Fitbit and Apple Health can sync, but only in one direction

Fitbit devices send data to Apple Health, but Apple Health does not send data back to Fitbit. This one-way sync means your steps, heart rate, sleep, and calories from your Fitbit will appear in the Apple Health app on your iPhone, but information you log directly in Apple Health (like workouts or nutrition) will not flow into the Fitbit app.

The sync happens automatically once you set it up, and you do not need to manually transfer data between the two apps. However, the setup process requires you to grant permission in both the Fitbit app and Apple Health, and the connection can break if you change your Apple ID password or revoke access.

Key Takeaways

  • Fitbit data flows into Apple Health automatically, but Apple Health data does not flow back into Fitbit.
  • You must enable the connection in the Fitbit app under Settings > Connected Apps, then confirm permission in Apple Health.
  • The sync works only on iPhone; Android users cannot use Apple Health at all.
  • If the sync stops working, check that you have not changed your Apple ID password and that the Fitbit app still has permission to access Apple Health.

How to turn on Fitbit-to-Apple Health sync on iPhone

Open the Fitbit app and tap your profile icon in the bottom right corner. Select Settings, then scroll down and tap Connected Apps. You should see Apple Health listed as an option. Tap it, then tap Turn On or Connect (the exact wording depends on your Fitbit model and app version).

The Fitbit app will redirect you to Apple Health and ask you to confirm that Fitbit can access your health data. Tap Allow or Turn On Health Sharing. You will see a list of data types—steps, heart rate, sleep, calories, and others—that Fitbit wants permission to send. You can toggle individual data types on or off if you want to block certain information from syncing. Once you confirm, return to the Fitbit app. The sync should begin within a few minutes.

If you do not see Apple Health in the Connected Apps list, make sure you are running the latest version of the Fitbit app. Check your device's app store for updates, close the app completely, and try again.

What data actually syncs from Fitbit to Apple Health

Steps, distance, active minutes, calories burned, heart rate, and sleep data all sync from Fitbit to Apple Health. The exact list depends on your Fitbit model—newer devices like the Sense and Versa 3 send more data types than older trackers. You can see which data types are syncing by opening Apple Health, tapping the Browse tab, and looking for Fitbit as a source under each category.

Data syncs throughout the day as your Fitbit collects it, though there is usually a delay of 15 to 30 minutes between when your Fitbit records something and when it appears in Apple Health. If you manually log a workout or meal in the Fitbit app, that information does not sync to Apple Health—only the automatic measurements from your device do.

Why the sync might stop working

The most common reason the sync breaks is a password change. If you change your Apple ID password, the Fitbit app loses permission to access Apple Health and the sync stops. To fix this, open the Fitbit app, go to Settings > Connected Apps, tap Apple Health, and tap Turn On again. You will be asked to sign in with your Apple ID and re-grant permission.

Another reason is that you revoked Fitbit's access in Apple Health itself. Open Apple Health, tap your profile icon in the top right, select Apps, find Fitbit, and check whether it still has permission to read and write health data. If the toggle is off, turn it back on. If Fitbit does not appear in the Apps list at all, you will need to reconnect it through the Fitbit app as described above.

Occasionally the sync fails because the Fitbit app is out of date or because your iPhone needs a restart. Close both the Fitbit app and Apple Health completely, restart your iPhone, and open the Fitbit app again. If the sync still does not work after 30 minutes, check the Fitbit website or contact Fitbit support to see whether there is a known issue with your device model.

Fitbit and Apple Watch cannot sync with each other

If you own both a Fitbit and an Apple Watch, they cannot share data with each other. Each device sends data only to its own ecosystem—Fitbit data goes to the Fitbit app and Apple Health, while Apple Watch data goes to Apple Health and the Fitness app. You will see both sets of data in Apple Health, but the two devices will not communicate or combine their measurements.

This means if you wear both devices on the same day, Apple Health will record steps and heart rate from both sources, which can lead to double-counting. If you want to avoid this, wear only one device at a time or turn off syncing for one of them.

Android users cannot sync Fitbit to Apple Health

Apple Health exists only on iPhone and iPad. If you use an Android phone, you cannot access Apple Health at all, and therefore cannot sync Fitbit data to it. Android users can sync Fitbit data to Google Fit instead, which is Google's health and fitness platform.

To sync Fitbit to Google Fit on Android, open the Fitbit app, go to Settings > Connected Apps, tap Google Fit, and follow the same permission steps. Google Fit works similarly to Apple Health—Fitbit data flows in automatically, and you can view all your measurements in one place.

Frequently Asked Questions

Does syncing Fitbit to Apple Health drain my battery?

No. The sync uses very little power because it happens in the background and only transfers data that your Fitbit has already collected. You will not notice any change in battery life on your iPhone or your Fitbit device.

Can I see my Fitbit data in the Apple Fitness app?

No. Fitbit data appears only in Apple Health, not in the Fitness app. The Fitness app shows data from your Apple Watch and workouts you log manually in the Fitness app itself. If you want to see all your activity in one place, use Apple Health instead.

What happens to my old Fitbit data when I sync?

Historical data from your Fitbit syncs to Apple Health as well. When you first turn on the connection, Apple Health will pull in data from the past 30 days (the exact window varies by Fitbit model). Data older than that stays in the Fitbit app but does not transfer to Apple Health.

Can I disconnect Fitbit from Apple Health without losing data?

Yes. Turning off the sync in the Fitbit app does not delete any data from either app. Your Fitbit data remains in the Fitbit app, and any data that already synced to Apple Health stays there. You can turn the sync back on at any time.

Does Apple Health show real-time data from my Fitbit?

No. Apple Health updates with Fitbit data every 15 to 30 minutes, not in real time. If you need to see your current heart rate or steps right now, open the Fitbit app instead.