Mozaic Plugin Workshop

Bram Bos |

ASO score

Text

71/100

Reviews

50/100

Graphic

60/100

Other

0/100

App Rating

4.8

Votes

199

App Age

6y 7m

Last Update

Jul 10, 2025

Compare with Category Top Apps

Metrics	Current App	Category Top Average	Difference
Rating	4.77	4.56	+5%
Number of Ratings (Voted)	195	579.2K	-100%
App Age	6y 7m	7y 11m	-18%
Price	$5	$0
In-app Purchases Price	$0	$41
Update Frequency	80d	31d	+156%
Title Length	22	26	-15%
Subtitle Length	26	27	-4%
Description Length	2 312	2 727	-15%
Number of Screenshots	1092	1256	-13 %
Size	3MB	219MB	-99 %

Category Ranking in United States

Top	Dec 05, 2025	Dec 12, 2025
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Text ASO

Title (

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Mozaic Plugin Workshop

Subtitle (

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Roll Your Own MIDI Plugins

Description (

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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}

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Rating & Reviews

Reviews Overview

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Rating

4.8

199 voters

Some Latest Reviews

Glücklooser

04 Dec, 2025

Alle sind hier so begeistert. Ich finde Mozaic nicht einmal in AUM, deshalb für mich unbrauchbar.

sensiik

07 Aug, 2025

I use it for encoders with relative CC. Two instances allow me to use 8 encoders for 32 params, and see all the values on display. Would be great to have custom layouts, like 8x4 knobs etc, but anyway, I like it.

de22pw

01 Jun, 2024

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.

ReniGhost

31 Mar, 2021

I didn’t know what to do with this app when I first bought it- I’m generally not the kind of guy that writes his own scripts. But once I realized that there are loads of smart people writing and sharing Mozaic scripts on places like patchstorage.com...I began to realize how useful and fun this app can be. I now count this among my very favorite apps! This app + a good synth + AUM = infinite musical possibilities.

Brunos77

04 Feb, 2021

The app works well, however, it took a while to debug, because as it does not provide its own host, when no signal is going through, it's difficult to find out why. I had to download 3 different apps, one to trace midi signals within audiobus, one to trace signals outside of audiobus, and one to route MIDI signals. Also, for some reason, MIDI channels are off-by-one with respect to my other apps and hardware. As many other plugins do, it would be great if it provided its own minimal host, so that you could chose midi in and out directly, which would be very useful during debug.

Torrontés

26 Oct, 2020

Excellent. Adding the ability to load and save individual scripts to a folder in Files would be most welcome.

Gimmea€%~><Nickname

02 Aug, 2020

There is a small selection of interface panels you can use. If you want to do anything complex, you need to do things like reassigning knob functionality based on button/pad selection. This requires dynamically labelling the pads with the knob settings so you can see them when the pad isn’t selected. However, MOZAIC HAS NO STRING VARIABLE SUPPORT. You can only use string constants when setting pad labels. This means that 1000s of lines of if...elseif... code has to be written to cater for every possible label even if you’re only doing this for a couple of pads. The developer has so far refused to implement even the simplest of string variable support (assign/read), so as it stands, Mozaic is severely crippled for anything but the most basic of tasks that require a user interface. RESPONSE: Agreed. You can give a pad a name, but if you want to show the status of 4 knobs in English on that pad it takes over 600 lines of code. Mozaic’s engine is very powerful, but it’s hamstrung (Bramstrung?) by shortcomings in visual feedback to the user. It’s a Ferrari with bicycle wheels... 2ND RESPONSE: Not how it works. Ratings are subjective. Mine is based on the opinion that this issue is the one thing that severely handicaps the capability of Mozaic coupled with the fact that you have refused to even entertain the idea of implementing ANY of the different workarounds for flexible labelling suggested by several sources, not just mine. “I stand by my decision.”

needHymn

01 Aug, 2020

If you can only afford one midi app, you better get this one.

Hypnopad

30 Jul, 2020

This app made things possible on my iPad that were only possible on my laptop before. That’s a big step forward in the iOS music world.

Other

Additional Information

Rating:	4.79
Voted:	199
App Store Link:
Price:	4.99 $
Website:
Email:	-
Privacy Policy:
Categories:	Music, Productivity
Size:	3MB
App Age:	6 years 7 months
Release Date:	May 17, 2019
Last Update:	Jul 10, 2025
Version:	1.4.2

Version history

1.4.2

Jul 10, 2025

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

1.4.1

Jul 07, 2025

Tiny bug fixed.

Mozaic Plugin Workshop

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