# Circle of Fifths of 100+Scales

> Circle of Fifths and Circle of Fourths for 100+ Scales with Triad and 7th Chords

Canonical page: [https://chrome-stats.com/d/app.pg.circleoffifths](https://chrome-stats.com/d/app.pg.circleoffifths)

## Overview

- **ID:** `app.pg.circleoffifths`
- **Platform:** Android
- **Type:** Android app
- **Status:** Removed
- **Publisher:** PG App Studio
- **Category:** MUSIC\_AND\_AUDIO
- **Downloads:** 94,766
- **Rating:** 4.11 / 5 (231 ratings)
- **Version:** 3.3.3
- **Last updated:** 2025-12-02
- **First published:** 2023-01-23
- **Publisher country:** IN
- **Size:** 11 MB
- **Data as of:** 2026-07-16
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=app.pg.circleoffifths)
- **Website:** [https://www.pgappstudio.com](https://www.pgappstudio.com/)
- **Privacy policy:** [http://www.pgappstudio.com/p/privacy-policy.html](http://www.pgappstudio.com/p/privacy-policy.html)

## Description

The Circle of Fifths of 100+ Scales Chrome extension is a powerful music theory tool designed for both beginners and experienced musicians. It provides an interactive Circle of Fifths and Fourths for over 80 heptatonic scales, allowing users to explore chord progressions, modulations, and key mixing easily.

Key features include triad and 7th chord visualization, key selection with octave control, and the ability to rotate the wheel to set keys. The tool displays chords on piano, guitar, and staff views, enhancing learning and practice. It also incorporates an easy-to-use metronome with various instrument sounds and a speed-trainer to support rhythm development. The extension supports left and right-handed guitar settings, clockwise and anti-clockwise circle rotation, and separate volume controls. Its privacy-focused design ensures 100% user privacy. This extension is ideal for guitarists, pianists, and all musicians seeking to deepen their understanding of music theory in a practical, hands-on way.

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.WAKE_LOCK`
- `app.pg.circleoffifths.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.android.vending.BILLING`
- `com.google.android.c2dm.permission.RECEIVE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`

## Review summary

Users find the Circle of Fifths app extremely helpful for music theory and guitar learning, appreciating its detailed note display and customizable settings. However, multiple users report glitches such as freezing, blank settings screens, persistent ads despite VIP purchase, and intrusive spam tabs. Interface issues on certain platforms also affect usability. Overall, the app is valued but marred by technical and ad-related problems.

### Pros

- Very helpful for learning music theory
- Shows all the notes on the guitar
- Great tool for study and practice
- Best guitar learning tool many users have seen
- Allows setting fifths direction which helps learning

### Cons

- App freezes or glitches occasionally
- Settings screen often shows blank
- Ads remain after VIP purchase
- Spam tabs open in Chrome upon app launch
- App interface issues on some devices (e.g., large circle on Bluestack)

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Source: [Chrome-Stats](https://chrome-stats.com/d/app.pg.circleoffifths)