How to fix an Apple iPhone XS Max to won’t sync with Fitbit [Troubleshooting Guide]

In order to get started using Fitbit watch or tracker, you will need to connect or pair it to your Fitbit account using a phone or other smart devices. For as long as you have your Fitbit account set up properly, the data collected by your Fitbit device should sync with the Fitbit app/dashboard on your iPhone. You can view stats, analyse trends based on history, set goals, create logs, connect with your friends and other a lot more. Data syncing between Fitbit trackers and smartphones are carried out through BLE or Bluetooth Low Energy technology. When your phone is paired to the Fitbit app, it typically syncs every time you open the application. You can also set your device to sync periodically throughout the day by enabling All-Day sync.

Nonetheless, there are some factors that can impede the syncing process between your phone and Fitbit. In fact, several iPhone owners have had trouble syncing their phone and Fitbit device. To address this issue, I’ve outlined some of the highly recommended workarounds and potential solutions to Fitbit syncing problem on iOS 12 or later versions. Read on to learn what to do in case your iPhone XS Max won’t sync with Fitbit.

For those who are looking for a solution to a different problem, drop by our troubleshooting page for we have already addressed some of the most common issues with this phone. Browse through the page to find issues that are similar with yours and use the solutions we suggested. If they don’t work for you or if you still need our help, contact us anytime through our iPhone issues questionnaire.

How to troubleshoot iPhone XS Max that won’t sync with Fitbit?

Before troubleshooting, check and ensure that your Fitbit watch or tracker is compatible with your iPhone XS Max. If they’re compatible but don’t sync, then go ahead and try applying any of these recommended solutions.

First solution: Restart iPhone and Fitbit tracker, then sync again.

If you were able to sync your devices before but suddenly they failed, then that’s likely just a random glitch. And the simplest way to get rid of such glitches is a device restart. To clear out minor software errors on the phone system that impedes syncing, soft reset or restart your iPhone XS Max with these steps:

  1. Press and hold the Side/Power button and either Volume buttons simultaneously for a few seconds.
  2. Release the buttons when the Slide to Power Off command appears and then drag the power off slider to the right.
  3. After 30 seconds, press and hold the Power/Side button again until the phone reboots.

To clear out random glitches on your Fitbit system, also restart your Fitbit watch or tracker. After restarting both devices, follow these steps to manually sync them again:

  1. Open the Fitbit app.
  2. Then tap the Account icon from the Fitbit app or dashboard.
  3. Tap to select your device tile.
  4. Then tap the option to Sync Now.

To view when was the last time your device synced, head over to the Fitbit app or dashboard then tap the Gear icon. The last sync time will be shown right below the image of your Fitbit watch or tracker.

Second solution: Turn Bluetooth off and on again.

This could also be a problem with the phone’s Bluetooth system. For minor issues affecting the phone’s Bluetooth functions, turning Bluetooth off and on usually takes care of them. Thus if you haven’t already, follow these steps to refresh Bluetooth functions of your iPhone XS Max:

  • Go to your iPhone Settings-> Bluetooth menu, then tap the switch to turn Bluetooth OFF. After a few seconds, toggle the switch to turn Bluetooth back on again.

When Bluetooth is enabled, pair or connect your iPhone XS Max to your Fitbit watch or tracker and then see if they’re already syncing.

Alternatively, you can try the Airplane Mode trick. It’s an old trick that’s been used to rectify random problems affecting wireless functions of an iPhone and that includes Bluetooth pairing or syncing errors. If you wish to give it a shot, then here’s how it’s done:

  1. Go to Settings-> Airplane Mode menu.
  2. Then toggle the switch to turn Airplane Mode ON. Doing so will disable the phone’s wireless radios including Wi-Fi and Bluetooth connections.
  3. Restart or soft reset your iPhone XS Max while Airplane Mode is enabled.
  4. After the phone reboots, head back to Settings-> Airplane mode menu and then tap the switch again to turn Airplane mode OFF.

Enable Bluetooth and pair your iPhone with your Fitbit device again.

Third solution: Update iOS and Fitbit app.

Installing the latest software update for your iPhone and Fitbit device can also help fix software-related issues including those affecting wireless features. Software updates not only bring in new features but also offer fix patches to get rid of existing bugs the have ruined the system. If your iPhone has stable access to Wi-Fi internet, then you can check for new iOS update to download and install with these steps:

  1. From your Home screen, tap on Settings.
  2. Select General.
  3. Then tap Software Update.

If a new iOS version is up for grabs, you will be prompted with an update notification. Simply follow the onscreen instructions to download and install new update on your phone. Don’t forget to restart your iPhone after updating to prevent apps from acting up and likewise to ensure that all new system changes are properly implemented.

Installing pending app updates, particularly for Fitbit is also imperative. This will potentially solve the problem if in-app bugs and malwares are to blame. Aside from app updates, it is also recommended to update your Fitbit device. If possible, check your Fitbit tracker’s menu to view the latest firmware update available then follow the onscreen prompts to download and install update. Also restart your Fitbit device after updating to refresh its memory and system functions.

Fourth solution: Unpair Fitbit device from your iPhone XS Max.

The connection between your iPhone and Fitbit device might have been corrupted. Should this be the case, then you will need to unpair your devices to start a new and fresh connection. So here’s what you should do on your iPhone XS Max then:

  1. Tap Settings from the Home screen.
  2. Select Bluetooth.
  3. Tap to enable Wi-Fi, if necessary.
  4. Find then select the Bluetooth device you want to forget.
  5. Tap the information “i” icon next to the name of the Fitbit device.
  6. Then select the option to Forget this Device.
  7. If prompted, tap Forget to confirm action.

The Fitbit device will then be removed and unpaired from your iPhone. The next thing to do is to restart both devices and then pair them again.

  • To do this, head over to your iPhone Settings-> Bluetooth menu and make sure Bluetooth is turned ON. Find your Fitbit watch or tracker from the list of available Bluetooth-enabled devices.

If you can’t find it, then restart your Fitbit device. Once you find your Fitbit, select it and then pair it with your iPhone again.

Fifth solution: Reset network settings on your iPhone XS Max.

Performing software resets is often needed to deal with tough software issues on the phone. Since the problem you’re dealing with is network-related, performing a network settings reset is recommended. This will clear out all your current network configurations including Wi-Fi networks and Bluetooth connections. Network errors inflicted by incorrect network settings are likewise obliterated in the process. Here’s how it’s done:

  1. From your Home screen, tap on Settings.
  2. Select General.
  3. Scroll down to and then tap on Reset.
  4. Select the option to Reset network settings.
  5. If prompted, enter your passcode then follow the onscreen instructions to confirm network settings reset.

Wait for your phone to finish resetting and then restarts automatically. As soon as it boots up, set up Wi-Fi networks to restore Internet functions and enable Bluetooth to pair and sync your iPhone to your Fitbit device again.

If none of that works, then you may try to delete the problematic Fitbit account from your iPhone XS Max and then create a new one. This should rule out account-related issues like invalid account setup from the underlying cause. Deleting a Fitbit account on the iPhone XS Max can be done in two ways. Each of these methods is demonstrated below.

  1. Deleting Fitbit account via Fitbit app
  1. Open the Fitbit app.
  2. From the Fitbit app dashboard, tap the Account icon.
  3. Scroll down and tap the option to Manage Data.
  4. Then tap Delete Account.
  5. Follow the onscreen instructions to complete the Fitbit account deletion process.
  1. Deleting Fitbit account via dashboard
  1. Navigate to the dashboard then tap the Gear icon.
  2. Tap Settings.
  3. Scroll down then tap the option to Delete Account.
  4. Follow the onscreen instructions to confirm Fitbit account deletion.

After deleting the account, you can proceed and create a new one. Once the account is set up successfully, pair your iPhone XS Max with your Fitbit device then see if they’re already able to sync.

Other options

Try pairing your iPhone XS Max with other Fitbit tracker or watch. If the phone syncs with your other device, then the problem is on the Fitbit tracker/watch. In that case, you should contact Fitbit support via chat, phone, or email. Let them know about the problem you encountered when attempting to pair your Fitbit device with your iPhone XS Max. There might be some advanced settings on the Fitbit watch or tracker the need to be reconfigured for the device to sync properly with your new iPhone.