# Mozaic Plugin Workshop — Roll Your Own MIDI Plugins

> Create custom MIDI plugins with a user-friendly scripting language and pre-built components. (iPhone/iPad app by Bram Bos.)

- Source: https://appshunter.io/ios/app/mozaic-plugin-workshop/id1457962653 (this page in markdown: same URL + `.md`)
- Developer: [Bram Bos](https://appshunter.io/developer/325340444)
- Category: Music, Productivity
- Price: $1.99 (on sale, was $4.99)
- Rating: 5.00/5 from 81 App Store ratings · 37 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.4 · 3 MB
- Languages: American English
- Released: 2019-05-17
- Data updated: 2026-09-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/mozaic-plugin-workshop/id1457962653/reviews.md

## What is Mozaic Plugin Workshop?

Create your own MIDI plugins: MIDI filters, generative music tools, basic sequencers, MIDI control panels, chaos experiments... Let your imagination take you places. 

Mozaic runs inside your favorite AU MIDI host, and gives you practical building blocks such as LFOs, pre-fab GUI layouts, musical scales, AUv3 support (with AU Parameters, transport events, tempo syncing, etc.), random generators and a super-simple yet powerful script language. Mozaic even offers quick access to your device’s Tilt Sensors for expressive interaction concepts!

The Mozaic Script language is designed from the ground up to be the easiest and most flexible MIDI language on iOS. A language by creatives, for creatives. You’ll only need to write a few lines of script to achieve impressive things - or to create that uber-specific thing that was missing from your MIDI setup.

Check out the Programming Manual on Ruismaker.com to learn about the script language and to get inspiration for awesome scripts of your own.

Mozaic comes with a sizable collection of tutorials and pre-made scripts which you can use out of the box, or which can be a starting point for your own plugin adventures. 

Features in a nutshell:
- Easy to learn Mozaic Script language: easy to learn, easy to read 
- Sample-accurate-everything: the tightest MIDI timing possible
- Built-in script editor with code-completion, syntax hints, etc.
- 5 immediately usable GUI layouts, with knobs, sliders, pads, etc.
- In-depth, helpful programming manual available on Ruismaker.com
- Easy access to LFOs, scales, MIDI I/O, AU parameters, timers
- Supports Sysex, with built-in checksum calculations
- AUv3; so you'll get multi-instance, state-saving, tempo sync and resource efficiency out of the box

Mozaic opens up the world of creative MIDI plugins to anyone willing to put in a few hours and a hot beverage or two.

Practical notes: 
- Mozaic requires a plugin host with support for AUv3 MIDI plugins (AUM, ApeMatrix, Cubasis, Auria, Audiobus 3, etc.)
- The standalone mode of Mozaic lets you edit, test and export projects, but for MIDI connections you need to run it inside an AUv3 MIDI host
- MIDI is not sound; Mozaic on its own does not make noise... so bring your own synths, drum machines and other instruments! 
- AUv3 MIDI requires iOS11 or higher

## Key features

- Custom MIDI plugin creation
- Easy-to-learn scripting language
- Generative music tools
- MIDI filters and sequencers
- AUv3 support
- Tilt sensor integration
- Built-in script editor

## Chart rankings

- #147 in Top Paid · Music (US App Store)

## Recent user reviews (10 of 37)

All indexed reviews: https://appshunter.io/ios/app/mozaic-plugin-workshop/id1457962653/reviews.md

### 3/5 — Powerful concept and useful, but still has few kinks that needs to be fixed

*2026-06-27, version 1.4.2*

Love the concept — a scriptable AUv3 MIDI plugin is brilliant for custom iOS rigs. But the scripting language is surprisingly fragile. Even with AI assistance, simple scripts took multiple rounds to get right due to inconsistent syntax and poor documentation. Two requests: add a clear button for the Log console, and append logs to the bottom, not the top. Enormous potential — please keep polishing it!

### 5/5 — So gut!

*2024-06-01*

Stundenlang nach einem bestimmten MIDI Effekt in den Apps gesucht… nichts gefunden, was funktioniert… Dann die Erleuchtung — da gibt‘s ja auch noch Mosaic! In 15 Minuten selbst geschrieben, läuft reibungslos und latenzfrei. What?? Ok, ich hatte vorher schon mal 1,5 Stunden in meine Lernkurve investiert, aber die Skriptsprache ist so straightforward und die Anleitung so kurzweilig, dass das das reine Vergnügen war. Wer gerne kreativ tätig und nicht total code-avers ist, kann hier ne Menge Freude haben.

### 5/5 — Still the King of Midi Mangling

*2024-02-06, version 1.3.16*

I mostly buy music apps use them 2-3 times and then abandon them until out of nowhere both the necessity and remembrance of such tools comes synchronously.

Mozaic however, has literally been a plug-in I have tons of instances of ON ANY project. Whilst not the most trivial app, requiring the user to code… after little over a month or two I was making plugs you just can’t find anywhere in the AppStore. 

I use mozaic for everything, literally has made multiple useless controllers into usable gear (midi stuff obviously) and that doesn’t even account for all the procedural music you can generate (or accompany) with the use of such a versatile tool. 

Whilst I completely understand why Bram hadn’t made Mozaic 2 (probably not a big seller in comparison to his other amazing apps), I still wish everyday such tool will eventually bless us (perhaps with a modular interface that allows us to build the UI, a la “loopy pro”). 

My favorite app by Bram, and it hurts to say so cause every single one is amazing (but this one is a game changer for real).

### 5/5 — ABSOLUTELY OUTSTANDING

*2023-08-28, version 1.3.14*

I purchased this app to enable me to receive and send SysEx data dumps from my keyboard to Cubasis3 on my iPad, mainly to change the transpose to what ever key I require, but just by selecting one of many templates in Mozaic I was able to achieve my goals without any effort on my part.  Best purchase ever in my opinion.
Worthy of 10 stars ⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️

### 5/5 — Essential

*2023-06-04, version 1.3.14*

Essential for ios midi affairs.. also great manual that lays bare midi's inner workings

### 5/5 — Absolutely incredible!

*2023-05-09, version 1.3.14*

I started out using this app to make my old Novation LaunchControl Mk1 light up the pads when i pressed them, and as I got to grips with the incredible Mozaic programming language I came to realise the vast possibilities I suddenly had at my fingertips. This has turned my simple hardware and ipad combination into something that can do exactly what i want it to do, no need to search for other apps that can sort of get me close to what I want. Incredible.

### 5/5 — Sick

*2022-11-29, version 1.3.14*

Need custom midi control? This lets you code your own midi plugins, 🎉WITH UI🎉 or download from others on patchstorage. No mac, no deployment, no developer’s license required. Absolutely incredible.

### 5/5 — Launch control XL script

*2022-11-24, version 1.3.14*

Did some internet research and discovered a script that gave LED feedback. It worked!  Fantastic for feedback on the controller when performing live. Overjoyed!  Many thanks Mr Mosaic!

### 5/5 — Hi dev

*2022-08-25, version 1.3.14*

Dev,

When copy pasting from Microsoft Word, it doesn’t recognize the new line characters. It displays them perfectly, but it won’t run the script.

### 5/5 — Excellent AUM midi tool, THANKS!

*2022-01-29, version 1.3.12*

You don’t need to be a script writer or programmer to get some great midi tools/apps built with this application. A lot of great midi plugins have already been created by the gear heads.

I needed a midi clock for external midi gear in AUM and found one made with Mozaic. I suggest you go to ruismaker.com for info and patchstorage.com to checkout the Mosaic tools/patches/applications currently available.

If you are a gear head enthusiast. You can make your own tools or modify someone else’s code. I’ve used many script languages in my computer career and the developer has done an excellent job with this app. I added two simple program patch selectors for the ARTURIA MicroFreak and KORG Minilogue XD. I’m a bit rusty in writing code, but it didn’t take long to make something useful.

My only complaint is that the description makes it appear that this is purely a developer tool.
Mozaic Plugin Work Shop - Roll Your Own Midi Plugins 

Just a suggestion, how about something like this. 
Mozaic Midi Tools - Write Your Own or Use Shared Code

I think many AUM users missed this app and its usefulness, I know I did. I skipped over it but came back after my search for a AUM midi clock solution. It’s a gateway to many useful tools/apps, with more to come.

Thanks Bram Bos for this and all of your other iOS apps.

## Frequently asked questions about Mozaic Plugin Workshop

### What does Mozaic Plugin Workshop do?

Mozaic Plugin Workshop allows users to create their own custom MIDI plugins. These can range from simple MIDI filters and control panels to complex generative music tools and sequencers. The app provides building blocks and a scripting language to bring these ideas to life within a compatible AUv3 MIDI host.

### What are the key features of Mozaic Plugin Workshop?

Key features include an easy-to-learn scripting language designed for creatives, sample-accurate MIDI timing, a built-in script editor with helpful features, pre-made GUI layouts, and access to components like LFOs and musical scales. It also supports AUv3 for efficient integration and multi-instance use.

### How much does Mozaic Plugin Workshop cost?

Based on the provided information, Mozaic Plugin Workshop is a paid application. There are no mentions of free trials, subscriptions, or in-app purchases, indicating a one-time purchase model.

### What are the compatibility requirements for Mozaic Plugin Workshop?

Mozaic Plugin Workshop requires a plugin host that supports AUv3 MIDI plugins, such as AUM, ApeMatrix, Cubasis, Auria, or Audiobus 3. It also requires iOS 11 or higher. It's important to note that Mozaic itself does not produce sound; it requires separate synths or instruments.

### What are some common use cases for Mozaic Plugin Workshop?

Common use cases include creating unique MIDI filters to shape your instrument's input, developing generative music tools for algorithmic composition, building custom sequencers tailored to specific needs, and designing MIDI control panels for hands-on interaction. It's ideal for users who want to go beyond standard MIDI effects.

## Version history (last 5 releases)

### 1.4.2 — 2025-07-10

Small fix: filenames are now remembered across sessions when saving/opening files

### 1.4.1 — 2025-07-07

Tiny bug fixed.

### 1.4 — 2025-07-03

Improved preset manager, supporting import/export of presets, drag & drop and creation of subfolders.

### 1.3.17 — 2024-07-29

Bug fixes

### 1.3.16 — 2024-02-05

- Fixed a bug where using host count-in sometimes caused the first beat to be skipped
- Minor update to text view behavior

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## More apps by Bram Bos

- [Ruismaker](https://appshunter.io/ios/app/ruismaker/id1122156899)
- [Ruismaker FM](https://appshunter.io/ios/app/ruismaker-fm/id1143644577)
- [Phasemaker](https://appshunter.io/ios/app/phasemaker/id1161642832)
- [Troublemaker](https://appshunter.io/ios/app/troublemaker/id1180892130)
- [Ripplemaker](https://appshunter.io/ios/app/ripplemaker/id1207806723)
- [Rozeta Sequencer Suite](https://appshunter.io/ios/app/rozeta-sequencer-suite/id1292546479)

All apps by Bram Bos: https://appshunter.io/developer/325340444

## Related topics

[mozaic plugin workshop](https://appshunter.io/ios/topics/mozaic-plugin-workshop) · [mozaic](https://appshunter.io/ios/topics/mozaic)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-15.*