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Chronal

Clean metronome & tuner with polyrhythms and notation editor.
New in version 1.0.1
# v1.0.1

• Moved metronome to sample-based alignment
• Reworked and reorganized settings menu
• Added gesture customization for the metronome
• Added practice reminders and notification controls
• Increased BPM limit (500 → 800)
• Fixed rhythm buttons not updating
• Fixed metronome playing ticks for rests
• Added changelog popup
• Added Czech translation (Petr Kadlec @mormegil-cz)
• Added French translation (@Minos2020)
Chronal is a powerful, ad-free metronome and tuner built for musicians of all levels.

Practice, rehearse, and perform with precise timing, advanced rhythm tools, and a chromatic tuner, all in one app.

🎵 Metronome Features
• Notation editor: Hear the rhythm that you see on the page.
• Multiple synchronized metronomes: Layer independent rhythms for polyrhythms and advanced practice.
• Beat & subdivision visualization: Clear visual indicators for beats and subdivisions.
• Fullscreen mode: Focus on your music with large, easy-to-see visuals from a distance.
• Conductor mode: Follow a visual conducting path to internalize timing.
• Real-time BPM detection: Detect the tempo of percussion patterns straight from your microphone.

🎸 Tuner Features
• Transpose for any instrument: Tune guitar, strings, and wind instruments with precision.
• Custom tuning frequency: Adjust the reference pitch (A4) to any frequency you prefer.
• Tuner graph: Visualize your pitch stability and accuracy in real time.
• Reference tones: Generate reference tones to tune by ear.

🎷 No ads, no interruptions
Chronal is completely ad-free and distraction-free. Practice and perform without any distractions or annoying pop-ups. The app is completely open-source and is funded solely by generous donations.
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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.

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  • Version 1.0.1 (12) suggested Added on Feb 24, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by the original developer, 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.
    • 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.
    • Schedule precisely timed actions
      This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • dev.cognitivity.chronal.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 6.5 MiB PGP Signature | Build Log

    • New in version 1.0.0
    # v1.0.0

    • Fixed German note names (#10)
    • Fixed transpositions in expanded mode
    • Refreshed advanced editor UI
    • Updated colors for Material 3 Expressive
    • Increased touch size of tempo changer arrows
    • Improved expanded mode restrictions (#12 #13 #14)
    • Removed Clock Widget - may be reworked later
  • Version 1.0.0 (11) - Added on Dec 18, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by the original developer, 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.
    • 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.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • dev.cognitivity.chronal.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 5 MiB PGP Signature | Build Log

  • Version 0.3.0 (4) - Added on Sep 03, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by the original developer, 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.
    • 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.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • dev.cognitivity.chronal.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 15 MiB PGP Signature | Build Log

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