Music Theory

Learn, hear, and practice music.

Music Theory helps you learn reading, rhythm, scales, intervals, chords, and harmony through interactive lessons and practice.

For iPhone and iPad with iOS 18 or later, and Mac with macOS 15 or later.

Explore notation alongside piano, violin, and guitar diagrams.
Hear piano examples and practice recognizing intervals and chords.
Choose drills, get answer feedback, and build mastery through spaced reviews.

Support

Questions, bug reports, or suggestions: hikerhauk@gmail.com.

For bugs, include your device, system version, app version, and steps to reproduce the problem.

Privacy policy

Your practice information

Your instrument preference and practice progress are saved on your device. Progress includes practiced questions, mastery levels, and review scheduling.

When available, Apple’s iCloud service privately syncs practice progress across your devices using the same Apple Account. Instrument preference is not included in this sync. Apple manages iCloud under Apple’s Privacy Policy. Lessons and practice also work offline.

No app tracking

The app has no separate account, advertising, analytics, or tracking, and does not send practice data to a server run by the developer. Audio uses bundled piano recordings; the app does not record your microphone.

Reset and support

Choose Practice → Reset progress and confirm to reset active practice progress. Resets sync through iCloud when available. Backup and recovery copies may remain.

If you email for support, the developer and email provider process your address and message, retaining correspondence as needed to respond and follow up. Email the same address for privacy questions.