Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Circle of Fifths, Opus 1 Screenshots

iPad

iPhone

About Circle of Fifths, Opus 1

A music theory tool for beginner musicians, Circle of Fifths, Opus 1 is a pocket reference for analyzing, transposing, and composing music. This app focuses on major and relative minor scales and chord progressions.

For a more advanced version of Circle of Fifths, check out our Circle of Fifths, Opus 2 edition. Opus 2 explores musical modes often used in jazz and a variety of other musical styles.

FEATURES
• Interactive circle: rotate it or tap on a key to see its scale and circle chord progression.
• Play scales and chords out loud by tapping on the staves.
• Tap on individual chords to explore chord patterns.
• Includes both chord name and roman numeral notation.
• Choose from treble, bass, or alto clef.

Circle of Fifths, Opus 1 was created by Lucius Kwok and Agnes Chan. Made in NYC.

What's New in the Latest Version 2019.12.5

Last updated on Dec 9, 2019

Old Versions

Moved the support FAQ to felttip.com/support/5ths-faq.html.

Version History

2019.12.5

Dec 9, 2019

Moved the support FAQ to felttip.com/support/5ths-faq.html.

2.4.5

Sep 18, 2019

Now supports Dark Mode.

2.4.4

Mar 14, 2018

Updated the layout to accommodate iPhone X design and to improve design of split view modes on the iPad.

2.4.3

Jun 28, 2017

• Updated the More Apps button.
• Bug fixes.

2.4.2

Sep 18, 2016

Added a link to the Musician’s Bundle, which includes our tuner app Tuna Pitch and the advanced Circle of Fifths, Opus 2.

2.4.1

Aug 22, 2016

Fixed a bug with the Help screen.

2.4

Aug 17, 2016

• By popular request, we've added chord name notation. Tap on a button to easily switch between roman numerals and chord names.
• Updated Help info in the app.
• Chords are now arranged in the common circle progression and with inversions.
• Updated the design of the circle to make it easier to interpret.

2.3

Sep 28, 2014

We added support for the 4.7" and 5.5" screens.

2.2

Jun 20, 2014

We added alto clef for violists!
We also improved the visual design.

2.1

Jun 6, 2014

• Removed the "Gift This App" button.
• Changed the font of the app.

2.0

Dec 10, 2013

Updated for iOS 7.
Added a Help section.