Why can't I update my Fitbit device?

Occasionally a firmware update will start and stop or otherwise fail.

Before you update, ensure that:

• Your Fitbit device runs the latest firmware. For more information, go to How to Update Your Fitbit Device, Google Pixel Watch, and Scale Firmware.
• The device is charged to at least 50%. A charge of 75% or higher is recommended to prevent power loss.
• The Fitbit app on your phone or tablet is the latest version available in your app store.
• You have a stable Wi-Fi or cellular connection.

Tip:

• Keep the app running: Updates can take up to an hour. Keep the Fitbit application running in the background while the device syncs.
• Step count accuracy: If you update your Fitbit device right as the day changes (at midnight), your step count might be wrong for a day.

Reconnect device to host phone or tablet

If the device fails to sync or an update doesn’t begin, try to:

• Force quit the Fitbit app on the host phone or tablet.
• Go to the phone's Settings and turn Bluetooth off. Wait a minimum of 10 seconds, and then turn it back on. This resets the phone's Bluetooth radio stack.
• Restart the Fitbit device using the standard, device-specific procedure. For instructions, go to How do I restart my Fitbit device?
• Perform a full restart of the host mobile phone or tablet.
• Ensure the Fitbit device remains physically close to the host phone (within 2 to 3 feet).
• Temporarily disable Bluetooth on all other nearby devices, including secondary mobile phones. Also disable smart home hubs, or other wearable devices. Multiple paired devices can cause connectivity issues with the Fitbit device.

Advanced Troubleshooting

Perform a full Bluetooth disconnection and re-setup

This process removes your old connection profile to ensure a fresh start when you pair again.

• Remove device from the app: Navigate to your device settings within the Fitbit app then select the option to remove the device from your account. For instructions, refer to How do I set up my Fitbit device?
• Forget device from phone: Go to the phone's native system settings such as Connected devices or Bluetooth. Locate your Fitbit device in the previously paired devices list.

  Important: Failure to do this leaves residual, corrupted data that prevents successful re-pairing.

  • For iPhone and iPad: Tap Forget This Device.
  • For Android: Tap Unpair or Forget.
• Reset-up device: Force quit the Fitbit app, then reopen it and follow the on-screen instructions to set the device up again. For instructions, refer to How do I set up my Fitbit device?

Clear platform-specific application cache

Managing the local data cache of the Fitbit app on the mobile device frequently solves connectivity issues. This is crucial for fixing persistent sync problems such as delayed sleep data display.

Android deep cache clearing

1. Go to Settings Apps.
2. Tap Fitbit Storage Clear Cache.

iOS cache workaround

• iOS architecture typically doesn’t permit manual cache clearing. The functional equivalent for iPhone or iPad users is the full Uninstall and Reinstall of the Fitbit app, which should only be attempted after the device has been fully "forgotten" from the OS Bluetooth settings.

Perform device recovery (hardware reset)

Important:

• These troubleshooting steps are only recommended as a last resort for unresponsive devices, devices stuck in boot loops, or persistent update failures that have "bricked" the device.
• A factory reset erases all data stored locally on the device. This includes unsynced activity statistics, alarms, goals, and notification settings. The device returns to a factory state and you must set it up again.

Follow the factory reset instructions in How do I restart my Fitbit device?

Review hard reset matrix (device-specific procedures)

The section below shows the precise and advanced reset steps required for high-end devices:

Device model	Failure type	Required action & sequencing
Fitbit Sense or Sense 2	Standard restart or reboot	Press and hold the side button for 10 seconds until the Fitbit logo appears on the screen, then release.
Fitbit Sense 2	Critical boot loop or bricking (Factory Reset)	1. Plug into charger. 2. Press and hold the button approximately 8 seconds until the screen turns off. 3. Release the button upon short vibration. 4. Immediately press and hold the button again. 5. Release when the blue logo appears and disappears. 6. Immediately press and hold one final time until a vibration is felt (this triggers the factory reset).
Fitbit Versa Series (Legacy or Lite)	Hard Restart	Press and hold the back (left) and bottom (right) buttons simultaneously for 10 seconds until the logo appears, then release.
Charge 5, Charge 6, or Luxe	Device Factory Reset (In-Menu)	Swipe down from clock. Go to the Settings app. Tap Device Info Clear User Data. The device often requires connection to the charger for this option to become visible.

If the update still fails:

1. Log in to your Fitbit account on a different phone or tablet and attempt the update.
2. Ensure Bluetooth is off on the original phone to avoid conflicts.
3. Contact Customer Support.

Having trouble updating Fitbit Versa Lite Edition?

If you can’t update Fitbit Versa Lite Edition, check the firmware version on your watch:

1. Open the Settings app on your watch, then tap About.
2. Check if the number under “Version” is “38.6.1.1.” If it is, attach your watch to the charging cable and plug it into a USB port on your computer before you begin the update.
3. Keep your Fitbit device close to your phone or tablet to complete the update.
4. In a few days, you’ll receive another prompt to update your watch. At that point, you can update as normal without plugging your watch into a computer.

No Clock after update

If you see a clock error message on your watch's screen after the update, choose a clock face in the Fitbit app to resolve the problem. For more information, go to How do I change the clock face on my Fitbit device?