Clean metronome & tuner with polyrhythms and notation editor.
About this app
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.
Licensed under CC0-1.0, by cognitivity.
What's New in v1.1.1
Imported from the F-Droid repository index.
- # v1.1.1
- • Improved note handling with the tuner.
- • Added an automatic stop when the tuner widget is inactive to prevent background drain.
- • Fixed various crashes in the advanced editor and tuner.
- • Added a warning dialog when the tuner fails to fetch audio.
Version history
May 10, 2026 · 9.4 MB · Android API 23–36 · code 14
Imported from the F-Droid repository index.
- # v1.1.1
- • Improved note handling with the tuner.
- • Added an automatic stop when the tuner widget is inactive to prevent background drain.
- • Fixed various crashes in the advanced editor and tuner.
- • Added a warning dialog when the tuner fails to fetch audio.
SHA-256 6058779c7ba0633c7eb3650d90da2a9fd457810013f5057633a4e8b75ec1a4ac
May 3, 2026 · 9.4 MB · Android API 23–36 · code 13
Imported from the F-Droid repository index.
- # v1.1.0
- • Added Metronome Tracks as a replacement for primary and secondary rhythms.
- ◦ Supports custom names, custom colors, infinite tracks, and more!
- • Added new display mode to metronome: Grid
- • Added fullscreen option for metronome displays
- • Redesigned layout for metronome UI
SHA-256 918e8b2f16c985dfc355a92895d620935a7b0d989cc176644fa993cf539958bf
Feb 24, 2026 · 6.5 MB · Android API 23–36 · code 12
Imported from the F-Droid repository index.
- # 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)
SHA-256 447cfc6f7f66f63ae37d5b22c4934886e8d44c608a0fc2ba127af352d255395b
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be dev.cognitivity.chronal is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.1.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Chronal first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Chronal, and a listing is removed when the evidence for it stops holding up.
Get Chronal
Every source we list for dev.cognitivity.chronal is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
6058779c7ba0633c7eb3650d90da2a9fd457810013f5057633a4e8b75ec1a4ac
Signing certificate
40272626d1860b44f38add838fead1945b6ffbcb95fba0b7d9559ed479234c1f
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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