Musical instrument pitch tuning
About this app
Accordion tuner with scope, spectrum and strobe or staff. Can show up to eight different notes or reeds concurrently.
In portrait the app shows a scope with the input signal, a spectrum showing the processed signal, the main display with the note value, cents error, frequency error etc, a strobe or staff display and a meter display showing the cents error. In landscape the app shows just the main display or staff and the meter. There is a signal indicator in the action bar which is useful in landscape mode.
* 32 temperaments including Equal, Just, Pythagorean, Meantone * Filter options, including low pass, fundamental, note and octave filter * Optional strobe or musical staff display * Custom temperaments option * Transposition option * Solfège (DoRéMi) option
Licensed under GPL-3.0-only, by Bill Farmer.
What's New in v1.58
Imported from the F-Droid repository index.
- * Use executor for background tasks
- * Update SDK, build tools
Version history
Mar 27, 2026 · 0.2 MB · Android API 23–35 · code 158
Imported from the F-Droid repository index.
- * Use executor for background tasks
- * Update SDK, build tools
SHA-256 7fbfaee87f3402f7c4b269ac42a36a2ff2c91b382655647efad23d631caff944
Jan 25, 2026 · 0.2 MB · Android API 23–31 · code 157
Imported from the F-Droid repository index.
- * Add load custom temperaments
SHA-256 844f32c237cdd0305ae0e683427ed8d6d2e3cbe403b3599389dbb738edc22856
May 20, 2024 · 0.2 MB · Android API 23–28 · code 156
Imported from the F-Droid repository index.
- Update audio record
- Update Chinese translation
SHA-256 a415f5bc00065dc8817e434f7ac28a9a9898b03fe2f23bb97969700e90d26721
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- 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 org.billthefarmer.tuner 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, 1.57 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Tuner 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 Tuner, and a listing is removed when the evidence for it stops holding up.
Get Tuner
Every source we list for org.billthefarmer.tuner 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
7fbfaee87f3402f7c4b269ac42a36a2ff2c91b382655647efad23d631caff944
Signing certificate
f551947f71f12769fe27db76d39f919ab3e93477cfee4a0aac80d0fd9e606f22
Permissions Required
What each permission lets Tuner do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
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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