How to fix an Apple iPhone XS that fitbit one won’t sync

Need help regarding fitbit one won’t sync with your new iPhone XS? So you’ve set up Fitbit and paired it with your iPhone but for some reasons your Fitbit tracker is not syncing back to your iPhone when it’s supposed to. If that is so, then keep reading for more information. The Fitbit app is supposed to initiate a sync anytime time you open it on your iPhone.

After adding a tracker to the Fitbit app, the app will start combining all the data from the trackers you have synced to your iPhone and give you the combined totals of all your activity on your dashboard. If you’ve enabled the All-Day sync option, the tracker will then sync to the Fitbit app periodically throughout the day. But enabling this option can also cause your iPhone and Fitbit tracker battery to drain faster than usual. If you notice that your Fitbit tracker is not syncing to your Fitbit app, then something is wrong and you need to do something to fix it.

This could be a problem with the Fitbit app on your iPhone XS, if not the Fitbit tracker itself. That being said, you need to work on the Fitbit application, the tracker, and your iOS device. Read on to find out how to troubleshoot the problem and get Fitbit to sync with your Apple iPhone XS handset.

Before troubleshooting, check and ensure that your Fitbit tracker battery is fully charged or has enough power to operate. If not, then charge it first. Also make sure that you’ve set up a Fitbit account on your iPhone. If you’re Fitbit app is outdated, then install new update for the app. More importantly, verify if your Fitbit tracker is properly paired with your iPhone.

If you’ve met all these requisites but still can’t get Fitbit to sync with your iPhone XS, then try applying these methods.

First solution: Quit/end the Fitbit app and then open it again.

To clear out minor app glitches that might have halted the syncing process between Fitbit and iOS, restart Fitbit on your iPhone XS with these steps:

  1. From the Home screen, swipe your finger up and then pause.
  2. Swipe right or left to navigate through apps preview.
  3. Then swipe up on the Fitbit card/preview to force close the application.

Then launch the app again from the Home screen and see if it’s already working and syncing with your phone.

Second solution: Restart your iPhone (soft reset).

Random software errors on the phone can also cause conflicts and may stop apps from working as intended. To fix the problem, restarting or performing a soft reset is recommended. For starters, a soft reset on the iPhone XS is carried out this way: 

  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.

Also restart your fitbit one won’t sync to refresh its system. On your tracker device, go to Settings-> About menu then select the option to Shutdown. After a few seconds, turn it on again.

After restarting both your iPhone and tracker, launch the Fitbit app and see if it’s already syncing with your iPhone XS. If it’s still not, then continue to troubleshoot.

Third solution: Toggle Bluetooth OFF and then back ON.

For as long as Bluetooth is enabled and your iPhone XS is paired with your Fitbit tracker, both devices should sync unless something went wrong like when the Bluetooth connection becomes corrupted and fails to work as intended. To fix Bluetooth problems like this, you can use the old Bluetooth toggle trick depicted with these steps:

  1. Go to your iPhone Settings-> Bluetooth menu.
  2. Then tap the Bluetooth switch to turn OFF.
  3. While Bluetooth is turned OFF, restart your iPhone.
  4. Then turn Bluetooth ON again from the Settings-> Bluetooth menu.

Wait until Bluetooth is re-enabled and then open the Fitbit app and see if a sync occurs. If it doesn’t sync, close the Fitbit app and open it again. A sync should occur as soon as the app launches again.

Fourth solution: Uninstall then re-install the Fitbit app.

If you’ve recently updated Fitbit app on your iPhone, then there may be some bugs that trigger problems with the application. In this case, uninstalling and re-installing the app will likely fix it. Here’s how to delete Fitbit app from your iPhone XS Home screen:

  1. From the Home screen, tap and hold on an app icon until the icons start jiggling.
  2. Tap the X on the Fitbit app icon.
  3. Read the warning prompt, and then select Delete to confirm deletion of the app.

If you can’t find Fitbit app from the Home screen, then you can delete the app from your iPhone settings. Here’s how:

  1. Tap Settings from the Home screen.
  2. Select General.
  3. Tap on iPhone Storage.
  4. Select Fitbit.
  5. Then tap the option to Delete App.

The app will then be removed or uninstalled from your phone. After uninstalling Fitbit, restart your iPhone and then re-install Fitbit from the App Store.

Fifth solution: Remove your tracker from Fitbit app then add it back.

Syncing problems that are attributed to a corrupted Bluetooth device are usually solved by forgetting or removing the device and then adding it back. Should the problem you’re dealing with Fitbit syncing is tied to a corrupted tracker, then removing and re-adding it on your iPhone should fix it. So here’s what you can try doing then:

  1. Open the Fitbit app.
  2. Navigate to the Account section.
  3. Then select the tracker you want to remove.
  4. Scroll down and choose the option to Remove This [Fitbit].
  5. Then tap Remove This [Fitbit] again to confirm.

The tracker will then be removed along with all its data from the Fitbit app. If you’ve added several trackers on your phone, then you should remove them all to prevent any of them from causing conflict. Just follow the same steps to remove all your trackers. After successfully removing the tracker, restart your iPhone and then add the tracker to the Fitbit app on your phone again. Here’s how:

  1. Open the Fitbit app from your Home screen.
  2. Tap on the Account tab.
  3. Select the option to Set Up a Device.
  4. Scroll through the menu by swiping up or down until you find the model of the tracker you want to add.
  5. Tap to select your Fitbit model.
  6. Then choose the option to Set Up Your Fitbit.

Wait until the set up is finished and once it’s done, the Fitbit app should start collecting data from the tracker you synced to your iPhone.

Seek more help

If the problem persists and you still can’t get Fitbit to sync with your iPhone XS, then you can try asking for help from the Fitbit support team. You can reach them through live chat or by visiting Fitbit Help or Fitbit Support on Twitter.

I hope that we’ve been able to help you fix the problem with your device. We would appreciate it if you helped us spread the word so please share this post if you found it helpful. Thank you so much for reading!

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