SyncScale reads weight and body composition directly from supported Xiaomi scales and sends the measurement to Garmin Connect from your iPhone.
These are separate Xiaomi products with different Bluetooth protocols. SyncScale supports both and handles the correct connection method automatically.
Xiaomi's newer dual-frequency body composition scale. SyncScale detects its encrypted Bluetooth measurements after a one-time Xiaomi authorization.
Xiaomi's BIA body composition scale with Bluetooth 5.0. SyncScale reads its broadcast measurements directly, with no Xiaomi account required.
The app starts listening for your supported Xiaomi scale over Bluetooth.
Stand still and barefoot until the weight and impedance measurement is complete.
Review the result and upload it directly to your Garmin Connect account.
Available metrics depend on the scale and a completed barefoot impedance measurement.
Scale measurements are processed on your iPhone, not on SyncScale servers.
No advertising, analytics, or third-party tracking frameworks.
Authentication tokens are stored securely in the iOS Keychain.
Free to try. Garmin sync is available as a one-time purchase.
Download on the App StoreLast updated: May 27, 2026
SyncScale is designed with your privacy in mind. Scale readings are processed locally on your device and are not stored on SyncScale servers.
Bluetooth
The app uses Bluetooth to read measurements from supported scales. Weight and impedance are processed locally to calculate body composition metrics.
Accounts
Garmin Connect is used only when you choose to upload a measurement. The Xiaomi Body Composition Scale S400 requires a one-time Xiaomi authorization to retrieve its Bluetooth encryption key. Authentication data is stored in the iOS Keychain.
No analytics or tracking
SyncScale does not include analytics, advertising, or tracking frameworks.
For questions, issues, or feedback, contact info@scalesync.app.
Supported models:
Common issues: