Circle of 5ths

Learn the Circle of Fifths. Compose your own music. Free and no ads. Enjoy it!

Anton Zhvakin · anton.zhvakin.circle_of_fifths

Not rated yet 100K+ downloads v2.1 27.3 MB Android 5.0+ PEGI 3 · Everyone

Download APK 27.3 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v2.1 (17)
Updated: Nov 18, 2025 (11 months ago)
APK size: 27.3 MB
Requires: Android 5.0+ (API 21)
CPU support: ARM 32-bit, ARM 64-bit
Category: Education (app)
Listed since: Mar 23, 2023 (at least)
Permissions: 1
Developer contact: [email protected]

About this APK

Circle of 5ths is an app by Anton Zhvakin in the Education category, listed since at least March 2023. It includes native code for ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

It asks for 1 permission, none of them sensitive. The app offers in-app purchases through Google Play.

What's new in v2.1

- fixed enharmonic change(there were different signs of alterations in a key at the same time); - fixed scale degree representation(I II III ... now are I ii iii ...); - fixed sounding chord(no inversions now).

Description

From the listing uploaded by “appupdater”.

The circle of fifths shows the relationship between major and minor parallel keys. Also it can be used for modulation from one key to another.

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Nov 18, 2025.
Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.

Store checks and file details

Developer signature verified Nov 18, 2025
Validated against Google Play Nov 18, 2025
Signed byCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
Signing certificate (SHA-1)E9:94:33:8F:D8:05:BD:8A:DE:A9:92:0F:F5:08:B8:4A:E5:38:CC:06
File MD575d2d24599b0b3f56dd7c7e53e3bde06
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 (1)

Circle of 5ths requests 1 permission, none of them sensitive.

In-app purchases (Google Play Billing) com.android.vending.BILLING

Required hardware & features

Basic touch input android.hardware.faketouch

Circle of 5ths 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 Circle of 5ths free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the Circle of 5ths 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 75d2d24599b0b3f56dd7c7e53e3bde06.