Steps by Reactable is a small yet powerful MIDI sequencer that allows you to create complex rhythmic patterns in a surprising new way. Forget piano rolls and experiment with Steps’ inspiring dials. With Steps you can control any MIDI compatible app, send MIDI over network to your laptop or any other compatible device, and even synchronize external hardware analog synths such as Korg Volcas or Pocket Operators via an audio cable.


- Plug and play MIDI-out system automatically sends to all available MIDI input ports and our own virtual port.

- Bluetooth LE MIDI support

- Audiobus 3 Support as MIDI and Audio Sender

- Connect your iDevice with an external MIDI interface and control MIDI hardware.

- Synchronize external hardware synths such as Korg Volca or Pocket operators via the audio output.

- A carefully designed user interface that allows you to quickly switch between performance to editing mode.

- Play together with Ableton Link and sync multiple apps and devices over WiFi.

- Global Swing function (50% - 75%) - applied automatically to eight and sixteenth notes.

- Save and recall sequences, seamlessly during playback.

- Global bpm control ranging from 20 to 999 BPM.

- Global Gate level allows global control of note duration.

- Global MIDI velocity control.

- Global Glide function applies pitch bend to small distances between adjacent steps (if the synth being controlled supports pitch bend).

- Global transpose ribbon allows for easy transposition of the entire pattern.

- Step pitch preview function (available while transport is stopped).

What's New

Version 1.4

Now supporting iPhones and iPads.

Ratings and Reviews

4 out of 5

6 Ratings

6 Ratings

Is that all?


Quite a disappointment. After the glowing review in CDM, I was expecting so much more. But this is basically an eight(!) step monophonic sequencer with a gratuitously confusing UI. I've used plenty of other music software, and I've read the online "manual" for this, so I'm pretty sure I'm not missing the point completely. And I've tried the presets, which are all useless: either simple rhythms on one note, or simple scales. If this app is useful for anything interesting, as Peter Kirn sure seems to think it is, then the secret must be buried in some hidden setting I couldn't discover.

Don't be like me


Read through an app before you buy it. If you buy it read the facts on it. Great app, user error may happen.

Developer Response

Hello Liam:

Sorry for the misconception but STEPS is a MIDI sequencer that sends notes to other apps or devices that produce the sound. The pulse sound you hear when "Send External Hardware Sync" is selected is intended as a clock signal to other hardware Synthesizers to stay at the same BPM.

In the video

you can see we are using it next to the pocket operators so that their clocks go at the same time. The notes themselves are generated with the Korg Volca Sample via the MIDI cable.

Sorry for the confusion, we tried to be very explicit about this but will keep working to communicate it better. If this information helped please reconsider changing or removing the review and we will make our communications on the functionality more evident.

Best regards,
the Reactable Team

Pretty weak...


One star for app because you can't leave zero stars. One star for unique concept.

Can't turn off outbound midi. Switches are there but they reset. No way to set scale. No velocity per step.

Should be free. Even .99 is too much for this. It's like a high school programming project.


Reactable Systems SL
7.7 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Reactable Systems, S.L.


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