Now with MPE, sustain, pitch, mod, automation recording, and 16 channels in a single instance! Crafted with care in Germany.

Reached #1 on the App Store in the Top Paid Music App Category.

The most advanced AUv3 MIDI note editor, modular sequencer and clip launcher on iOS.

- This plugin does not run as a standalone app and requires a compatible host.
- MIDI is not sound. To make sound you'll have to feed the MIDI into a synthesizer or instrument app. Bring your own synths!
- Hardware integration with controllers requires iCloud Drive.

- Special integration with hosts: AUM and Drambo.
- Tested hosts: ApeMatrix, Audiobus, BeatMaker, Cubasis, MTS, Zenbeats. Limited support by NanoStudio 2. Not supported by GarageBand.

Build live sets for clip launching, or an entire track with unlimited length. Play the whole sequence, or adjust the loop markers to iterate over a single section. Step input, or record as played, all with perfect timing accuracy.

Write your own code, share it with the community! You can control hardware devices, adding support for new controllers or completely changing the behavior of existing ones. Build your own styling with custom layouts and themes. Change colors, fonts, sizes… make it yours!

Piano Roll 2 takes all the features you love about the first installment, and expands them into an entirely new breed of modular sequencer and clip launcher, unparalleled in flexibility and depth on iOS. We redesigned it from the ground up to incorporate a plethora of new features and workflows.
- It's a sequencer that augments the capabilities of your host or DAW.
- It's a composition tool that helps you to write beautiful melodies and complex polyrhythmic patterns.
- It's a clip launcher that integrates seamlessly with supported hardware controllers.
- It's a scripting playground that lets you customize your workflow with code.
- It's a swiss-army knife of possibilities when working with MIDI.

Here are just some of the many use cases this modular architecture supports:
- Build live sets for clip launching.
- Compose patterns with touch, Apple Trackpad and Apple Pencil, or use the step input mode to write melodies step-by-step.
- Capture performances in real time and export your patterns as MIDI files.
- Import and edit MIDI files created in other apps, or from commercial packs.
- Record generated MIDI of other plugins or sequencers.
- Write harmonies and counterpoint melodies by superimposing the patterns of other Atoms as ghost lanes.
- Construct complex polyrhythms by taking advantage of custom time signatures and grid fractions.
- Sequence the sequencers for full modular mayhem.

What’s New

Version 2.0.10

- Infinite undo. Edit fearlessly.
- Improved channel targeting: long pressing a channel’s show/lock buttons will now toggle them exclusively, for easier channel switching.
- Improved interplay between user configurations and custom styles: now always using larger fonts when the selected configuration demands them. Configurations (such as Larger Controls and Sausage Fingers) support an "includedStyle" field which always applies the specified stylesheet. In effect, you can now use "Larger Controls" with "Larger Fonts" in combination with "MIDI Channel Colors".
- Added a "MIDI Note Data" example style that shows all note info, including the note’s octave, value, velocity etc.

Note: When iOS notifies Atom of system-wide memory pressure, very old undo/redo history will be discarded.

Ratings and Reviews

4.7 out of 5
67 Ratings

67 Ratings

batsquatch47 ,

Works as advertised, seems like exactly what I needed

I even rebooted the iPad after install, and AUM and AudioBus both agree that this doesn’t appear to be available. Not as an audio unit extension, and not as an inter-app audio device. I’m going to try to uninstall and reinstall it and see if that fixes the issue.

EDIT: I’m an idiot! It’s a MIDI controller, not an input source! Duh! Yeah this is fine, that was totally my bad. Great job!

Fprintf ,

Excellent quality, totally worth the praise

Some folks might question how an app so recently released can have this much praise. It has been painstakingly crafted with feedback from IOS music producers for over a year and it shows. Really amazingly well done and worth it every penny.

maine48 ,

The best

I use my iPad Pro for music production, video production and photo editing. So that being said I have purchased a lot of apps and never once wrote a review but I love this app. While I’m here if the developer so happens to see this review is it possible to bring back the time stretch feature. Great app!

App Privacy

The developer, Victor Porof, 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 Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Diagnostics

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


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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