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Gecko

Time-travelling audio recorder — save what just happened
New in version 1.0.3
• Add donate heart flow and fix F-Droid RB workflow.
Gecko is a free, open-source time-travelling audio recorder for Android. It keeps a rolling in-memory buffer of microphone audio so you can save something that just happened, then optionally keep recording forward.

Features:
• Continuous listening into a ring buffer (foreground mic service)
• Save the last 1 / 5 / 30 minutes, 2 / 6 hours, or everything held
• Press-and-hold a duration chip to save history and keep recording
• Settings for RAM budget and sample rate (8 / 16 / 44.1 kHz)
• Exports WAV files to Music/Gecko via MediaStore
• Restarts listening after reboot if it was left on
• Multiple UI packs (Biolume, Sonar, Oxide, Volt)

Privacy:
• No ads, no analytics, no crash reporters
• Audio stays on-device; nothing is uploaded
• Microphone is used only while listening is enabled

Battery notes:
Defaults favour battery (8 kHz sample rate, power-saving mic mode, quiet notification). Raise sample rate in Settings when you need more fidelity.

Source: https://github.com/anantdark/Gecko
License: GPL-3.0-only
  • 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 1.0.3 (3) suggested Added on Oct 15, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 10 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "microphone"
      Allows the app to make use of foreground services with the type "microphone"
    • 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.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • com.anant.gecko.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3.6 MiB PGP Signature | Build Log

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