Octavian Pro is the Swiss Army knife of music theory apps! Featuring 550+ scales and 100+ chords, with deep options for viewing, listening, and cross-referencing, Octavian is the ultimate reference, learning, and teaching tool. Essential for all musicians, students, composers, and songwriters!

As seen in Keyboard Magazine (Jan 2010): "It's a cheat sheet no keyboardist should leave home without."

• SCALES - 550+ scales from around the world and through history. View any scale with any root note, in any mode, and examine the chords and harmony within the scale.

• CHORDS - 100+ chords including sevenths, elevenths, ninths, thirteenths. Invert chords and browse scales that include the chord.

• PROGRESSIONS - Compose 12-step chord progressions, with inversions, transposition, and added sevenths for each step.

• MODULATION - Find pivot chords for the current scale and discover possible modulation destinations for each scale degree.

• DICTIONARY - Enter notes on the keyboard to find the scales and chords that contain the notes!

• DISPLAY - Configure the note labels to show notes, intervals, degrees, steps, or solfège (iPad only).

• PLAYBACK - Choose tempo, octave, and repeat options for 12 high-quality instrument sounds to suit ear training, practice, or just hearing new harmonies.

A video tutorial is available at

What’s New

Version 3.1.0

• Modulation - Find pivot chords for the current scale
• "Ghost" scale notes when showing chords in Scales or Modulation
• Fix display issues with some buttons in Settings

Ratings and Reviews

5.0 out of 5
8 Ratings

8 Ratings

Coolwatercorey ,

Even Better sheesh!

I was so upset when I updated to iOS 11 and couldn’t use this app. :( I was wondering what the heck is taking them so long to update??, My apologies... I’m not even mad anymore. they were simply making things even better. Bravo Team! Freakin Bravo!

dontletmedrown ,

Love the new update

Glad to be able to use this app again. If you can make an option to have dictionary mode play individual note sounds as we touch/add them that would be handy. Thanks!

Billybudd128 ,


I can now upgrade to IOS 11. Was avoiding doing that solely for this app!


Scott Burgess
153.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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