Chordio: compose & learn music 4+

A companion tool for musicians

One In A Billion Ltd

    • 4.8 • 6 Ratings
    • Free
    • Offers In-App Purchases



Looking for a spark for your upcoming song?

Introducing Chordio, a powerful tool for composition and music theory that offers an enjoyable and interactive experience. This app allows you to explore chords and scales in a fun and engaging way. It also provides a convenient platform for storing all your distinctive musical chord progressions in a single location. As a result, Chordio becomes an indispensable resource for contemporary music producers, composers, and educators.

Take your music theory knowledge to the next level and create innovative chord progressions for your latest composition. With a range of internal sounds included, you can explore the tool's features without needing any other external equipment.

Connect your MIDI controller to Chordio and see chord names appear on the Grand Staff in real-time as you play. Solo over chord progressions using the built-in sounds, and quickly rearrange or transpose chord progressions on the fly for added flexibility.

Uncover fresh chord sequences for any genre - from hip hop to house and everything in between. Simply drag and drop them into your DAW!

Chordio empowers you to unleash your creativity and take your music to new heights.

The main features are divided into four workspaces:


• Build-in sequencer to create chord progressions.
• Build-in Chord progression generator.
• 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.


• Practice scales with a metronome in all keys.
• Contains more than 40 scales you can work with.
• Staff view for chords and scales.


• Interactive way to learn what scales are associated with each mode.
• Practice modes in Chordio.
• Change tonic, mode, and layout to discover the relationship between musical notes, chords, and scales.


• 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.
• Save chords as PDF lead sheets. Print your tracks, distribute PDFs to your band members, or just bring them to practice.
• Custom chords, edit existing chords, get extended chords.
• Play internal sounds.
• Arpeggio, strum and performance modes.
• Mac version include a detachable resizable Grand Staff, Chord Display, and Keyboard Views.
• Customise the Keyboard highlight color.
• Select chord, to display a range of related scales and chords.
• Tap a note on the Grand Staff 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 2.8.0

• Expanded the selection of chord progressions in the chord packs
• Bug fixes and improvements

Enjoying the app? We'd love your rating! Your feedback is music to our ears and helps us improve Chordio. For more information, visit

Ratings and Reviews

4.8 out of 5
6 Ratings

6 Ratings

Annoyed by bad UX ,

A phenomenal companion for playing and learning piano

I love the piano - I’ve played my entire life, but I haven’t had lessons or formal training in decades.

I really enjoy sitting down and just playing what comes into my head, but for the longest time I’ve been in search of something that meet me where I’m at and just help me put words or terms to things that sound good when I play them. Like the little chord display that shows up in the playback controller/window in Logic, but without having to open a full DAW.

That’s exactly what I love about this app! First that there’s no setup - I opened the app with my piano plugged in via USB and all of my playing was translated into notation and chords in real time. I can sit and play at my little Nord Grand and when I stumble onto a chord or progression that I really like I can finally put a name to it.

I feel like I’m learning piano again for the first time. Huge thank you to the app dev for making something so approachable and purpose-built. Also it’s minimal and pretty beautifully laid out which is a huge plus. No distractions!

Ork2000 ,

Amazing app

Amazing app designed to craft captivating chord progressions.
Once paired with my midi keyboard it works a treat. Chordio is also great for practicing scales.

chanel-no1 ,

Eharmonics? Change scale

Some of the exercises have the wrong chords E.g, should be GbMaj7 instead of F#M7.

Also, cannot change the key for the exercises and progressions. Should be able to change the key for any progression.

This is a severe limitation.

Am I missing something here or not finding this? Changing the key only changes in the staff, not the chord progressions.

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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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