Chordio 4+

A companion tool for musicians

One In A Billion Ltd

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



Chordio is a powerful composition and music theory tool 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 write something new.

It comes with a selection of internal sounds so you can explore its features without recall to any other tools.

Play anything with a connected midi controller, and see the chord names on the Grand Staff in real-time.

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

The main features are divided into four workspaces:


• Build-in sequencer to create chord progressions.
• Create custom chords, edit existing chords, get chord inversions, and extended chords.
• Drag & Drop to change the song structure.
• Transpose the entire chord progression with a single tap.
• Create a playlist of custom chord progressions.
• A Chord Types & Vocings panel helps you generate new chords.
• Play-along with a backing rhythm track.
• Save/load songs, export it as MIDl.
• Download chord progressions from a growing collection of Chord Packs.

Modes & Scales

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


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


• MIDI keyboard support.
• Build progressions using the chord generators.
• Export MIDI to your DAW or sequencer.
• Custom chords, edit existing chords, get extended chords.
• Play internal sounds.
• Arpeggio, strum and performance modes.
• Mac version include a detachable resizable Keyboard View.
• Customise the Keyboard highlight colour.
• Select chord, to display a range of related scales and chords.
• Tap a note on the Grand Stave to highlight it with a color.
• Choose from selection of backing rhythms that fit specific genres.
• Chord Pattern playback

Always backup your chord progressions!

What’s New

Version 2.0

- Added Keyboard shortcut to loop chord sequence
- Bug fixes and 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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