If you own a Fitbit and an iPhone, you’ve probably already noticed the problem: there is no native connection between Fitbit and Apple Health. Despite Google’s acquisition of Fitbit in 2021, this integration still doesn’t exist as of early 2026. Your Fitbit data stays locked inside the Fitbit app unless you use a third-party bridge app to move it across.
Here’s how to set one up and what to expect.
How Do You Set Up a Fitbit-to-Apple-Health Bridge?
Google has chosen to invest in Health Connect (Android’s health data platform) rather than building an Apple Health integration. Fitbit natively syncs to Health Connect on Android phones, but on iPhone, the Fitbit app has no option to write data to Apple Health — not even a hidden setting. Every Fitbit-to-Apple-Health connection requires a third-party app that reads from Fitbit’s servers and writes the data to Apple Health.
The most reliable bridge apps include SyncFit, Sync Solver, and Fitbit to Health App Sync by Zama Labs. Here’s the general setup process:
Step 1: Download your chosen bridge app from the App Store. SyncFit and Zama Labs both offer subscription pricing; Sync Solver has previously offered one-time purchase options.
Step 2: Open the bridge app and sign in with your Google Account (Fitbit accounts have been migrated to Google accounts as of 2025). Grant the app permission to read your Fitbit data through the Fitbit API.
Step 3: When prompted, grant the bridge app write access to Apple Health. Enable all available data categories — steps, heart rate, sleep, workouts, weight, and any others offered.
Step 4: Configure sync frequency. Most bridge apps offer manual sync (you tap a button), scheduled sync (hourly or daily), and background sync. Background sync is the most convenient but least reliable on iOS due to Apple’s restrictions on background processing.
Step 5: Perform an initial sync. Depending on the app, you may be able to import historical Fitbit data going back weeks or months.
What Fitbit Data Can You Get Into Apple Health?
The data coverage varies by bridge app, but the best options (SyncFit, Zama Labs) can transfer: steps, heart rate, resting heart rate, sleep duration and stages (REM, Deep, Light, Wake), SpO₂, breathing rate, workouts, weight, body fat percentage, and active calories.
However, there are universal limitations. Fitbit’s API provides daily summary data, not minute-by-minute granularity for most metrics. Heart rate data may arrive as periodic samples rather than continuous streams. HRV data cannot translate between platforms because Fitbit uses RMSSD while Apple Health stores SDNN — a fundamental measurement difference that bridge apps can’t reconcile.
Data that no bridge app can transfer: Active Zone Minutes, Daily Readiness Score, stress management score, ECG recordings, and Fitbit’s proprietary coaching recommendations.
For ScoreVitals users, a bridge app provides enough data for meaningful session scoring if workout heart rate transfers. Sleep analysis works if your bridge app supports sleep stage data. However, the recovery pillar will be limited without reliable HRV data reaching Apple Health.
What Should You Watch Out For?
Bridge apps can break. These apps depend on Fitbit’s API, which Google controls. API changes, rate limits, or authentication updates can temporarily or permanently disrupt sync. Check app reviews and update history before committing to a subscription.
Background sync is inconsistent. iOS limits how often third-party apps can run in the background. You’ll get the most reliable results by opening the bridge app once daily and triggering a manual sync.
Account migration matters. Fitbit required all users to migrate to Google accounts by February 2026. If you haven’t migrated, your Fitbit data may be at risk. Make sure your bridge app is connected through your Google credentials, not legacy Fitbit login.
If your Fitbit data matters to you, a bridge app is the only path to Apple Health today. Once data flows through, ScoreVitals can use it to calculate your daily readiness score — though an Apple Watch or Garmin will always provide a more complete data stream.