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Why won't my tracker sync?

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If you created a Fitbit account and followed the set up instructions, the data your tracker collects should sync when you open the Fitbit app or when you initiate the Sync Now command. To learn more about how syncing works on mobile devices and computers, see How do Fitbit trackers sync their data?

If your tracker doesn't sync when prompted, choose your platform below for guidance. If you're having trouble with the Charge HR specifically, first make sure its firmware is up to date as described in Why can't I update my tracker?

  • Apple iOS devices

    Syncing difficulty is usually caused by a missing requirement. Verify each one before moving on to the troubleshooting steps.

    Requirements

    Troubleshooting

    If your tracker still won't sync, try these steps:

    1. Force quit the Fitbit app. For instructions see the Apple help article.
    2. Go to Settings > Bluetooth and turn Bluetooth off and back on.
    3. Open the Fitbit app.
    4. If your tracker didn't sync, reboot your mobile device. For instructions see the Apple help article.
    5. Open the Fitbit app.
    6. If your tracker didn't sync, restart it using the instructions in How do I restart my tracker?
    If your tracker won't sync after the restart, try logging in to your Fitbit account on a different mobile device or computer to help determine whether the original device is the culprit. 
  • Android devices

    Syncing difficulty is usually caused by a missing requirement. Verify each one before moving on to the troubleshooting steps.

    Requirements

    Tips

    Depending your Android device, these tips might make syncing easier:
    • The Always Connected option in the Fitbit app is on. This improves the Bluetooth connection between your phone and tracker. Note that turning on this feature may cause the battery on your tracker to drain more quickly than normal.
    • You've tried turning on All-Day Sync in the Fitbit app. This setting prompts your tracker to periodically sync with the Fitbit app but may shorten battery life on your mobile device or tracker.

    Troubleshooting

    If your tracker still won't sync, try these steps:

    1. Force quit and then reopen the Fitbit app.
    2. If the tracker doesn't sync, quit the app again and try turning Bluetooth off and on.
    3. Reopen the app once more. If the tracker doesn't sync, try again after rebooting your mobile device.
    4. If your tracker doesn't sync, try again after restarting your tracker. For instructions see How do I restart my tracker?
    5. Lastly, try uninstalling and reinstalling the Fitbit app.
    If your tracker won't sync after you reinstall the app, we recommend logging in to your Fitbit account on a different mobile device or computer to help determine whether the original device is the culprit. 
  • Windows 10 mobile devices

    Make sure these requirements are met:

    • The Fitbit app is installed on a supported mobile device. To verify that your device is supported, visit http://www.fitbit.com/devices.
    • The Bluetooth setting on your mobile device on. To check, go to Settings > Devices > Bluetooth.
    • The software on your mobile device is up to date. To check, go to Settings > System > Phone update.
    • If you use more than one Bluetooth phone, tablet, or computer to sync, the other one isn't nearby or its Bluetooth setting is turned off.
    • Your tracker's battery isn't critically low.
    • The firmware on your tracker is up to date as described in How do I update my tracker?

    If syncing difficulty persists, please contact Customer Support.

  • Windows 10 computers

    Syncing difficulty is usually caused by a missing requirement. Verify each one before moving on to the troubleshooting steps.

    Requirements

    • The Fitbit app for Windows 10 is installed.
    • The Bluetooth setting is on. To verify, go to Start > Settings > Bluetooth.
    • If your computer doesn't support Bluetooth, the wireless sync dongle is plugged in as shown. For more information see What is the wireless sync dongle and how do I use it?
      User-added image
    • Fitbit Connect software is not installed. This software helps computers that can't run the Fitbit app for Windows 10 communicate with a tracker. If you've had a tracker for a while and recently upgraded to Windows 10 you might still have the software installed. Look for an icon with the Fitbit logo located near the date and time on your computer ( User-added image ). If you find it, Fitbit Connect is installed and you need to uninstall it.

    Troubleshooting

    If your tracker still won't sync, try these steps:

    1. From the Start menu go to Settings > Bluetooth. Make sure you see your tracker on the list of devices with the word “Connected” below.
    2. If your tracker isn't connected:
      1. Tap or click the tracker name and choose Remove Device.
      2. Make sure your tracker is nearby and wait for it to reappear in the devices list.
      3. When it does, tap or click the tracker again and choose Pair. The pairing process can take several minutes but when its done the Bluetooth status should change to “Connected.”
    3. If your tracker is connected but won't sync, its possible your computer's Bluetooth signal is weak or temporarily compromised. Try plugging in the wireless sync dongle (most trackers) or charging cable (Blaze) to sync your tracker with the app.
    4. If you're still unable to sync or your tracker model didn't come with a wireless sync dongle, contact Customer Support so we can investigate the issue and get you back on track.
  • Windows 8.1 mobile devices

    Syncing difficulty is often caused by a missing requirement. Verify each one before moving on to the troubleshooting steps.

    Requirements

    • The app is compatible with your particular tracker. To check, see Is the Fitbit app for Windows 8.1 still supported?
    • The Fitbit app is installed on a supported device. For the latest list of supported devices, visit http://www.fitbit.com/devices.
    • The software on your mobile device is up to date. To check, go to Settings > Update & Security > phone update.
    • The Bluetooth setting on your mobile device is on. To check, go to Settings > system > Bluetooth.
    • Your tracker's battery isn't critically low.

    Troubleshooting

    If your tracker still won't sync, try these steps:

    1. Close the app and turn Bluetooth off and on.
    2. If your tracker doesn't sync when you reopen the app, reboot your mobile device.
    3. If your tracker doesn't sync after the reboot, restart your tracker as described in How do I restart my tracker?
    4. If restarting doesn't solve the problem, try uninstalling and reinstalling the Fitbit app.
    5. If your tracker won't sync after you reinstall the app, try logging in to your Fitbit account on a computer to help determine whether the original device is the culprit.
    6. If you still can't sync, contact Customer Support so we can investigate the issue and get you back on track.
  • Mac or Windows 8.1 computers

    Syncing difficulty is usually caused by a missing requirement. Verify each one before moving on to the troubleshooting steps.

    Requirements

    • Fitbit Connect is installed. To check, make sure you see an icon with the Fitbit logo located near the date and time on your computer (User-added image). If you can't find it, try the set up instructions again in How do I set up my tracker?
    • During set up your tracker connected ("paired") to your Fitbit account successfully. To check, log into your fitbit.com account and click the gear icon in the top right corner. You should see your tracker's name at the top of the menu. If you don't, click the Fitbit Connect icon. Choose Open Main Menu > Set Up a New Device and follow the instructions to pair your tracker.
    • If you're using a Mac and want to sync over Bluetooth, make sure Bluetooth is turned on. To check, go to System Preferences > Bluetooth > Turn Bluetooth On. Only Macs can sync with Fitbit Connect over Bluetooth.
    • If you're using a PC or Mac without Bluetooth, make sure your wireless sync dongle is plugged in and recognized by the computer. If you click the Fitbit Connect icon and see "Couldn't Find Wireless Sync Dongle," try a different USB port. Make sure you're using an actual port on your computer and not an accessory or USB hub. If your tracker didn't come with a wireless sync dongle, contact Customer Support.
      User-added image
    • If you also sync with a mobile device, make sure it isn't nearby or its Bluetooth setting is turned off.

    Troubleshooting

    If your tracker still won't sync, try the steps below. Note that your fitbit.com dashboard always shows the time of your last successful sync. Just click the gear icon in the top right.

    1. Prompt Fitbit Connect to sync with your tracker:
      1. Click the Fitbit Connect icon and click Open Main Menu.
      2. With your charged tracker nearby, click Sync Now.
      3. You may be asked to sign in to your Fitbit account, after which your tracker should sync. If you see a message saying your tracker can't be found, wake it up by pressing its button (most trackers) or tapping it (Flex and Zip).
    2. (Mac only) If your computer has Bluetooth:
      1. Turn Bluetooth off and back on under System Preferences > Bluetooth. If syncing still doesn't work, your Bluetooth signal may be weak or temporarily compromised.
      2. Try using the wireless sync dongle.
    3. Restart your tracker using the instructions in How do I restart my tracker?
    4. If your tracker won't sync after the restart, next try uninstalling and reinstalling Fitbit Connect. For instructions see How do I reinstall Fitbit Connect?
    If you can't sync to a compatible mobile device instead or your tracker didn't come with a wireless sync dongle, contact Customer Support.
     
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Last updated: August 26, 2016
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