Unlimited Steps with Unlimited Possibilities

  • Add as many steps as you want to your sequencer.

  • Assign chords or notes in any scale and a key or create your custom notes.

  • Edit rate, gate time, velocity, modulation, pitch bend, portamento and repate count of each step.

Music theory tool

Built-in Music Theory Engine with +40 Scales

  • Select your scale and your key to work with.

  • You may change sequencer mode from single notes to chords.

  • Your faders range will be automatically updated to the selected scale, even if you are already sequencing it will update immediately.

  • You may adjust your faders range by setting the minimum - maximum octaves from the settings strip.

  • In chord mode, your faders range will be updated by the chords in the scale you are working in with triads, 7th, 9th, 11th and 13th variations.

Interval sequencer.

Edit the Notes of Your Steps with a Keyboard

  • You can set custom notes or chords for any of your step.

  • In that mode, you can work with the virtual keyboard or even your own MIDI keyboard.

  • You can select a different scale or a key other then the sequencer's scale. You can quickly pick notes or chords in the scale you selected.

  • You can see your selected notes and even listen them if you press the Preview button.

Sequencer & Arpeggiator.

Take advantage of AUv3 Plugin

  • Use it in supporting hosts like AUM, Audiobus 3, Cubasis 2, Beat Maker 3, apeMatrix and Sequencism.

  • Route its MIDI to other AUv3 Synths.

  • Route your MIDI Keyboard's or other MIDI app's MIDI Out to ScaleBud for always playing in scale.

  • In note mode, ScaleBud will filter out off-scale notes.

  • In chord mode, ScaleBud will play chords, if any available in the scale you're working in for the root note you are sending.

Interval sequencer.

Audiobus MIDI Sending and Ableton Link

  • You can use it in the Audiobus 3 as a MIDI Sender.

    In that mode, you can sequence the connected app.

  • Also, you can use Ableton Link for being in sync with the other supporting apps.

    In that mode, it will filter out off-scale notes in scale mode, and sends the chords in chord mode.

Sequencer & Arpeggiator.

Download for iOS

Open source

StepBud 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.


Send and receive MIDI in human language with Swift enums.


@IBDesignable Horizontal or vertical UIControl subclass that can start from bottom or middle of the control.

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.


AUv3 MIDI Recorder.


Techno Bass Lines.


AUv3 MIDI Sequencer.

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