Chord Progressions

  • Lots of scales, their notes or chords in triad or extended forms, with lots of chord progressions with ability to create custom ones, under your hand.

    ChordBud is ultimate song writing app with super simple usage.

    It does not generate sound but has built-in MIDI Sequencer that send MIDI to outside of the app.

Connect your MIDI instrument.

Create up to 16 Tracks

  • You can work with up to 16 different tracks.

  • Assign different MIDI channels to them.

Smart layout on iOS Devices.

MIDI Sequencer

  • Since the ChordBud is not generate sound, even better it can send MIDI to other apps in your iOS device, connected hardware or CoreMIDI enabled software on your Mac or PC via network session.

    You can choose the MIDI outputs from project's settings.

    Press the play button on project screen to listen all your tracks.

    Press the play button on track screen to listen just your track.

    Also, you can assign different MIDI channels to your tracks from track settings menu.

Connect your MIDI instrument.

Modal Interchange with lots of Scales

  • There are lots of scales you can select, reorder and work with.

    Billions of modal interchange possibilites under your hand.

    You can see the chords or notes in the scale's harmonic field.

Smart layout on iOS Devices.

Create Custom Chord Progressions

  • You can either select one of built-in chord progressions.

    They are most common progressions from classical to modern songs.

    Or of course, can create your very own.

    There is also a recommendation tool that helps you to build your custom progression.

Connect your MIDI instrument.

Work with Chords or Notes

  • You can either work with notes or chords.

    Select notes input for creating matching melodies or bass lines with your chord progressions.

    Also, you are not limited with triads. You can work with 7th or even extended chords. There are billions of possibilities.

Smart layout on iOS Devices.

Download for iOS

Open source

ChordBud offers its core componets on Github.
They are all shared libraries for iOS, macOS and tvOS platforms, written in Swift.

Music Theory

A music theory library with Note, Interval, Scale and Chord representations in Swift enums.

MIDI Sequencer

AudioKit powered MIDI sequencer with no hassle.

MIDI Time Table

Fully custumisable and editable time table view for MIDI or audio related data display.


AUv3 MIDI Recorder.

Other Apps

There are other great music theory apps available.


A music theory app that shows you lots of scales and chords with lots of features.


A music theory app for guitar, bass or any kind of instrument player with frets.


A powerful chord progression app with built-in MIDI sequencer.


MIDI Sequencer and Arpeggiator for iOS.


AUv3 MIDI Music Theory Keyboard for iOS.


AUv3 MIDI Sequencer for iOS.


AUv3 MIDI Rhythm Generator for iOS.

ArpBud 2

AUv3 MIDI Arpeggiator.

ChordBud 2

AUv3 MIDI Chord Sequencer.

Chord Detector

Mac Status Bar App.


Techno Bass Lines.


AUv3 MIDI Sequencer.

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