What you need before you start
Your Fitbit connects to your phone through the official Fitbit app, which acts as the bridge between your device and your phone's operating system. Before you begin, make sure you have a Fitbit device that is charged (most need at least 10 percent battery), a smartphone running iOS 13 or later (iPhone) or Android 8.0 or later (Android), and Bluetooth turned on in your phone's settings.
The connection process is the same whether you own a Fitbit Charge, Fitbit Sense, Fitbit Inspire, or any other current model. The app itself handles all the pairing work — you do not need to manually search for your device in your phone's Bluetooth settings. If you already have the Fitbit app installed from a previous device, you can still follow these steps; the app will simply add your new tracker to your account.
Key Takeaways
- Download the Fitbit app from the Apple App Store or Google Play Store, then create or sign into your Fitbit account before pairing any device.
- Open the Fitbit app, tap the plus icon to add a new device, and select your Fitbit model from the list to start pairing.
- Hold your Fitbit close to your phone during pairing, which usually takes 30 seconds to two minutes and requires Bluetooth to be on.
- If pairing fails, restart both your Fitbit and your phone, then try again — this solves most connection problems.
- Once paired, your Fitbit syncs automatically whenever it is within Bluetooth range of your phone, usually several times per day.
Download the Fitbit app and sign in
Open the Apple App Store (iPhone) or Google Play Store (Android) on your phone. Search for "Fitbit" and look for the app with the Fitbit logo — a small circle divided into four colored sections. Tap "Get" or "Install" and wait for the download to finish. The app is free and takes about 30 seconds to a minute to download on a standard connection.
Once the app is installed, open it and tap "Create Account" if you are new to Fitbit, or "Sign In" if you already have a Fitbit account. You will need an email address and a password. If you are creating a new account, you will also choose your age, height, weight, and gender — Fitbit uses these to calculate calories burned and other metrics. Write down your password somewhere safe; you will need it if you ever reinstall the app or switch phones.
Start the pairing process in the app
Once you are signed in, you will see the home screen with your profile picture in the top left corner. Look for a plus icon (usually in the top right or bottom of the screen, depending on your phone model) and tap it. The app will show you a list of Fitbit devices — find your model and tap it. Common models include Fitbit Charge 5, Fitbit Sense 2, Fitbit Inspire 3, and Fitbit Ace 3.
After you select your device, the app will ask you to hold your Fitbit close to your phone. This is important: keep them within a few inches of each other during the next step. The app is about to search for your device using Bluetooth, and proximity makes the connection faster and more reliable.
Complete the Bluetooth pairing
The app will now scan for your Fitbit. You should see a message like "Looking for your device" or "Searching for Fitbit." This usually takes 30 seconds to two minutes. During this time, make sure Bluetooth is turned on in your phone's settings — if it is off, the app will prompt you to turn it on. Do not move your Fitbit away from your phone or close the app while it is searching.
When your Fitbit is found, the app will display its name and ask you to confirm the pairing. Tap "Pair" or "Connect" to complete the link. You may see a Bluetooth pairing request pop up on your phone asking for permission — tap "Pair" again if this happens. Once the pairing is complete, you will see a confirmation screen, and your Fitbit will vibrate or light up to signal success.
Set up your device preferences
After pairing, the app will walk you through a few setup screens. You can choose your watch face (if your device has a screen), set your time zone, and decide which notifications you want your Fitbit to show — for example, incoming calls, text messages, or calendar reminders. You can change all of these later, so do not worry about getting them perfect right now.
The app will also ask whether you want automatic syncing turned on. This is the default setting and is what you want — it means your Fitbit will send your step count, heart rate, and other data to the app whenever it is near your phone. Leave this on unless you have a specific reason to turn it off.
Troubleshoot if pairing fails
If the app cannot find your Fitbit after two minutes, the most common fix is to restart both devices. First, restart your phone by turning it off and back on. While your phone is restarting, restart your Fitbit — most models do this by holding down the button on the side or back for 10 to 15 seconds until you see the Fitbit logo appear on the screen. Once both devices are back on, open the Fitbit app and try pairing again.
If restarting does not work, check that Bluetooth is actually on in your phone's settings. On iPhone, swipe down from the top right corner and look for the Bluetooth icon (it looks like a sideways fan). On Android, swipe down twice from the top and tap "Bluetooth" to turn it on. Also make sure your Fitbit battery is not completely dead — if the screen does not light up when you press the button, charge it for at least 15 minutes before trying again.
If you still cannot pair after restarting and checking Bluetooth, try uninstalling and reinstalling the Fitbit app. Open your phone's app store, find the Fitbit app, and tap "Uninstall" or the trash icon. Then download it again and sign back in. This clears out any corrupted files that might be blocking the connection.
Verify your Fitbit is syncing
Once pairing is complete, your Fitbit should sync automatically. To check that it is working, open the Fitbit app and look at your home screen — you should see today's step count, distance, and calories burned. If these numbers are zero or have not updated in several hours, your Fitbit may not be syncing. Make sure Bluetooth is still on and that your Fitbit is within about 30 feet of your phone.
You can also force a manual sync by opening the app and pulling down on the home screen (like refreshing a web page). Your Fitbit will vibrate when the sync is complete. If manual syncing works but automatic syncing does not, go into the app's settings and turn off automatic syncing, then turn it back on — this often fixes the issue.
Frequently Asked Questions
Can I connect my Fitbit to multiple phones?
Your Fitbit can only be paired to one phone at a time. If you want to switch to a different phone, you will need to unpair it from the old phone first. Open the Fitbit app on the old phone, go to settings, find your device, and tap "Unpair." Then follow the pairing steps on your new phone.
Why does my Fitbit keep disconnecting from my phone?
Fitbits disconnect when they move out of Bluetooth range (usually beyond 30 feet) or when Bluetooth is turned off. They reconnect automatically when you come back into range. If your Fitbit disconnects even when your phone is nearby, restart both devices and check that your phone's Bluetooth is on. Older Fitbit models sometimes need the app updated — check your app store for updates.
Do I need to be connected to WiFi for my Fitbit to work?
No. Your Fitbit syncs through Bluetooth, not WiFi. It will sync whenever it is near your phone, whether or not your phone is connected to WiFi. However, some features like weather on your watch face do require an internet connection on your phone.
What happens if I lose my phone?
Your Fitbit will continue to track your steps, heart rate, and sleep even without your phone nearby. When you get a new phone and install the Fitbit app, your old data will still be there — it is stored in your Fitbit account, not just on your device. Sign in with the same email and password, pair your Fitbit to the new phone, and all your history will sync back to the app.
Can I use my Fitbit without the app?
Your Fitbit will track your activity without the app, but you will not be able to see your data or change settings. The app is what displays your steps, heart rate, sleep, and other information. You can view some data on the device itself if it has a screen, but the full picture only appears in the app.