Fitbit Wearable Sync Failed Error: How to Fix It

Easy 10-20 minutes Low Severity Verified June 2026
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Error Code
Sync failed
Brand
Fitbit
Product Type
wearable
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
10-20 minutes
When your Fitbit shows a sync failed error, it means your device can't communicate with the Fitbit app on your phone, usually due to Bluetooth connectivity issues or app glitches. This is a common problem that can typically be resolved by restarting the sync process, clearing app data, or re-establishing the Bluetooth connection.
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Tools You'll Need

How to Fix Error Code Sync failed

  1. Force close and restart the Fitbit app

  2. Restart your Fitbit device

  3. Check Bluetooth connection

  4. Log out and back into the Fitbit app

    Make sure you remember your Fitbit login credentials before logging out

  5. Remove and re-add your Fitbit device

    This will remove your device from your account temporarily. Your historical data will remain safe in your Fitbit account

  6. Clear Fitbit app cache and data

    You'll need to log back into the app after clearing data or reinstalling

  7. Check for app and firmware updates

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When to Call a Professional

Contact Fitbit customer support if sync issues persist after trying all steps, if your device is under warranty, or if you notice physical damage to your Fitbit that may be causing connectivity problems.

Frequently Asked Questions

Why does my Fitbit keep saying sync failed?
Fitbit sync failed errors are usually caused by Bluetooth connectivity issues, outdated app versions, or temporary server glitches. The most common fix is logging out of the Fitbit app and logging back in to refresh the connection.
How do I force my Fitbit to sync?
To force sync your Fitbit, open the Fitbit app and pull down on the main dashboard screen. You can also try the 'Sync Now' option in the device settings within the app. If this doesn't work, restart both your Fitbit device and the app.
Will I lose my data if I remove my Fitbit device?
No, your historical fitness data is safely stored in your Fitbit account and won't be lost when you remove and re-add your device. Only the device pairing will be reset, not your activity history.
How often should my Fitbit sync automatically?
Fitbit devices automatically sync every 15-30 minutes when they're within range of your paired phone and both devices have adequate battery life. You can also manually sync anytime by opening the Fitbit app.
Can I sync my Fitbit without the app?
No, you need the Fitbit app on your smartphone to sync your device. However, you can also sync using a computer with the Fitbit Connect software, though this method has limited functionality compared to the mobile app.

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