How can Fitbit help me track my temperature?

Track your temperature over time to help identify patterns and spot trends.

For instructions on how to change the temperature units you see on your Fitbit device or in the Fitbit app, see How do I change the units of measurement in my Fitbit account?

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Body Temperature

What is body temperature?
Body temperature is the temperature inside your body, which is usually taken with a thermometer. It typically varies less than your skin temperature.
Body temperature is referred to as core temperature by some Fitbit features and devices.
How do I manually log my body temperature with the Fitbit app?
  1. Turn on the Body temperature tile  by tapping the pencil icon on the upper right of the Today tab. Tap the switch next to Body temperature and then Save.
  2. From the Today tab in the Fitbit app, tap the Body temperature tile . A graph of your body temperatures appears.
  3. Tap + Log temperature on the bottom right. 
    Some phone models may display + Add temperature on the bottom right instead. Tap + Add temperature and then Log manually.
  4. Fill in the date and time you took your temperature and your body temperature and then Save.
If you log a temperature when your phone isn’t connected to the internet, your phone will send the data to Fitbit servers when it reconnects to the internet. Rarely, the values may fail to save to Fitbit servers. If you notice data missing from the app, re-log it.
How do I use the Pixel phone Thermometer app with Fitbit?

The Thermometer app on Pixel 8 Pro has a Body Temperature Software (BTS) feature. With the BTS feature, you can use your smartphone to take body temperature measurements and then save them to the Fitbit app. Note that this feature is only currently available in the United States.

How do I set up the connection between the Pixel 8 Pro Thermometer app and the Fitbit app?

You can set up the connection starting either from the Fitbit app or from the Thermometer app.

Fitbit app

  1. From the Today tab in the Fitbit app, tap the Body temperature tile . If you don't see the Body temperature tile, add it by tapping the pencil icon on the upper right of the Today tab and turning on the switch next to Body temperature and then Save.
  2. Tap Get started on the Take your temperature card.You’ll see an introductory screen. Tap Continue.
    • If you signed in with a Fitbit account, you will first see a card inviting you to move Fitbit to your Google Account. Tap the card and follow the on-screen instructions. For more information see What should I know about moving Fitbit to my Google Account? You will then see the Take your temperature card.
  3. When you’re prompted to connect Thermometer to other apps, turn on the switch to allow Thermometer to share body temperature data with Fitbit and then Allow.
    • You can manage or turn off the connection in Settings and then Manage your data in the Thermometer app.
  4. After you set up the correct permissions and settings, take a temperature measurement by following the instructions in How do I take my temperature with my Pixel phone? After you take your temperature, tap Save on the bottom right. 
  5. You’ll see a screen explaining how results are saved to your Fitbit profile. Tap Save. The body temperature value saves to Fitbit and can be viewed on a body temperature graph.

Thermometer app

  1. Make sure the Fitbit app is installed on your phone and that you are logged into Fitbit using a Google account. 
  2. Open the Thermometer app on your Pixel phone and tap Body temperature.
  3. When you’re prompted to connect Thermometer to other apps, turn on the switch to allow Thermometer to share body temperature data with Fitbit and then Allow. Follow the on-screen instructions to set up the permissions and settings.
    • You can manage or turn off the connection in Settings and then Manage your data in the Thermometer app.
  4. Take a temperature measurement by following the instructions in How do I take my temperature with my Pixel phone? After you take your temperature, tap Save on the bottom right. 
  5. On the Recent results screen, tap Save to Fitbit next to the temperature value you want to share with Fitbit. 
  6. You will then be taken to the Fitbit app, and you’ll see a screen explaining how results are saved to your Fitbit profile. Tap Save. The body temperature value will save to Fitbit and can be viewed on a body temperature graph.

Troubleshooting

If your temperature isn’t saved to the Fitbit app or you see an error message, confirm:

  • You’re logged into the Fitbit app–If you’re not logged into the Fitbit app, you’ll be prompted to log in. After logging in, return to the Thermometer app and try again to share your temperature.
  • The Fitbit app is installed–If it’s not installed, you’ll be taken to the Play Store to download the Fitbit app. Download the app and log into your Fitbit account. Then return to the Thermometer app and try again to share your temperature.
  • You log in to the Fitbit app using a Google account–If you haven’t moved Fitbit to your Google Account, follow the instructions in What should I know about moving Fitbit to my Google Account? After moving your account, return to the Thermometer app and try again to share your temperature.
  • You’re not logged into a child account in Fitbit–Saving body temperatures for child profiles isn’t currently supported.
How do I use the Fitbit app to track temperatures measured with the Pixel 8 Pro Thermometer app?

Fitbit app

  1. From the Today tab in the Fitbit app, tap the Body temperature tile
  2. Tap + Add temperature on the bottom right and then Thermometer.
  3. Take a temperature measurement by following the instructions in How do I take my temperature with my Pixel phone?
  4. After you take your temperature, tap Save on the bottom right. The body temperature value will save to Fitbit and can be viewed on a body temperature graph.


Troubleshooting

Error message Solution
Couldn’t reach temperature sensor. Opening Fitbit.

When opening the Thermometer app from Fitbit, you might see an error message if the temperature sensor is currently unavailable. You will then be automatically returned to the Fitbit app. 


For more details, close the Fitbit app and open the Thermometer app. The main screen of the Thermometer app will display a short summary of the issue (e.g., the sensor may be too warm) along with recommendations for how to address it. For more details, see How do I take my temperature with my Pixel phone?

Thermometer app

You can also measure body temperature starting from the Pixel phone’s Thermometer app and save the data to the Fitbit app.

  1. Open the Thermometer app on your Pixel phone and tap Body temperature.
  2. Take a temperature measurement by following the instructions in How do I take my temperature with my Pixel phone? After you take your temperature, tap Save on the bottom right. 
  3. On the Recent results screen, tap Save to Fitbit next to the temperature value you want to share with Fitbit. You will then be taken to the Fitbit app, where the temperature value can be viewed on a body temperature graph.
    • Data is not automatically shared with the Fitbit app. Tapping Save to Fitbit next to a temperature value only shares that value.

Notes

  • You can view Thermometer app values saved to Fitbit on any Android device. Viewing data saved from the Thermometer app isn’t supported yet in the Fitbit app for iOS. You can export your data to see Thermometer data you saved to Fitbit. For details see How do I export my Fitbit data?
  • In the Fitbit app, timestamps are handled differently for manually logged temperatures versus temperatures saved from the Thermometer app. For manual logs, timestamps are always displayed in the local time at time of logging. They don’t update when timezones change. For temperatures saved from the Thermometer app, timestamps are displayed in current local time based upon the phone’s system settings. 
  • If you log a temperature when your phone isn’t connected to the internet, your phone will send the data to Fitbit servers when it reconnects to the internet. Rarely, the values may fail to save to Fitbit servers. If this happens, you can re-export the value from the Thermometer app to Fitbit within 7 days of the time of measurement.
How do I delete body temperatures from the Fitbit app?
  1. From the Today tab in the Fitbit app, tap the Body temperature tile . A graph of your body temperatures appears with a list of your temperature history below. 
  2. Tap an individual temperature value.
  3. Tap the deletion icon in the upper right and then Yes when asked to confirm if you want to delete this value. The value will then be removed from the list of temperatures.

Deleting a body temperature value from the Fitbit app will not delete it from your phone’s Thermometer app. Similarly, deleting a value from your phone’s Thermometer app will not delete it from Fitbit.

Notes 

  • You can only delete values when you are connected to the internet. 
  • The Manage your Fitbit Data page in your web browser does not yet support deletion of values saved to Fitbit from the Thermometer app. Please follow the instructions to delete these values from the Fitbit app.
  • Deleting your Fitbit account will delete values saved to Fitbit from the Thermometer app. For information on deleting your Fitbit account, see How do I delete my Fitbit account and service?
How do I see my body temperature trends and values?
  1. From the Today tab in the Fitbit app, tap the Body temperature tile .  If you don't see the Body temperature tile, add it by selecting the pencil icon on the upper right of the Today tab and turn on the switch next to Body temperature and then Save. A graph of your body temperatures appears with a list of your temperature history below. 
  2. Tap an individual temperature in the list to see details about that value.

Skin Temperature

What is skin temperature?
Skin temperature is the temperature on the skin's surface. It typically varies more than your body temperature, since warming up or cooling down the skin is one way the body regulates itself and keeps body temperature stable. Some Fitbit devices use a sensor to estimate your personal baseline skin temperature, based on up to 30 days of data. Each morning, you can see how your skin temperature from your last sleep period compares to your personal baseline. Note that you see this information as your skin temperature variation (whether your skin temperature was higher or lower than your personal baseline).
Which Fitbit devices log skin temperature variation?

Fitbit Sense and Fitbit Sense 2 use a dedicated sensor to estimate your skin temperature variation during sleep sessions. Fitbit Charge 4, Fitbit Charge 5, Fitbit Charge 6, Google Pixel Watch 2, Fitbit Inspire 2, Fitbit Inspire 3, Fitbit Luxe, and Fitbit Versa series surface your sleep-measured skin temperature variation through existing sensors.

How does Fitbit calculate my baseline temperature?

Everyone has a different temperature baseline. When you wear a compatible Fitbit device to sleep, it checks your skin temperature every minute. When the Fitbit app has tracked your sleep skin temperature data for at least 3 days, it estimates your personal baseline temperature. As you continue to wear your Fitbit device to sleep, the Fitbit app uses up to 30 days of data to adjust your baseline temperature.

How do I see my skin temperature trends?
Sense and Sense 2
  1. Wear your device for at least 3 days, including to sleep.
  2. Upon waking, open the Fitbit app and tap the Skin Temp Variation tile .
    You will see a history of your sleeping skin temperature variations, along with any core temperature readings you manually recorded.
  3. Tap the tile to see a history of your sleeping skin temperature variations, along with any core temperature readings you manually recorded.
  4. Tap a log to see a minute-by-minute record of your skin temperature variation throughout the most recent sleep session.

You may notice more variation when you look at your minute-by-minute data, as compared with your overall skin temperature variation for a sleep session. Your skin temperature changes throughout your sleep period as you move around and your body regulates itself. Your overall variation is based on your average skin temperature during a sleep session

Charge 4, Charge 5, Charge 6, Inspire 2, Inspire 3, Luxe, Versa series, and Google Pixel Watch 2
  1. Wear your device for at least 3 nights, including to sleep.
  2. In the morning, open the Fitbit app and tap the Health Metrics tile .
  3. Tap the Skin temperature tile  to see more details, including your historical data.
How do I check my skin temperature on the Google Pixel Watch 2?
  1. Wear your device for at least 3 days, including to sleep.
  2. Upon waking, open the Fitbit app and tap the Skin Temp Variation tile .
  3. Tap Open to see more details.
Why does my skin temperature vary?

Skin temperature typically varies over the course of a sleep session. Factors that may cause skin temperature to vary include changes in room temperature, bedding, circadian rhythm, menstrual cycle, or the onset of an illness. Note that significant changes in ambient temperature may negatively impact skin temperature tracking.

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