa 3, and Versa 4.
| Characteristics | Values |
|---|---|
| Name of the feature | Estimated Oxygen Variation |
| Purpose | To track how well oxygen is distributed through your body |
| How it works | Uses red and infrared sensors on the back of the device |
| Where to find the data | From the Today tab in the Fitbit app, tap the Sleep duration tile then tap Estimated Oxygen Variation |
| Fitbit models with the feature | Fitbit Ionic, Versa family, Fitbit Sense, Inspire 3, Charge 4, Charge 5, Charge 6, Luxe, Versa 3, and Versa 4 |
| Intended use | For general wellness purposes only and should not be used or relied on for any medical purposes |
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What You'll Learn

Fitbit's SpO2 feature
The SpO2 feature on Fitbit devices is intended for general wellness purposes only and should not be used for medical reasons. SpO2, or blood oxygen saturation, is the percentage of your blood that is saturated with or contains oxygen. This level tends to remain constant, even during exercise and sleep. Monitoring your oxygen levels can be helpful during exercise and sleep, as it could help with the early detection of underlying health issues. Fitbit has made blood oxygen monitoring available under the sleep portion of its app, and data is presented at a generalised level.
To track your SpO2, you must sync your Fitbit device with the Fitbit app. It may take around an hour for your SpO2 values to appear after you sync your device. You should wear your Fitbit slightly higher on your wrist, with the device in contact with your skin. Your device should be snug but not constricting. Tattooed skin can impact the accuracy of the red and infrared sensors on your device.
To view your SpO2 data, open the mobile app and look at your daily summary. Sleep should be one of the categories of data tracked. If you scroll down past the hours tracked and sleep stages, you should see a section called 'Estimated Oxygen Variation'. You can also see your SpO2 trends in the Health Metrics tile in the Fitbit app on your phone. The Health Metrics dashboard is available to Fitbit Premium members.
The SpO2 feature is available on the following devices:
- Fitbit Ionic
- Versa family
- Fitbit Sense
- Charge 4
- Charge 5
- Charge 6
- Inspire 3
- Luxe
- Sense series
- Versa 3
- Versa 4
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Fitbit Premium members can access Health Metrics dashboard
Fitbit Premium members can access the Health Metrics dashboard, which provides a comprehensive view of their health and wellness data. The dashboard offers insights into various metrics, including heart rate variability, breathing rate, skin temperature variation, and oxygen saturation (SpO2).
The Health Metrics dashboard was initially a Premium feature, but Fitbit later made it free for all users. However, Premium members still have access to additional benefits. They can track their 7-day and 30-day trends, as well as historical data for up to 90 days. This long-term data allows Premium members to identify patterns and make more informed decisions about their health.
The SpO2 feature, which tracks blood oxygen saturation, is particularly noteworthy. It provides insights into how well oxygen is distributed throughout the body, which can be helpful during both exercise and sleep. For example, monitoring oxygen levels during sleep can aid in the early detection of potential health issues. Fitbit users can access their SpO2 data through the Health Metrics dashboard, viewing their SpO2 trends and 7-day graphs.
It's important to note that the SpO2 data provided by Fitbit is intended for general wellness purposes only and should not be used for medical diagnosis or treatment. Nonetheless, this feature empowers users to take a more proactive approach to their health and well-being.
By leveraging the Health Metrics dashboard, Fitbit Premium members can gain valuable insights into their health trends, enabling them to make informed decisions and take proactive steps toward achieving their wellness goals.
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Fitbit's Estimated Oxygen Variation
Fitbit has introduced a new feature that allows users to track their blood oxygen saturation levels, also known as SpO2. This feature is intended for general wellness purposes and can be helpful during both exercise and sleep. Monitoring oxygen levels during sleep can help with the early detection of underlying health issues.
To track your blood oxygen saturation levels with a Fitbit device, make sure your device is paired and located close to your phone. It is recommended to leave your Fitbit on its charging dock as updates can take some time, depending on your previous update and internet connection speed. After updating, simply wear your Fitbit to sleep. Your Fitbit device uses red and infrared sensors on the back to estimate your blood oxygen saturation levels while you sleep.
The data provided by Fitbit SpO2 is an estimation of your blood oxygen saturation levels and may not be entirely accurate. Typically, your blood oxygen saturation level is between 95-100%, indicating that your blood is carrying as much oxygen as it can. Nighttime SpO2 levels are usually lower than daytime SpO2 levels due to a decrease in breathing rate during sleep. Small variations in your estimated oxygen saturation levels are normal, and you can view your SpO2 trends over time in the Health Metrics dashboard.
To view your Fitbit's Estimated Oxygen Variation (EOV), open the mobile app and go to the "Today" tab. Then, tap the "Sleep Duration" tile and select "Estimated Oxygen Variation." The EOV graph will show an estimate of the changes in your blood oxygen saturation levels throughout the night. It's important to note that the Fitbit device is not intended for medical purposes, and you should consult a healthcare professional for any health-related questions or issues.
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Fitbit devices with SpO2 sensors
To track your SpO2 levels with a Fitbit device, you need to have a device with an SpO2 sensor. According to Wareable.com, every Fitbit tracker is now fitted with an SpO2 sensor, so any current device should be able to track this metric. The Fitbit Inspire 3, Charge 4, Charge 5, Charge 6, Luxe, Sense series, Versa 3, and Versa 4 are all mentioned as devices that can track SpO2.
To view your SpO2 data, you can open the Fitbit mobile app and look at your daily summary. Sleep should be one of the categories of tracked data. If you scroll down past the hours tracked and sleep stages, you will see a section called "Estimated Oxygen Variation." This will show your SpO2 trends over time. You can also view your SpO2 range and a 7-day graph in the app or on your watch. On the Sense and Versa 3, you can tap the Oxygen Saturation tile to access this information.
To ensure you're getting the most accurate data, it's important to keep your Fitbit device updated and charged, and to wear it for a full day, including while you sleep. By following these steps, you can take advantage of the SpO2 tracking capabilities of your Fitbit device to monitor your blood oxygen saturation levels and gain insights into your overall health and wellness.
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How to view oxygen levels in the Fitbit app
To view your oxygen levels in the Fitbit app, you must first ensure that your Fitbit device is paired with your phone and has enough battery to run an update. Ideally, you should leave your Fitbit on its charging dock. After updating, you can enable blood oxygen monitoring by simply wearing your Fitbit to sleep.
The data should be available to you under the Sleep section of your Fitbit app. To view it, open the mobile app and look at your daily summary. Sleep should be one of the categories of data tracked while you’re wearing the Fitbit. If you scroll down past the hours tracked and sleep stages, you should see a section called Estimated Oxygen Variation. You can also see your SpO2 trends in the Health Metrics tile in the Fitbit app on your phone.
If you have a Sense or Versa 3, you can tap the Oxygen Saturation tile to see your SpO2 range and a 7-day graph. It may take around an hour for your SpO2 values to appear after you wake up. The tile shows data for your most recent sleep session. If your sleep session is split into two separate logs or you take a long nap, the tile updates to show data for the most recent sleep session after your device syncs with the Fitbit app.
For Versa, Versa Lite Edition, and Versa 2, SpO2 data is only collected when you use an SpO2 clock face. For Inspire 3, Sense series, Versa 3, and Versa 4, you can install either an SpO2 clock face or the SpO2 app to collect SpO2 data. Charge 4, Charge 5, Charge 6, and Luxe users must have the SpO2 app installed. SpO2 data is tracked automatically on Google Pixel Watch series; you don’t need to install a clock face or app.
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Frequently asked questions
Your Fitbit device is equipped with an SpO2 sensor, which is a red LED in the optical heart rate monitor. This sensor tracks your blood oxygen saturation as a percentage, which you can see in your Health Metrics dashboard. To view it, open the Fitbit app and go to the 'Today' tab. Then, tap the 'Sleep duration' tile and tap 'Estimated Oxygen Variation'.
All current Fitbit trackers can track oxygen levels during sleep. This includes the Ionic, Versa family, Sense, and Inspire 3.
Your Fitbit tracker will show a metric that correlates with the average variability of your blood oxygen level. For example, if one person has an oxygen level of 96% +/-1% and another person has an oxygen level of 95% +/- 4%, the second person will see a higher "estimated oxygen variation" throughout the night.
No, the data provided by Fitbit SpO2 is intended to be a close estimation of your blood oxygen saturation levels, but it may not be precisely accurate. You should not use or rely on it for any medical purposes. If you have any health issues, consult your healthcare professional.









































