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Sentinel Lens

Facial recognition surveillance with alerts
Sentinel Lens is a facial recognition surveillance app that uses your Android device's camera to record video in the background (with no live preview) and sends Telegram alerts when unauthorized individuals are detected, based on a configurable blacklist and whitelist.

Key Features

Background Recording

  • Discreet Capture: Record video silently in the background without any visible camera preview.

  • Saved Camera Footage: Automatically store recordings for later review.

  • Front or Back Camera: Choose either camera lens for optimal coverage.



Advanced Facial Recognition

  • Facial Recognition Surveillance: Analyze recorded frames to identify known and unknown faces.

  • Configurable Watchlist: Maintain custom blacklist and whitelist entries to control alerts.



Real-Time Alerts

  • Telegram Alert Integration: Send instant notifications via Telegram when a watchlist match is detected.



  • app screenshot
  • app screenshot
  • app screenshot
  • app screenshot

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.0.1 (2) suggested Added on May 02, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 11 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "camera"
      Allows the app to make use of foreground services with the type "camera"
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.fpf.sentinellens.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 96 MiB PGP Signature | Build Log

  • Version 1.0.0 (1) - Added on Apr 22, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 11 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "camera"
      Allows the app to make use of foreground services with the type "camera"
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.fpf.sentinellens.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 96 MiB PGP Signature | Build Log

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