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- Circle of Fifths • Pro

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- Ear Training • Pro

- Scales • Pro Trainer

Circle of Fifths • Pro

Circle of Fifths • Pro is a powerful, musician‑first tool for understanding keys, harmony, modes, and chord relationships. Built with a clean interface and a modern theory engine, it helps musicians visualise and explore the structure of Western music with clarity and confidence.

Features

  • Interactive Circle of Fifths with major and minor keys.
  • Mode Explorer: Ionian to Locrian with scale tones and patterns.
  • Chord Families: tonic, subdominant, dominant, and modal interchange.
  • Key Signature breakdowns with accidentals and relative keys.
  • Diatonic chord mapping for every key.
  • Clean, minimal interface designed for learning and exploration.
  • All theory processing happens locally on your device.
  • No ads, no tracking, no data collection.

Designed for Musicians

Circle of Fifths • Pro is crafted to support real musical understanding. Whether you're learning harmony, composing, improvising, or teaching, the app presents theory in a way that feels intuitive and visually clear. Every interaction is designed to help you connect concepts and build confidence.

Privacy & Trust

Circle of Fifths • Pro collects no personal data. For full details, see the Circle of Fifths • Pro Privacy Policy.

Availability

Circle of Fifths • Pro is available now on the Apple App Store for iPhone and iPad.

Download on the App Store