The case of Fitbit is not syncing; the term “Syncing” refers to the data transfer between your Fitbit fitness tracker and the Fitbit app. This syncing primarily happens via Bluetooth connection. This connection is what the iPhone pairs with the tracker, causing the Dashboard (on your phone) to stay updated with all your daily activity and fitness stats like steps taken, calories burned, heart rate level and sleeping habit.

Your Fitbit wristband is nothing without a Fitbit app (iOS and Android). Only when both the devices are synced right, it lets you do all the stuff smoothly. Products like Fitbit flex, one, Charge, Charge HR, Alta and Blaze, all has this issue as per our research,but it is absolutely rectifiable. However, plenty of users facing the problems while syncing their iPhone with the Fitbit app. So what’s causing this Fitbit not syncing with iPhone issue? And how to fix without any glitch? So, here is a detailed article that explains handy tricks to troubleshoot the problem.

The Set Up

Fitbit has Bluetooth low energy (BLE) technology that lets its app synchronize with the Fitbit fitness tracker. To initiate this sync, all you have to do is to open the Fitbit app and follow few steps. Fitbit does not carry syncing set up in Airplane mode. Manually turn on the Bluetooth on your iPhone or any PC devices to sync your tracker with the Fitbit app.

How To Connect the iPhone With Fitbit App?


Step 1: From the Fitbit app’s dashboard > tap the Account tab.

Step 2: Tap your tracker to see an option for syncing immediately.

Once you have done the setup as per procedure, the device’s data should sync automatically with the Fitbit account. However, there are times when there might be syncing issues. The primary reason for failure in the Fitbit-iPhone pairing is due to unmet requirements.

Hence, it is vital to verify the requirements first. If the problem persists, follow the troubleshooting steps to fix the problem:

How To Fix Fitbit Not Syncing With iPhone Issue


1. Verify the Requirements Before Syncing

  • Check if the Fitbit supports your iPhone device.
  • Fitbit frequently adds support for new devices to connect to the Fitbit app.
  • Ensure that the software is up-to-date with the latest version. To check this on iOS, tap on Settings > General > Software Update.
  • Verify that the Fitbit Bluetooth is enabled to sync to iPhone. To check this on iOS—tap on Settings > Bluetooth.

2. Set Up The Fitbit App With iPhone via Bluetooth


  • Turn off the Fitbit Bluetooth dongle and then turn it back on.
  • Open the Fitbit app to set up the Fitbit.
  • If Fitbit is not syncing, force quit the Fitbit app and open it again.
  • If your Fitbit tracker still does not synchronize, reboot your mobile device and open the Fitbit app again.

3. Try the Old Trick – Restart

Restart your Fitbit to reset the iPhone connection. This can help you overcome the Fitbit syncing issues.

  • Make sure your battery is fully charged.
  • A dead tracker will not be able to sync with your iPhone.
  • Try closing the Fitbit app and then open it again to get the Fitbit to connect via Bluetooth.
  • Turn off the tracker’s Bluetooth to temporarily disconnect the iPhone. Switch it on again to connect the Fitbit app.
  • Turn your iPhone off and then on one more time.

4. Uninstall and Reinstall The Fitbit App On Your iPhone

  • Uninstall the Fitbit app from your phone and restart the phone.
  • Reinstall the app and run it again.
  • If the Fitbit still does not sync with the iPhone, try resetting the tracker. This is for dire situations but works sometimes.

5. Try To Clear the Bluetooth Connection List From iPhone

Not many of us don’t care Bluetooth connection list. If your iPhone is managing more than 3-5 Bluetooth connections simultaneously, it may have difficulty synchronizing with your Fitbit tracker. Hence, disconnect or remove the other devices from the link list. Try pairing only one Bluetooth device to synchronize. Also, sending call or text notifications to your tracker may experience interruptions with any consistently streaming Bluetooth connections.


Usually, the above-mentioned tricks will fix the syncing issue in every possible way. However, for some reasons, if the problem persists, then the device you bought a faulty one, so I recommend you to contact the Fitbit’s customer support for assistance or check their official help website here.

Also read this: Fitbit Charge: 3 Ways To Fix Fitbit Not Charging Issue