Chordbot is a songwriting tool / electronic backup band that lets you create and play complex chord progressions in different arrangements easily. Just add some chords, select a comping style and hit play.

Use it for songwriting experiments, to create backing tracks for practicing solos, or just for fun. Easily create arrangements and mixes by selecting from hundreds of piano, guitar, synth, bass and drum tracks.

This is a fully functional evaluation version of the full (paid) Chordbot version. It has all the features of the full version, but with disabled save and export features.


* 60+ chord types
Including classics like AugAdd2 and Min7(#11), in all inversions.

* 70+ comping style presets
Simple but usable arrangements that won't get in your way.

* 400+ instrument tracks
Individually mixable dynamic instrument tracks that can be combined to form unique comping styles.

* Inversion control / slash chords
Manually select chord inversions, or let Chordbot select the smoothest inversion automatically.

* Song sections
Songs can be structured into repeatable sections (verse, chorus, etc). Each section can have its own comping style/arrangement.

* MIDI/WAV/AudioCopy export and Audiobus support (full version only)
Refine your compositions in a DAW/MIDI sequencer or stream live audio directly to other Audiobus-compatible apps.

* Song-O-Matic
Automatic song generator with pop, jazz and experimental profiles.

See for more information and audio demos.

Please report all bugs to:

Ratings and Reviews

3.9 out of 5
9 Ratings

9 Ratings

Jared™ ,

Chord Visualization needed

Would be awesome if we could get a chord visualizer as a keyboard representation or something.

I’ve played piano for years, and did a little music theory in high school. However, I’ve never really learned all the notes that make up chord notations.

As I experiment with songwriting having a visual representation of the chords would help so much. So I can take what sounds like a nice chord progression, and turn it into something that better fits my musical expression.

Anyways, super cool app, and all the controls are really intuitive. Easy to use, and definitely worth spending the $ if you write your own music regularly.

Guvlem ,


Very nice little app. Easy to work with. I'd like to see a voice recorder. It would make it a much better songwriting tool. Alternate bass notes would be great too. The ability to change chords on the 8th note positions would be helpful too. However, out of all the little free and cheaper apps I've got, I know this is the one I'll actually use. Keep going!

Sketch Tuner ,


Prior to an update months ago, this was a useful product I considered buying. Unfortunately, the updated version crashes every ten minuets and the project disappears. It WAS useful, until the update made it keep crashing on my 4s and 5s. Of course, the solution would probably be to buy an iphone 7 or the soon to be 8, but I don't have a thousand dollars to spend.

App Privacy

The developer, Contrasonic AB, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Contrasonic AB
34.2 MB

Requires iOS 8.0 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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