Music Theory Companion

Contains adsIn-app purchases
4,5
2,22K reviews
100K+
Downloads
Content rating
PEGI 3
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About this app

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
[email protected]
Updated on
26 May 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4,5
2,11K reviews
Chris Nusbaum
02 March 2025
Great app! It's so useful to have a collection of tools like this in one place. I really like the ability to flip between viewing notes/chords on a staff, piano, and guitar fretboard. And as a lefty, being able to flip the guitar fretboard around is super helpful. One thing that would make it even better is to somehow integrate chord inversions and different chord voicings, w/ ability to hear & see them visually represented on staff/piano/fretboard. I'll add a plus to my 5* for that 😄.
13 people found this review helpful
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PG App Studio
16 March 2025
Thank you for your amazing 5-star review! Chord inversions and different voicings with visual/audio representation is in our future roadmap. If you have more ideas, please reach out at [email protected]. Enjoy making music! Please recommend the app to your musician friends. Thanks.
Mikael A Ketsela
18 April 2025
I have no clue what I am doing yet this app is very useful to understand concepts and YouTube lessons on my own. I can see how this (the free version) can be an invaluable tool to anyone dabbling especially with some background of music theory.
5 people found this review helpful
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PG App Studio
07 May 2025
Thank you for the thoughtful 5-star review! We're glad Music Theory Companion is helping you make sense of music theory and YouTube lessons. It’s great for learners at any level! Feel free to share it with your musician friends and email us at [email protected] for ideas or feedback!
Caleb Chidiebere
09 April 2025
This app is very goooddd!!! like i love it. many tools compressed in one app. Every choir master should download this app. Am giving you guys 5 stars.
Did you find this helpful?
PG App Studio
07 May 2025
Thank you for the awesome 5-star review! We're glad you're loving the tools packed into Music Theory Companion. Your support means a lot! Please do share it with fellow choir masters and musicians. For suggestions or feature ideas, reach us anytime at [email protected].

What's new

✔ Piano - added metronome
✔ Piano - added recording and playback
✔ Metronome - Improved user interface
✔ Fixed few bugs