Why won't my Fitbit device sync?

​If you notice any of the following issues, your Fitbit device might be disconnected from your phone:

• The Fitbit app doesn’t show updated stats, even when you try to manually sync your device.
• You encounter an error in the Fitbit app when your device tries to sync.
• You stop receiving notifications on your Fitbit device from your phone.
• The time on your Fitbit device is incorrect.
  • If your Fitbit’s time is off by a few minutes, start with Step 4. If the issue persists, begin again with Step 1.
  • If your device's time is off by an hour or more, refer to How do I change the time on my Fitbit device?
• Your Fitbit device may display a Phone disconnected icon .

Follow the troubleshooting steps below.

Important: Fitbit device must remain near your phone to sync.

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Fitbit devices

Troubleshoot Syncing on Fitbit with Android

Step 1: Uninstall the Fitbit app on any other phones or tablets nearby

1. Your Fitbit device can only sync with one device at a time. If you have any other phones or tablets nearby that are signed into the same account, uninstall the Fitbit app on those devices. For instructions, refer to the Android help article or Apple help article.
2. Check that your Fitbit device isn’t paired to any other phones or tablets nearby. Open the Settings app on your other phone or tablet. Tap Connected devices or Bluetooth and make sure your Fitbit device isn’t listed. If it is, remove it:
   • Android: Tap the Gear icon Forget.
   • iPhones: Tap the Information icon Forget This Device.
3. Open the Fitbit app on the phone that has the Fitbit app installed and try to sync your Fitbit device. If it still doesn’t sync, continue to the next step.

Step 2: Restart your Fitbit device

1. Restart your Fitbit device. For instructions, refer to How do I restart my Fitbit device?
2. When your device has finished restarting and displays the clock face, try to sync from the Fitbit app. If it doesn’t sync, continue to the next step.

Step 3: Try to manually sync your Fitbit device

1. With your Fitbit device nearby, open the Fitbit app and select the Today tab .
2. Tap and hold on the screen, then pull down until a progress bar appears at the top.
3. Release your finger and wait for the progress bar to fill. If it doesn’t sync, continue to the next step.

Step 4: Check your phone’s Bluetooth and internet access

1. Reset Bluetooth by turning it off. Wait at least 3 seconds and then turn Bluetooth back on.
   • To do this:
   • Android: Open the Settings app and then tap Connected devices Connection preferences Bluetooth.
   • iPhone: Open the Settings app and then tap Bluetooth.
2. Check that your phone is connected to cellular data or Wi-Fi. The Fitbit app must be connected to the internet to sync.
3. Once your phone’s access to Bluetooth and the internet is confirmed, continue to the next step.

Step 5: Restart your phone

1. Restart your phone. For instructions, refer to the Android help article or Apple help article.
2. After your phone restarts, open the Fitbit app and try to sync your Fitbit device. If it doesn’t sync, continue to the next step.

Step 6: Update your phone, Fitbit app, and Fitbit device

1. Check for any pending updates on your phone. For instructions, refer to the Android help article or Apple help article. To confirm your phone is running a supported version, check Fitbit-compatible devices.
2. Check the Fitbit app for pending updates. For instructions, refer to How do I use the Fitbit app?
3. Check for any pending updates for your Fitbit device. For instructions, refer to How do I update my Fitbit device?
4. Once everything is fully up-to-date, continue to the next step.

Step 7: Check your phone permissions

1. On your phone, open the Settings app.
2. Tap Apps Fitbit.
   • Android: Tap Permissions and make sure the following permissions are turned on:
     • Location (For more information, go to Why is the Fitbit app prompting me to turn on location services?)
     • Nearby devices (Android 12.0+)
   • iPhones: Make sure the following permissions are turned on, at a minimum:
     • Bluetooth
     • Background App Refresh
     • Cellular Data
3. Once your phone has all the necessary permissions turned on, continue to the next step.

Step 8: Charge your Fitbit device

1. Connect your Fitbit device to its charger. For instructions, refer to How do I charge my Fitbit device?
2. When your device begins to charge, continue to the next step.

Step 9: Pair your Fitbit device again (iPhone only)

If you use an Android phone, skip to Step 10.

1. On your phone, open the Settings app and then tap Bluetooth .
2. Tap the Information icon next to the name of your Fitbit device Forget This Device.
3. If a message appears asking you to allow your device to display your iPhone notifications, select Allow.
4. Open the Fitbit app and wait. When a message appears asking you to allow your Fitbit device to pair with your phone, tap Pair to approve the request.
5. Try to sync your Fitbit device. If it doesn’t sync, continue to Step 11.

Step 10: Uninstall and reinstall the Fitbit app (Android only)

If you use an iPhone, skip to Step 11.

1. Before you uninstall the Fitbit 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, refer to Fitbit-compatible devices.
2. Uninstall the Fitbit app. For instructions, refer to Delete apps on your Android device.
3. Reinstall the Fitbit app. For instructions, refer to Reinstall & re-enable apps.
4. Try to sync your Fitbit device. If it doesn’t sync, continue to the next step.

Step 11: Remove other Fitbit devices from your account and phone

1. Open the Fitbit app on your phone.
2. From the Today tab , tap Devices .
3. If other Fitbit trackers or watches are listed, tap the option to remove the device.
   • On Android phones, tap the Delete .
4. Follow the on-screen instructions to remove the device from your account.
5. Open the Settings app on your phone. Tap Connected devices or Bluetooth and make sure no other Fitbit trackers or watches are listed. If any are listed, remove them.
   • Android: Tap the Gear icon Forget.
   • iPhones: Tap the information icon Forget This Device.
6. Reopen the Fitbit app and try to sync your Fitbit device. If it still doesn’t sync, contact Customer Support.

Google Pixel Watch series

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

Important: Battery saver mode and Bedtime mode limit background data connectivity. Fitbit data may not sync if any of these modes are turned on, and data will only sync once they’re turned off. To restore background data connectivity, simply interact with your Pixel Watch, or turn off Bedtime mode or Battery saver mode.

Troubleshoot Syncing on Fitbit with Google Pixel Watch

Step 1: Check your settings

1. Make sure that:
   • Your watch shows as "Connected" on the home screen in the Google Pixel Watch app .
   • From the Today tab in the Fitbit app, your name appears in the greetings section. For more information, refer to How do I set up my Fitbit device?
   • Your watch is connected to Bluetooth, cellular data (LTE), or Wi-Fi. For more information, refer to 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, open the Settings app on your phone. Tap Connected devices Connection preferences 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 in the list of devices connected to Fitbit.
   • The Fitbit app on your watch is up-to-date.
     1. Press the crown, swipe up to the Play Store app , and tap the app to open it.
     2. Swipe up and near the very bottom, tap Manage apps Update all.
     3. To check for system updates, refer to Check for updates.
   • The Fitbit app on your phone is up-to-date. For more information, refer to How do I use the Fitbit app?
   • Your phone is running the latest Android OS. To check, open the Settings app on your phone About Phone or About Device Android Version. To confirm that your phone is running a supported version of Android OS, refer to Fitbit-compatible devices.
   • Your watch is charged.
2. If you checked all your settings and your watch still doesn’t sync with the Fitbit app, continue to the next step.

Step 2: Restart your phone

1. Restart your phone. For instructions, refer to the Android help article or Apple help article.
2. After your phone restarts, open the Fitbit app and try to sync your Fitbit device. If it doesn’t sync, continue to the next step.

Step 3: Reinstall the Fitbit app, and clear your settings

Reopen the Fitbit app after each step to check if your watch syncs.

1. Uninstall and reinstall the Fitbit app on your phone.
   Important: 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, refer to Fitbit-compatible devices.
2. Remove all other Fitbit devices from your Fitbit account and from the list of connected Bluetooth devices on your phone.
3. If your watch still doesn’t sync, contact Customer Support.

Scales

Aria Air

Requirements

• You must have the Fitbit app open on your nearby phone or tablet while you complete a weigh-in. Make sure the Fitbit app is open to the Today tab .
• 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:
  • Android: Open the Settings app. Tap Connected devices Connection preferences Bluetooth.
  • iPhones: Tap the Settings app Bluetooth.
• Your phone or tablet isn't managing other Bluetooth connections. Having multiple Bluetooth devices paired to your phone may cause connectivity issues with your Fitbit scale. Turn off other Bluetooth devices when not in use.
• If you use more than one phone or tablet to sync your scale, 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. The battery level appears on your scale’s display.

Troubleshooting steps

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

Aria and Aria 2

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

If the scale doesn't sync, you might notice 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 happen, weigh 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, refer to How do I use my Fitbit scale?
• Your scale may be too far 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 too many nearby Wi-Fi networks. 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, refer to How do I use my Fitbit scale?