Chordio 4+

A companion tool for musicians

One In A Billion Ltd

    • 5.0 • 1 Rating
    • $8.99
    • Offers In-App Purchases



Chordio is an inspirational and powerful music theory app that makes finding chords and scales fun to learn. You can catalog all your unique chord voicings and progressions in one place. This is an essential tool for modern music producers, composers, and teachers.

Expand your music theory, and coming up with fresh and innovative chord progressions when you want to write something new.

Play anything with a connected midi controller, and see the chord names and the manuscript notation in real-time.

Musicians can solo over a chord progression using the built-in sounds and chord progressions can be re-arranged or transposed on the fly.

The main features are divided into four workspaces:


• Quickly build progressions in the sequencer.
• Drag & Drop to change the song structure.
• Quickly Transpose the entire chord progression.
• Create multiple editable playlists of chord progressions.
• Chord Types panel helps you generate new chords.

Modes & Scales

• Interactive way to learn what scales are associated with each mode.


• Learn to play songs at your own pace.
• Download from a growing collection of Lesson Packs .
• Lessons can be slowed down or pitch changed.


• Export MIDI to your DAW simply by dragging and dropping
• Browse chord variations to get extended chords.
• Built-in Instruments.
• Select chord, to display a range of related scales and chords.
• Tap to manuscript note to highlight on the music stave.
• Choose from a selection of backing rhythms that fit specific genres.

Always backup your chord progressions!

What’s New

Version 1.2

- Right click a chord cell to edit or delete
- Bug Fixes & Performance Improvements

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

adonalmao ,


Wow, this really ties together so many aspects of learning the piano. Recognizes chords, displays notes on the staff, and includes various chord progression libraries, with some great ones for jazz! There's a few bugs, but at this early stage that's to be expected.

Looking forward to further development on this one! One of the best out there!

App Privacy

The developer, One In A Billion Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

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