Keyculator

Music theory with a twist!

Rotate Keyculator to view notes, scales, chords, and chord progressions in every major and minor key! Or, tap "Surprise Me" for a random selection - great for playing immediately, or some randomized practice sessions.

Keyculator is derived from the "circle of fifths" in music theory, which has a great structure for representing the relationship of notes in a given key, as well helping to understand intervals and chord construction.

I created Keyculator as a physical device for myself to try to better understand these patterns, and to build a more intuitive understanding of music theory. In the process I've found this little tool incredibly helpful for composing music, and as a software developer by profession I thought I might be able to share it with all of you in case anyone else may find it as useful as I have.

Thanks for reading, and best of luck on your musical journey!

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If you have any comments, I personally read anything submitted in the "feedback" box in-app and would love to hear from you.

I'm far from any kind of expert in music theory and will keep improving Keyculator for years to come, if there are ways to make it even better!

If you like the Keyculator app, consider visiting https://keyculator.com to get one hand-made. Regardless though, Keyculator will always be available here!