Reasons Why Fitbit Not Syncing

Why is My Fitbit Not Syncing with My Phone
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Fitbits may not have been the first fitness trackers invented, but Fitbit’s line of trackers are among the most popular in the market.

Fitbit is a wearable technology that is designed to help individuals measure their number of steps walked, stairs climbed, heart rate, quality of sleep, and others.

In order for you to monitor everything, it comes with a phone application.

However, some of you might have been in a situation wherein you ask yourself the question “Why is my Fitbit not syncing with my phone?”

This is unfortunate because the Fitbit app is designed to help you become more active, eat a more balanced diet, and sleep better, which are all necessary for you to become a healthier person.

Initially, if your Fitbit refuses to sync with your phone, you might think that the device is faulty and needs replacement. At times, you might even consider that your mobile phone has a problem.

Before jumping to these conclusions, we would like you to know that there are actually a few possible reasons behind the problem. To help you out and for you not to panic, we will provide you with the most common ones. We will also suggest some solutions so that you can fix the issue.
In this article, we take a look at how to get your Fitbit set up and synced to your phone – and how to troubleshoot it if you lose your connection between the devices.

Which Phones Work With Fitbit Trackers?

All Fitbit trackers can sync via Bluetooth to all modern Android smartphones and iPhones.

However, only Windows phones running Windows 10 Mobile are able to sync to a Fitbit. This is because the official Fitbit app is unavailable on older Windows phone operating systems.

What Happens During a Fitbit Phone Sync?

When syncing your Fitbit device to your smartphone, the Fitbit device wirelessly connects to your phone via Bluetooth. During this process, all of your fitness activity is sent to the Fitbit app on your smartphone, which then sends all of the new data to the Fitbit servers through WiFi or your cellular network.

During a sync, the Fitbit app can also send information back to the Fitbit device. If fitness activity has been collected and recorded through another source for the same account, this data will be downloaded to the tracker to reflect the correct amount of activity you performed on that day.

Furthermore, syncing also updates the time on your Fitbit tracker when traveling to a different time zone or during daylight savings time.

What You Need to Sync Your Fitbit

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To sync your Fitbit fitness tracker to your smartphone, you’ll need the following:

  •  The free Fitbit smartphone app. If you’re using an Android device, you can download the app for free from Google Play Store. Those using an iOS device will need the Fitbit app from the App Store. Windows phone users will have to download the Fitbit app from the Microsoft Store.


  • A Wi-Fi or cellular internet connection. With an online connection, the Fitbit app can send the data to the Fitbit servers, and vice versa.


  • A phone with Bluetooth capability. All modern smartphones support Bluetooth so it’s almost a certainty that yours will have it. Bluetooth is a wireless technology used to wirelessly sync your Fitbit tracker to your smartphone.

How to Sync a Fitbit with Your Phone: Getting Started

With your new Fitbit in hand, the first thing you’ll want to do is to download the Fitbit app from the App Store (for iPhone users) or Google Play (for Android users). After downloading the app, you’ll either have to sign up for a new Fitbit account or log in if you have a pre-existing one.

From here, you’ll be able to choose your Fitbit device model and start the setup process. This process includes entering account details and personal information, including your age, weight, height, and other pertinent details to help the device help you achieve your fitness goals.

After the initial setup, your Fitbit tracker should regularly sync to your smartphone in the background. It’s usually not necessary to manually sync your data.

Why is My Fitbit Not Syncing with My Phone?

Fitbit Not Syncing?

“Why won’t my fitbit sync?”

If you find yourself asking these question, this guide is for you.

How to troubleshoot syncing your Fitbit with an Android or iPhone

When everything’s working properly, your Fitbit works effortlessly in the background, syncing your computer or phone and keeping you informed about your health and fitness data whenever you need it.

However, technology doesn’t always work the way you expect, and you might sometimes encounter syncing problems.

If you can usually sync but your Fitbit suddenly refuses to work, it’s often the result of a problem with your wireless connection. In such cases, toggling your device’s Bluetooth can help. Resetting your Fitbit or the device you’re syncing can also resolve a lot of common issues.

If you’re looking for specific advice on how to sync your Fitbit with your Android device, iPhone, Mac, or PC, keep on reading.

  • Syncing with Your Android Device
    If your Fitbit isn’t syncing with your Android smartphone, try these troubleshooting steps. After each step, try to sync and see if that solved your issue.

    • Your Fitbit app might not be working properly, so close the app and try again.
    • Make sure Bluetooth is turned on. Pull down the Notification drawer from the top of the screen to see the Quick Settings icons and double-check if Bluetooth is turned on.
    • Make sure your Fitbit is connected to your Android smartphone via Bluetooth. Start the Settings app and click Connections, then click Bluetooth. Find the entry for your Fitbit in the list and if it’s not connected, tap it to try to connect. If it doesn’t work, tap the gear icon and click Unpair. Then, repeat the setup process for your Fitbit to reconnect it to your phone.
  • Syncing with Your iPhone
    All the same troubleshooting steps apply for iPhone, though the exact procedure will vary. After each step, try to sync and see if that solved your issue.

    • Your Fitbit app might not be working properly, so start by forcing the app to close and then restart it. See if this fixes your problem.
    • Make sure Bluetooth is turned on. Pull down the Control Center and make sure that the Bluetooth icon is enabled. If it’s on, toggle it off and back on again.
    • Make sure that your Fitbit is connected to your iPhone via Bluetooth. Open the Settings app and click Bluetooth. Find the entry for your Fitbit in the list and if it’s not connected, tap it to try to connect. If it doesn’t work, choose Forget this Device. Then, repeat the setup process for your Fitbit to reconnect it to your phone.

More Detailed Fixes on “fitbit not syncing” Issues

Some of us might think that the causes of the syncing problem are too complicated and you might not be able to comprehend the solutions. Fortunately, the top reasons why your phone and Fitbit won’t sync are too basic and can easily be resolved without the help of a technician.

Bluetooth Issues

Most of the time, people fail to recognize that there Bluetooth is not actually switched on or enabled. If you have verified that such is the case, then you can simply change the settings. For Android users, go to the phone settings, then look for the Bluetooth tab which is usually under “Connections.” Enable or switch it on and change the settings to “visible to all nearby devices.”

If you are running Android version 6.0 and 7.0, then it is important to note that your Bluetooth syncing can only work when you turn on the location services on your phone. To turn on the location service on your Android device, go to your phone settings, click location and choose the option which says “Grant Access.”

While checking your Bluetooth connections, you should also ensure that your phone is not managing multiple Bluetooth connections simultaneously. If it does, then the Fitbit and your phone won’t be able to sync properly due to interruptions from the other devices.

In addition, you must also make sure that your phone is not in Power Saving Mode when you are trying to sync your tracker and phone. If the power saving mode is on, it has the potential to cause your phone to disable Bluetooth just to save battery.

In case Bluetooth connection is really weak, you can enhance it by making use of the “Always Connected” mode on your Fitbit device. Do take note though that the battery of your tracker will drain faster in this setting.

Connectivity Range Problems

You must remember that Bluetooth connectivity has a range requirement. This means that your Fitbit and phone should not be too far from each other. Most of the time, for the devices to be synced, they should be at most 15 to 20 feet away from each other.

Low Battery

If your tracker battery is low, there is no way it is going to sync with your phone. Hence, be sure to check your Fitbit’s battery level before attempting to sync the two devices.

Weak Internet Connection

Besides Bluetooth, you need to be connected to the internet before the sync can work. The common mistake is that people assume that any type of internet connection will work. The thing is it must be a strong one before the syncing could happen. With that said, ensure that your internet connection is strong enough before you sync your tracker to your mobile device.

Outdated Phone Software

If your phone does not have the latest Android or iOS version, then it will have a hard time connecting to the tracker. So, just make sure that your phone software is updated at all times. To do this, for Android devices, go to your phone settings, click the “About Phone” tab and click on system update. For iOS users, go to settings, then proceed to “General” and click on software update.

If you wish for your Fitbit tracker to sync with the Fitbit app on your mobile phone periodically, then it is recommended that you turn on the “All-day Sync” mode. However, keep in mind that by doing so, the battery of your tracker will drain faster than usual.

How to Troubleshoot Syncing Issues?

If all the above-explained steps are taken, and the requirements are met, then your phone and your Fitbit should sync without any problem.

However, if the syncing still fails, then it is time to troubleshoot your devices. Do not fret though because there are a lot of solutions to this problem.

First, you would need to turn off the phone’s Bluetooth and then switch it back on. After that, launch your Fitbit app. If Fitbit still does not sync with your mobile phone, then force quit the tracker app and re-launch it. If that still does not work, then you should reboot your mobile phone and launch the Fitbit app again. If nothing still happens, then you would need to restart your tracker. If all those solutions fail, then you should uninstall and reinstall the Fitbit app. This will likely solve the syncing issue.

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General Fitbit Syncing Tips and Solutions

“Why is my Fitbit not syncing with my phone?” is a question that has been asked probably thousands of times. There are a number of reasons that can cause the inability to sync, and most of those are just the things we failed to do.

Hence, fixing those issues are easy and non-technical.

You will only need to troubleshoot when all the basic solutions fail to work. With that said, to ensure that syncing takes place without any problem, again, please take a good look at your phone’s and Fitbit trackers settings, connections, and battery levels.

Here are some general Fitbit syncing tips and solutions to keep in mind.

  • Only sync to one device at a time. One of the most common causes of sync problems is a Fitbit device being paired with more than one device at the same time. Doing so may seem like a great idea, but it can cause the Fitbit to get confused and eventually it will refuse to sync with anything and may require a hard reset. An easy solution is to only keep Bluetooth turned on for one device – the one you want your Fitbit to sync with.


  • Turn on Bluetooth. Bluetooth is important for a Fitbit device to sync with a phone. If you have a habit of putting your device in Flight or Airplane mode (which disables Bluetooth), make sure to turn it off before trying to sync your fitness data.

The Bottom Line

Syncing your Fitbit device to your Android smartphone or iPhone is the easiest and fastest way to send your latest fitness activity to your Fitbit account.

If your Fitbit will not sync with your iPhone or Android smartphone, make sure to try the abovementioned tips.

Good luck!

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