Music Theory Companion

Name: Music Theory Companion
Rating: 4.4 (2503 reviews)
Author: PG App Studio

By: PG App Studio

Music theory, scales, chords, ear training & songwriting tool for all musicians

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Features & Capabilities

Music Theory Companion is a comprehensive toolbox for musicians of all levels—songwriters, students, teachers, and performers. It offers 86 heptatonic scales and their diatonic triads/seventh chords, a 1,000+ chord library, circle of fifths visualizations, pitch detection, realistic piano keyboard and guitar fretboard displays, a configurable metronome, interval and ear-training exercises, and advanced voice-leading tools (Cube Dance). The app supports sharp and flat roots, shows compatible scales and chords, displays notation in treble and bass clefs, and provides analytical labels like Secondary Dominant and Secondary Leading-Tone.

Designed for practice, composition, and study, Music Theory Companion helps with improvisation, modulation, sight reading, vocal training and chord progression exploration. Its intuitive UI and continuously updated reference materials make it a practical music theory book and practice partner—ideal for pianists, guitarists, composers, exam students, and anyone wanting to improve relative pitch and musical understanding. Community support and resources are available via the developer website, Facebook page and YouTube channel.

User Growth & Download Statistics

App Music & Audio Education

By:

PG App Studio

Downloads:

658,031 1.91K

Rating:

4.40

(2,503) 1 new ratings

Version:

8.1.2 Last updated: 2026-05-06

Version code:

116

Creation date:

2018-05-23

Publisher country:

Permissions:

android.permission.RECORD_AUDIO Very high risk
com.google.android.gms.permission.AD_ID Moderate risk
android.permission.ACCESS_ADSERVICES_AD_ID Low risk
android.permission.ACCESS_ADSERVICES_ATTRIBUTION Low risk
android.permission.ACCESS_ADSERVICES_TOPICS Low risk
android.permission.FOREGROUND_SERVICE Low risk
android.permission.INTERNET Low risk
android.permission.POST_NOTIFICATIONS Low risk
android.permission.WAKE_LOCK Low risk
com.android.vending.BILLING Low risk

Size:

16.15MB

Email:

pg*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 83,699 ▲ 886

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

PG App Studio

Google Play Store

https://play.google.com/store/apps/details?id=app.pg.scalechordprogression

Email:

pg*****@gmail.com

Website:

https://www.pgappstudio.com

User Reviews

Music Theory Companion offers a free, offline, and feature-rich toolkit (circle of fifths, chords, a built-in keyboard with recording) that’s great for learning theory and practicing. However, reviews frequently cite intrusive ads, occasional audio malfunctions, and missing MIDI support, plus less-friendly long-form chord notation, which can hinder usability.

Pros

Free to use and available on Android
Comprehensive feature set (circle of fifths, chords, built-in keyboard with chords, recording)
Helpful for learning theory and practice (sight-reading, playing along with songs)
Realistic piano sound and playable keyboard
Offline access/usage

Cons

Intrusive, loud, full-screen ads that disrupt usage
Core audio issues (no sound or metronome silent)
Lack of MIDI connectivity support
Chord notation uses long-form symbols (e.g., Csus4##5) which can be cumbersome
Battery drain/energy usage

Recent reviews

Very good and handy to have. Particularly as a music student studying Jazz at the moment. Although I do wish there was more to access without VIP. But having the Circle of Fifths and a piano is helpful, especially for practise and quick transpositions (as an alto saxophone player). Overall, very good.