ScaleLauncher

ScaleLauncher

Use Xiaomi S400 locally via Bluetooth with openScale and Health Connect

1260er Sports & Health

Download (13 MB)

Screenshots

Screenshot of ScaleLauncher Screenshot of ScaleLauncher

Description

ScaleLauncher connects Android devices directly to the Xiaomi Body Composition Scale S400 over Bluetooth and processes measurements locally.

The app authenticates using the scale login token, receives complete measurement data and assigns measurements to the appropriate user based on configurable weight ranges. Results can be stored directly in openScale. Selected values can optionally also be written to Health Connect.

Multiple paired ScaleLauncher devices can exchange household profiles and measurement decisions over encrypted Bluetooth. This allows measurements to be assigned to a user whose profile belongs to another paired device.

ScaleLauncher does not require Xiaomi Cloud for normal operation and has no Internet permission.

Features:
• direct Bluetooth connection to the Xiaomi S400
• local body-composition calculation
• automatic and manual user assignment
• openScale integration
• optional Health Connect integration
• encrypted communication between paired ScaleLauncher devices
• no advertising or tracking

ScaleLauncher is free and open-source software licensed under the GNU General Public License v3.0 only.

Versions

Version Date Size Requires Android Download
1.7.0 current
e90cda7c53b458f4…
 2026-10-05 13 MB API 31

Permissions

What the app asks the system for. Android only grants sensitive access after you confirm it.

  • Bluetooth scanSearch for nearby Bluetooth devices.
  • Bluetooth connectionConnect to paired Bluetooth devices.
  • BLUETOOTH_ADVERTISE
  • NotificationsShow notifications.
  • Foreground serviceKeep running in the background, visible in the status bar.
  • FOREGROUND_SERVICE_CONNECTED_DEVICE
  • Run at startupStart automatically after the device is switched on.
  • REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
Show 11 more permissions
  • health.WRITE_WEIGHT
  • health.WRITE_HEIGHT
  • health.WRITE_BODY_FAT
  • health.WRITE_BODY_WATER_MASS
  • health.WRITE_BONE_MASS
  • health.WRITE_LEAN_BODY_MASS
  • health.WRITE_BASAL_METABOLIC_RATE
  • openscale.READ_WRITE_DATA
  • oss.READ_WRITE_DATA
  • beta.READ_WRITE_DATA
  • debug.READ_WRITE_DATA

Comments