Chord ProTrainer

iPhone / Musique

Master the Circle of Fifths so you can improvise with confidence and recall chord relationships instantly.
Practice with interactive challenges and build lasting fluency through short, focused sessions you can repeat anytime.

Two ways to train:
Key mode - Identify keys by their position on the circle.
Numeral mode - Identify keys by scale degree using Roman numerals.

Earn stars as you improve, stay motivated with a clear progression, 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.