Music Theory Companion

583K installs
2.4K ratings
31.8K monthly active users
$<10K monthly revenue est.
IAP 36% · Ad 64%
Install Trends
Weekly +1.5K
Declining
Monthly +8.8K
Steady

Music Theory Companion Summary

Music Theory Companion is a ad-supported, with in-app purchases Android app in Music And Audio by PG App Studio. Released in May 2018 (7 years ago). It has about 583K+ installs and 2.4K ratings with a 4.46★ (good) average. Based on AppGoblin estimates, it reaches roughly 31.8K monthly active users and generates around $<10K monthly revenue (36% IAP / 64% ads). Store metadata: updated Jan 14, 2026.

Recent activity: 1.5K installs this week (8.8K over 4 weeks) showing below average growth , and 2.00 new ratings this week View trends →

Store info: Last updated on Google Play on Jan 14, 2026 .


4.46★

Ratings: 2.4K

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Screenshots

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App Description

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

Unlock your musical potential with the Music Theory Companion app! This comprehensive tool is designed for musicians of all levels, from beginners to experienced composers. Whether you're into songwriting, music theory study, or want to improve your playing, this app is a goldmine. This app helps you develop your aural skills and relative pitch. It can help with improvisation, composition, arrangement, and interpretation.


🌟 KEY FEATURES:
✅ Scales & Chords: Explore 86 unique heptatonic scales/modes and their diatonic triads/seventh-chord formations. The app has a wide list of scales for guitar, piano and vocal.
✅ Matching Chords: Discover alternative chords for any note in any scale.
✅ Matching Scales: Find alternative scales that can be played with any given scale.
✅ Circle of Fifths: Visualize the circle of fifths for all 86 scales, with options for triads and seventh chords. The circle of fifths tool can be used for finding chord progressions. The app supports both clockwise and anticlockwise directions for the circle of fifths.
✅ Voice Leading: Use the Cube Dance tool for voice leading guidance based on Neo-Riemannian theory.
✅ Chord Library Access a library of 1000+ chords, with chord construction details. This can be used as a chord finder.
✅ Modulations: Explore various chord progression options for smooth key changes.
✅ Scale Practice: Use the pitch detector to practice scales on guitar, piano, or vocals. This app can also be used for vocal training and helps with ear tuning.
✅ Intervals: Train your ear with interval exercises in all keys.
✅ Metronome: Practice with a highly accurate metronome that has configurable sounds. The metronome can be used with guitar, drum set, piano, and vocal practices.
✅ Piano: A realistic piano keyboard with different instrument sounds. This can be used as a piano chords learning app.
✅ Guitar Fretboard: Realistic left-handed and right-handed guitar fretboard display. The app is also a guitar chords app.
✅ Musical Symbols: Quick online reference for musical symbols.
✅ Music Theory Reference: Access a vast collection of online music theory resources, making it a great free music theory book.
✅ Supports both sharp (#) and flat (b) notes for root.
✅ Play guitar chords or piano chords in sync with the metronome ticks.
✅ Has a simple and easy-to-use user interface.
✅ Provides analytical labels such as Secondary Dominant and Secondary Leading-Tone.
✅ Shows compatible scales' chords.
✅ Displays similar and relative scales.
✅ Shows common degrees: Tonic, Supertonic, Mediant, Subdominant, Dominant, Submediant, Leading tone (in Major scale) / Subtonic (in Natural Minor Scale)
✅ Displays compatible chords' scales.
✅ Shows chords and scales on the staff with treble and bass clef.


🎯 APP USAGE:
This app is a complete toolbox for musicians and can be used for:
✅ Music Composing
✅ Music Theory Study
✅ Chord Progressions
✅ Modulation and Key Change
✅ Voice Leading
✅ Guitar and Piano Chord Practice
✅ Vocal Training
✅ Ear Training
✅ Sight reading

🎼 Designed for:
🎹 Pianists & keyboard players
🎶 Musicians, composers, and songwriters
🧠 Music theory learners & teachers
🎓 Students preparing for music exams
🎧 Anyone who loves creating music

The Music Theory Companion app has a realistic piano keyboard and guitar fretboard. It also has a pitch detector.
This app is continuously updated and improved.


COMMUNITY

Follow us on Facebook
https://www.facebook.com/MusicCompanionApp/

Join Our Facebook Group
https://www.facebook.com/groups/MusicCompanionGroup/

Visit Our Website
https://www.pgappstudio.com

Check our YouTube Channel
https://www.youtube.com/@PGAppStudio

Contact Customer Support
pgappstudio@gmail.com