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BLE-Research-Group

BLE-Research-Group/MetaRadar

Android app that scans nearby Bluetooth Low Energy devices, analyzes their broadcast data, and alerts you to suspicious or following devices.

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What is it?

MetaRadar, presented as Bluetooth Radar, is an Android app for monitoring the Bluetooth Low Energy (BLE) devices around you. BLE devices such as headphones, fitness trackers and AirTags broadcast small packets that can contain persistent identifiers, which may allow someone nearby to track your presence over time.

The app scans and analyzes these broadcasts, uses flexible filters to surface particular devices, and estimates the approximate distance to each one. It can read data from available GATT services, includes a GATT services explorer, and infers device type from metadata. Users can configure alerts based on identifiers, device types or behaviors, such as a device moving with them over time. All processing happens offline, and the app states it does not share personal data or geolocation.

The project is intended for education, security research and personal investigation, and the authors say they do not endorse unlawful use.

Key features

  • 01Scans and analyzes Bluetooth Low Energy devices around you
  • 02Custom filters for the radar view
  • 03Alerts when a chosen device or fingerprint is nearby or moving with you
  • 04Reads data from available GATT services with a built-in services explorer
  • 05Infers device type from metadata and estimates distance
  • 06Runs offline without sharing personal data or geolocation

Use cases

  • Checking whether nearby wearables or accessories broadcast trackable identifiers
  • Security research into BLE privacy and device fingerprinting
  • Getting an early warning if an unknown device follows you over time
  • Exploring GATT services exposed by a Bluetooth device

Topics

#bluetooth#ble#android#security-tools#privacy#scanner#android-ble#radar#security-scanner

FAQ

What is MetaRadar?
Android app that scans nearby Bluetooth Low Energy devices, analyzes their broadcast data, and alerts you to suspicious or following devices. MetaRadar, presented as Bluetooth Radar, is an Android app for monitoring the Bluetooth Low Energy (BLE) devices around you. BLE devices such as headphones, fitness trackers and AirTags broadcast small packets that can contain persistent identifiers, which may allow someone nearby to track your presence over time.
Is MetaRadar free to use? What license does it have?
MetaRadar is open source under the GPL-3.0 license. Check the license terms before using it in commercial products.
Is MetaRadar still maintained?
No commits for 6+ months. The last commit to MetaRadar was on Jan 22, 2026.
What can I use MetaRadar for?
Checking whether nearby wearables or accessories broadcast trackable identifiers Security research into BLE privacy and device fingerprinting Getting an early warning if an unknown device follows you over time Exploring GATT services exposed by a Bluetooth device
Where can I get MetaRadar?
The source code and installation instructions are on GitHub: https://github.com/BLE-Research-Group/MetaRadar

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