Circle of Fifths, Opus 2
Advanced music theory - modes
Archived App (Last seen on 25 Jul 2025)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Explore advanced music theory, focusing on modes and jazz improvisation. This tool offers an interactive circle to visualize relationships between keys and chords, with options to play progressions aloud and view notation.
What's New in Circle of Fifths, Opus 2
2019.12.5
December 9, 2019
Moved the support FAQ to felttip.com/support/5ths-faq.html.
Developer apps
FAQ
What is Circle of Fifths, Opus 2?
Circle of Fifths, Opus 2 is a music theory application designed for musicians to explore advanced concepts like musical modes and jazz improvisation. It features an interactive circle to visualize key and chord relationships.
What are the key features of Circle of Fifths, Opus 2?
Key features include an interactive circle that can be rotated, the ability to switch between scale and chord progressions, playing these progressions aloud, exploring individual chord patterns, and displaying chord names with roman numeral notation. It also supports treble, bass, and alto clefs.
What is the price of Circle of Fifths, Opus 2?
Circle of Fifths, Opus 2 is available for a one-time purchase of $4.99. There are no in-app purchases or advertisements associated with this application.
What devices is Circle of Fifths, Opus 2 compatible with?
Circle of Fifths, Opus 2 is compatible with iPhone, iPad, and iPod devices. It requires iOS 10.0 or later.
How often is Circle of Fifths, Opus 2 updated?
The latest version of Circle of Fifths, Opus 2 was released on December 9, 2019. While the app was last updated in late 2019, it remains a stable tool for music theory exploration.
What is the age rating for Circle of Fifths, Opus 2?
Circle of Fifths, Opus 2 has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.
Does Circle of Fifths, Opus 2 have ads?
No, Circle of Fifths, Opus 2 does not contain any advertisements. It is a paid application that offers an ad-free experience.
How does Circle of Fifths, Opus 2 compare to Opus 1?
Circle of Fifths, Opus 2 is an advanced version focused on modes and jazz. Its predecessor, Circle of Fifths, Opus 1, is a beginner-friendly edition that explores major keys and relative minor keys.
