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For assistance with Fitbit Ace LTE, visit support.google.com/fitbitacelte.

Why won't my Fitbit device sync?

If you can’t transfer data from your Fitbit device to your account, or if you stopped receiving notifications from your phone, your device might be disconnected. 

Note: If you see the phone disconnected icon  on Google Pixel Watch, Sense, or Versa 3, your Fitbit device can't communicate with your phone. Follow the troubleshooting steps below.

For more information, see How do Fitbit devices sync their data? and Fitbit-compatible devices.

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Fitbit devices

Each time you open the Fitbit app, your device syncs automatically when it's nearby. Or manually sync your device:

  1. With your device nearby, open the Fitbit app and tap Today .
  2. Press and hold on the screen and pull down.

If your device doesn't sync:

  1. Force quit the Fitbit app on your phone. For instructions, check the Apple help article or Android (Google) help article.
  2. On your phone, go to Settings  Bluetooth  and turn Bluetooth off and back on.
  3. Open the Fitbit app and try to sync your device.
  4. If your device doesn't sync, restart it. For instructions, go to How do I restart my Fitbit device?

If you still have trouble, follow the steps below depending on your phone.

iPhones

Requirements

  • Your iPhone is running the latest version of iOS. To check, tap Settings   General  Software Update.
  • Your Fitbit device is up-to-date. For more information, go to How do I update my Fitbit device?
  • The Fitbit app is up-to-date. For more information, go to How do I use the Fitbit app?
  • Your iPhone is connected to cellular data or Wi-Fi.
  • The Bluetooth setting on your iPhone is turned on. To check, tap Settings   Bluetooth .
  • Your Fitbit device is charged.

Troubleshooting steps

Reopen the Fitbit app after each step until your device syncs:

  1. Restart your phone. For instructions, check the Apple help article.
  2. Remove the Bluetooth connection between your iPhone and your Fitbit device:
    1. On your phone, go to Settings   Bluetooth  the information icon  next to the name of your Fitbit device  Forget This Device.
    2. Immediately, a message appears asking you to allow your device to display your iPhone notifications. Tap Allow.
    3. Open the Fitbit app and set up the connection again. A message appears asking you to allow your Fitbit device to pair with your phone.
    4. Tap Pair to approve the request.
  3. Remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your phone.
  4. If the Fitbit app is installed on more than one phone or tablet, uninstall the Fitbit app so that it's only installed on a single device.
  5. Place your Fitbit device near your phone or tablet and try again to sync.
Android phones

Requirements

Troubleshooting steps

Reopen the Fitbit app after each step until your device syncs.

  1. Confirm that permissions for the Fitbit app listed above are allowed on your phone.
  2. Restart your phone.
  3. Uninstall and reinstall the Fitbit app.  

Note: Before you uninstall the app, verify that your phone is running a supported version of Android OS. If your phone is on an older version, you won’t be able to reinstall the app. For OS requirements, go to Fitbit-compatible devices.

  1. Remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your phone.
  2. If the Fitbit app is installed on more than one phone or tablet, uninstall the Fitbit app so that it's only installed on a single device.
  3. Place your Fitbit device near your phone or tablet and try again to sync.
Google Pixel Watch series

If you can’t transfer data from your watch to your Fitbit account, see the information below. For other connectivity issues, see Fix Bluetooth, connection, and LTE issues on Google Pixel Watch.

Requirements

  • Your watch shows as “Connected” on the home screen in the Google Pixel Watch app .
  • Your watch is connected to Bluetooth, cellular data (LTE), or Wi-Fi. For more information, see Fix Bluetooth, connection, and LTE issues on Google Pixel Watch.
  • Your phone is connected to cellular data (LTE) or Wi-Fi.
  • The Bluetooth setting on your phone is turned on. To check, tap Settings  Bluetooth.
  • Your watch is connected to the Fitbit app on your phone. From the Today tab  in the Fitbit app , tap Devices . Google Pixel Watch should appear.
  • The Fitbit app on your watch is up-to-date. Press the crown, swipe up to the Play Store app , and tap the app to open it.Swipe up and tap Manage apps  Update all. To check for system updates, see Check for updates.
  • The Fitbit app on your phone is up-to-date. For more information, see How do I use the Fitbit app?
  • Your phone is running the latest version of Android OS. To check, tap Settings  About Phone or About Device  Android Version. To confirm your phone is running a supported version of Android OS, see Fitbit-compatible devices.
  • Your watch is charged.

Troubleshooting tips

  1. Force quit the Fitbit app on your phone. For instructions, see the Android (Google) help article.
  2.  On your phone, go to Settings  Bluetooth  and turn Bluetooth off and back on.
  3. Open the Fitbit app and try to sync your watch
  4. If your watch doesn't sync, restart it. From the clock screen, swipe up  Settings   System  Restart.

If you still have trouble, follow these steps. Reopen the Fitbit app after each step to see if your watch syncs.

  1. Restart your phone.
  2. Uninstall and reinstall the Fitbit app on your phone. Note: Before you uninstall the app, verify that your phone is running a supported version of Android OS. If your phone is on an older version, you won’t be able to reinstall the app. For OS requirements, see Fitbit-compatible devices.
  3. Remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your phone.
Scales

Aria Air

Requirements

  • You have the Fitbit app open and on the Today tab  on your nearby phone or tablet while you complete a weigh-in.
  • The latest version of the Fitbit app is installed on your phone or tablet.
  • The Bluetooth setting on your phone or tablet is on. To check, tap Settings  Bluetooth.
  • Your phone or tablet isn't managing other Bluetooth connections. If you have multiple Bluetooth products like speakers or headsets paired to your phone along with your Fitbit scale, you may have trouble using more than one at the same time. Turn off other Bluetooth connections when not in use.
  • If you use more than one device to sync, make sure the other device isn't nearby. If the device is nearby, turn off Bluetooth on it.
  • Your Fitbit scale's battery isn't critically low.

Troubleshooting steps

  1. Force quit and then reopen the Fitbit app.
  2. Go to Settings  Bluetooth and turn Bluetooth off and back on.
  3. Turn your phone or tablet off and back on.
  4. Uninstall and reinstall the Fitbit app.
  5. If your Fitbit scale won't sync after you reinstall the app, log in to your Fitbit account on a different phone or tablet and try to sync.
  6. If your Fitbit scale still doesn’t sync, remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your phone and try to sync.

Aria and Aria 2

After weighing in on Fitbit Aria or Fitbit Aria 2, the scale should display a progress bar, followed by a check mark, which indicates the new measurement synced successfully.

If the scale doesn't sync, you may see one of the following error messages on the scale’s screen:

  • NO SYNC
  • WIFI Symbol with an “X”
  • WRONG PASSWORD
  • CONNECTION ERROR
  • CAN'T CONNECT
  • NO WIFI
  • WEAK SIGNAL
  • No error message, but the measurement doesn't sync to your Fitbit account

If any of these conditions occur, try weighing yourself again. If the scale successfully syncs, it may have been a temporary issue that doesn't require further troubleshooting. If the problem persists, try the following tips:

  • Check that your router is on and working. If other devices are also unable to connect to your Wi-Fi network, restart your router.
  • Remove the batteries from your scale for 10 seconds, then reinsert them to restart your scale.
  • If you've made any changes to your network, such as a new router, network name, or password, see How do I use my Fitbit scale?
  • Your scale may be too far away from your router. Several walls, floors, or objects between the scale and router can cause interference. Try moving the scale closer to your router.
  • The network may have too much traffic or there are too many other Wi-Fi networks nearby. Don't use public Wi-Fi to sync your scale.

If you still can't sync, contact Customer Support. For additional information on error messages, see How do I use my Fitbit scale?

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