MIDISpy vs Mozaic Plugin Workshop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MIDISpy
This utility helps monitor MIDI connections across various platforms. It offers basic filtering for different MIDI message types and supports multiple connectivity options.
- Standalone and AUv3 support
- Basic message filtering
- Inter-App MIDI
- USB MIDI
- Bluetooth MIDI
- Network MIDI
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MIDISpy - MIDI Monitor A handy little utility for monitoring MIDI connectivity. Overview: - Standalone and AUv3 support - Basic Filters for Note, Control Change, Clock and SysEx messages Connectivity: - Inter-App MIDI - USB MIDI - Bluetooth MIDI - Network MIDI - AUv3 Requirements: - iOS9+
Mozaic Plugin Workshop
Design and build your own custom MIDI plugins for music production. This tool offers a simple yet powerful scripting language and pre-built components to create filters, sequencers, and generative music tools. It integrates with AUv3 MIDI hosts for seamless workflow.
- 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
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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
Screenshots
Verdict
The clearest difference is price: MIDISpy at Free against Mozaic Plugin Workshop's $1.99. MIDISpy also leads on update cadence (every 3 weeks vs every 3 months). Mozaic Plugin Workshop's advantage is rating (5.0 vs 4.0) and review sentiment (95% vs 71%). On ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
MIDISpy is free to download; Mozaic Plugin Workshop costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mozaic Plugin Workshop holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Mozaic Plugin Workshop has 81 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 71% of MIDISpy's written reviews are positive against 95% of Mozaic Plugin Workshop's.
MIDISpy ships an update every 3 weeks, Mozaic Plugin Workshop every 3 months. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.
| Parameter | MIDISpy | Mozaic Plugin Workshop |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.0 (4 ratings) | 5.0 (81 ratings) — better |
| Positive reviews | 71.4% of reviews | 94.6% of reviews — better |
| Number of ratings | 4 | 81 — better |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 12.4 |
| Further details — not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Aras | Bram Bos |
Customer experience
MIDISpy
Mozaic Plugin Workshop
In-app purchases
MIDISpy
No in-app purchases
Mozaic Plugin Workshop
No in-app purchases
Questions
Is MIDISpy free?
Is Mozaic Plugin Workshop free?
Which has better reviews, MIDISpy or Mozaic Plugin Workshop?
Do MIDISpy or Mozaic Plugin Workshop have ads?
Which is updated more often, MIDISpy or Mozaic Plugin Workshop?
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