Chord ProTrainer
Master the Circle of Fifths
Only for iPhone
$9.99
iPhone
Master the Circle of Fifths so you can improvise with confidence and recognize chord relationships instantly.
Practice in short, focused sessions with an intuitive flashcard system featuring 3 levels of difficulty …
Basic Mode:
Learn where every key sits on the Circle of Fifths
(dominants, subdominants, and relative keys)
Advanced Mode:
Identify chords by scale degree using Roman numerals
(I–ii–iii–IV–V–vi–vii°)
Expert Mode:
Learn to create interesting chord progressions using
- Secondary dominants
- Borrowed chords
- ii–V progressions
- Tritone substitutions
- Diminished chords
- V alternatives
Earn stars as you improve, stay motivated with a clear sense of progress, and review detailed statistics to see how far you’ve come.
When you want a real test, turn on Hard Mode for a tougher challenge.
Featuring English and German notation
(In German notation, B is written as H, and Bb as B.)
No in-app purchases or microtransactions!
It's never been so easy to build chord fluency :)
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's new in Version 1.3
- Expert Mode to build more interesting Chord progressions
- Explanations for each Challenge
- Enhanced Statistics
- UI Improvements
- Bug fixes
The developer, THILO ANSELM VOISSEL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- THILO ANSELM VOISSEL
- Size
- 2.3 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Thilo Voissel
