Instrument Tuner

Instrument Tuner is a portable chromatic tuner for Android devices.

Gebauer Matthias · instrument.tuner

Not rated yet 500K+ downloads v2.00 2.6 MB Android 5.0+ PEGI 3 · Everyone

Download APK 2.6 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v2.00 (21)
Updated: Sep 2, 2026 (1 month ago)
APK size: 2.6 MB
Requires: Android 5.0+ (API 21)
CPU support: Any (no native code)
Category: Music & Audio (app)
Listed since: Jul 13, 2021 (at least)
Permissions: 3 (1 sensitive)
Website: gebauer-matthias.de
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Instrument Tuner is an app by Gebauer Matthias in the Music & Audio category, listed since at least July 2021. It has no native code, so it runs on any Android processor.

Since version 1.90, the APK grew from 2 MB to 2.6 MB and the minimum Android version rose from 4.0 to 5.0. It asks for 3 permissions, 1 of them sensitive: record audio. It asks for the same permissions as version 1.91.

What's new in v2.00

- Tempering: User-Defined Tempering [Pro Version] - Bugfixes: Android Dark Mode, Adjust Concert Pitch Frequency - Android 16 Support

Description

From the listing uploaded by “appupdater”.

Instrument Tuner turns your android mobile phone into a portable chromatic tuner. It will let you tune any musical instrument with a very high accurateness (up to ±1/100 semitone (±1 cent) precise) and a wide range that covers A0 (27.50 Hz) – C8 (4186.01 Hz). Features: - Wide Detection Range from A0-C8 - Tone Generator (optimized sound generator, to generate tones in the full range of A0 up to C8) - Tuning Modes for specific instruments - Special Tuning Features Instrument Tuning Modes: - Chromatic Tuner (Tuning instruments in the full range of A0 up to C8) - Guitar Tuner - Violin Tuner - Viola Tuner - Violoncello Tuner - Bass Tuner (4 Strings and 5 Strings) - Ukulele Special Tuning Features: - Orchestra Tuning (shift/redefine the concert A Pitch) - [Pro] Tempering Modes (e.g. Equal Tempering, Kirnberg3, Werckmeister3, Meantone) - [Pro] Stretching 4 Modes (Allows the user the tuning of pianos)

Version history

3 versions are listed, going back to v1.90. Since v2.00 it requires Android 5.0+.

v2.00 LATEST Sep 2, 2026 2.6 MB TRUSTED v1.91 Aug 23, 2026 2 MB TRUSTED v1.90 Aug 30, 2024 2 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 2, 2026.
Certificate issued to “Matthias Gebauer” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Sep 2, 2026
Validated against Google Play Sep 2, 2026
Signed byCN=Matthias Gebauer
Signing certificate (SHA-1)DC:FE:E5:B8:AF:5A:AD:12:17:C9:07:5F:5F:73:76:B7:8C:2E:3B:66
File MD56d5f0066dcbc61ea78df61daf1c138a7
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (3)

Instrument Tuner requests 3 permissions, 1 of them sensitive.

Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
Internal broadcast protection (app-defined) instrument.tuner.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK

Required hardware & features

Basic touch input android.hardware.faketouch
Microphone android.hardware.microphone

Instrument Tuner APK: questions and answers

Is there a version of Instrument Tuner for older Android phones?

The current version needs Android 5.0 or later. Version 1.91 is the newest listed build that installs on Android 4.0 and later. Get version 1.91 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Instrument Tuner APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 6d5f0066dcbc61ea78df61daf1c138a7.