TunerTime

A tool for visualizing sound that can be used to tune pianos.

galexand · org.galexander.tunertime

Not rated yet 10K+ downloads v17.0 1.3 MB Android 4.1+ PEGI 3 · Everyone

Download APK 1.3 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v17.0 (17)
Updated: Nov 25, 2025 (10 months ago)
APK size: 1.3 MB
Requires: Android 4.1+ (API 16)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Music & Audio (app)
Listed since: Mar 23, 2023 (at least)
Permissions: 2 (1 sensitive)
Website: galexander.org/software/tunertime
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

TunerTime is an app by galexand in the Music & Audio category, listed since at least March 2023. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

It asks for 2 permissions, 1 of them sensitive: record audio.

What's new in v17.0

2020/12/27 Version 17: Fix microphone permission on new installs.

Description

From the listing uploaded by “appupdater”.

Two tools for visualizing sound. A stroboscopic tuner. You tell it which note you are aiming for, and then it will show you a red/green bar indicating how close you are coming to hitting it. Perfectly horizontal means you are in tune, sloping down is flat, and sloping up is sharp. An FFT spectrum analyzer. You can see how the complete spectrum evolves over time. TunerTime is not the simplest tuner to use, but it is probably the most precise, and it has features particularly useful for piano tuners. Have questions? The manual is at http://www.galexander.org/software/tunertime/

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Nov 25, 2025.
Certificate issued to “Unknown” This is the certificate of the Google Play version.

Store checks and file details

Developer signature verified Nov 25, 2025
Validated against Google Play Nov 25, 2025
Signed byCN=Greg Alexander, OU=Unknown, O=Unknown, L=Unknown, ST=Unknown, C=us
Signing certificate (SHA-1)9A:3D:C4:68:D4:C2:31:45:AB:BF:F2:06:14:81:CD:C5:71:69:6F:84
File MD54b46b3d3511e0b9aa173dcee0b4df4bb
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. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (2)

TunerTime requests 2 permissions, 1 of them sensitive.

Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
Prevent the device from sleeping android.permission.WAKE_LOCK

Required hardware & features

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

TunerTime APK: questions and answers

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 TunerTime 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. After downloading, check that the file's MD5 is 4b46b3d3511e0b9aa173dcee0b4df4bb.