Is Clavier Tuner safe?

Clavier Tuner is a piano tuning app made by a piano tuner — free, open source, and built on one idea: the only truth about a string is a measurement of that string. MEASURE FIRST Strike a handful of keys with the other strings muted. From those strings the app measures the inharmonicity of your piano and works out where every note belongs, before you tune the first one. The stretch comes from thi…

Developer: clavierhaus
Category: Music Practice Tool
Earliest archived version: 16 Oct 2026
License: Apache-2.0 (per F-Droid metadata)

02 / Release notes

Release notes from F-Droid

16 Oct 2026

0.1.1

The sampling's inharmonicity now holds for the whole tuning: a note tuned later never moves the target of one already tuned, so sample ten to fifteen strings at the transitions. The bells stay inside their panel.

Full notes →

03 / Package identity

Technical fingerprint

Application IDat.clavierhaus.claviertuner

Latest APK SHA-256a3f9fad5a80a5fd7a25528bd4ab52bb37dd80caf94c70ffe83094a7f6830e1bd

Signing certificate36:7C:17:E5:71:96:74:D6:C5:05:11:B6:E4:1D:E8:02:6C:F7:62:A6:3D:06:5E:D0:03:77:52:85:33:3A:B5:E3

MIN ANDROID26TARGET37ARCHITECTUREarm64-v8a · armeabi-v7a · x86 · x86_64

04 / Version archive

Documented releases

1 TOTAL

VersionReleasedAndroidArchitecture

0.1.116 Oct 202626+arm64-v8a, armeabi-v7a, x86, x86_64→

05 / Safety & access

Safety verdict

Authentic — file hash matches the source indexNo ads or tracking flagged by the source

IntegritySHA-256 verified vs source

SourceOpen-source · fdroid

Permissions2 declared · 1 sensitive

Signaturepresent

Anti-featuresNo known anti-features

Sensitive accessRECORD_AUDIO

Declared permissions

android.permission.RECORD_AUDIO at.clavierhaus.claviertuner.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Tracker status: Not assessed by WIKI for Android.

06 / Sources

Evidence ledger

Each entry is a captured public reference backing this record.

RepositorySource package page↗Source codeSource repository↗