Circle o Fifths: Guitar+Piano

Circle o Fifths: Guitar+Piano

Chords, Scales & Songwriting

1.1K ratings
58 reviews
$4.99

Details

Released
February 19, 2020
Updated
November 3, 2026

Features

Circle o Fifths: Guitar+Piano video #1 for iPhone
Circle o Fifths: Guitar+Piano screenshot #2 for iPhone
Circle o Fifths: Guitar+Piano screenshot #3 for iPhone
Circle o Fifths: Guitar+Piano screenshot #4 for iPhone
Circle o Fifths: Guitar+Piano screenshot #5 for iPhone
Circle o Fifths: Guitar+Piano screenshot #6 for iPhone
Circle o Fifths: Guitar+Piano screenshot #7 for iPhone
Circle o Fifths: Guitar+Piano screenshot #8 for iPhone
Circle o Fifths: Guitar+Piano screenshot #9 for iPhone
Circle o Fifths: Guitar+Piano screenshot #10 for iPhone
Circle o Fifths: Guitar+Piano screenshot #11 for iPhone
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About

Learn and practice music theory with an interactive circle of fifths. Explore major, minor, and diminished keys with audio recordings and guitar chord charts. Visualize chord relationships and transpose songs easily.

✓Interactive circle of fifths
✓Major, minor, and diminished keys
✓Audio recordings of chords
✓Guitar chord charts
✓Color-coded note/chord reference
✓Chords tab for key relationships
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What users say about Circle o Fifths

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+1

What's New in Circle o Fifths

3.0

November 3, 2026

Your practice tool just became a band. Write whole songs with verses, choruses and bridges, then add a drummer who never rushes. Head to Scales to jam over your own chords, or tap Solo and let the app improvise something new every time. Send a song to a friend as an audio file, and tap in your tempo instead of guessing it. Progressions got a tidy-up too: hold a chord to move or remove it, and the picker stays out of the way until you need it.

More

Events

Read more about A scale a week

A scale a week

Learn a new scale shape every week

Oct 13, 2026 — Nov 12, 2026

Read more about Build chord progressions

Build chord progressions

Loop chord progressions on piano or guitar

Jun 24, 2026 — Jul 21, 2026

Read more about Piano mode

Piano mode

Piano mode

Jun 23, 2026 — Jul 15, 2026

User reviews

Great

Love the numbers and colors. Plus changing instruments. To see how chords are made. I just bought this for a friend as well.

Super Helpful!

This app has been extremely helpful and insightful. Such good information. I have been able to use it so much when I need a quick chord progression. Highly recommend!!

Response from developer

#savlovesmusic So glad you are finding it helpful! -Tim

Major good timez

Top tier update. I learn music so easy. 5 star! Lets to move chords around for future. Folk and Rock patterns! Loistava!!!

Response from developer

aarthurVos Love that you love the update, and are finding it easy to learn music! -Tim

Nice Updates But,,,,

In the progressions tab an Emaj chord as it sounds on the app is played as a G# chord in standard tuning on guitar and a Bmaj chord as it sounds on the app is played as a D# chord on guitar in standard tuning. Other chords may also be set to higher pitches.

However, The piano chords in the progressions tab are the right pitch to play along with on a guitar in standard tuning.

Overall I think you are developing the app in good ways. simplicity is genius as they say as well as efficient!
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Response from developer

GSP 2026! Thank you for pointing that out! This has been fixed in version 2.2.1.

Excellent !

Rien à ajouter

Developer apps

User experience

🐞

Reported Bugs

3 issues

Viewport not dynamic, causing cut-off edges

Bug

No E# in the key of F#, should be F dim

Bug

B major chord sample sounding like Esus

Bug
✨

Requested Features

3 requests

Add more chord variations and voicings

Feature

Provide options for different instruments (e.g., ukulele)

Feature

Include major and minor pentatonic scales

Feature

FAQ

What is the Circle of Fifths: Music Theory app?

This app is a music theory tool designed to help users learn and practice the circle of fifths. It provides interactive elements, audio recordings, and guitar chord charts to understand key relationships and chord progressions.

What are the key features of this music theory app?

Key features include an interactive circle of fifths with three rings for major, minor, and diminished keys, 36 audio recordings of chords, guitar chord charts, color-coding for easy reference, and a dedicated chords tab for exploring key relationships.

Is the Circle of Fifths: Music Theory app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned in the provided description, suggesting a completely free experience.

Who would benefit from using this music theory app?

This app is ideal for musicians, songwriters, and music students who want to improve their understanding of music theory. It's particularly useful for learning chord relationships, practicing in different keys, and aiding in song composition.

How does the app help with learning guitar chords?

The app includes 36 guitar chord charts that can be accessed by tapping and holding on any note or chord within the circle of fifths. This allows users to see how to play each chord and learn its position on the guitar.