Comparison

Mozaic Plugin Workshop vs GRFX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

GRFX

Transform ordinary audio into unique sonic textures, evolving soundscapes, and rhythmic glitches. This app offers precise control over sound manipulation with a unique pitch controller, multiple LFOs, and a flexible multi-effect chain. Create complex and immersive audio transformations in real-time.

Highlights
  • Granular engine for textures and rhythms
  • Harmonic Triangle pitch controller
  • Multi-effect chain with probabilistic routing
  • Four self-modulating LFOs
  • Real-time audio sculpting
  • AUv3 plugin and standalone app
Features
Read full description

GRFX is a powerful and creative granular effects processor that turns ordinary audio into extraordinary sonic landscapes. Slice your sound into grains and reshape them into evolving textures, shimmering chords, rhythmic glitches, haunting drones, and more. At the heart of GRFX is the Harmonic Triangle – an intuitive 3-way pitch controller that lets you morph simple tones into lush pads, arpeggiated patterns, or abstract gestures. Whether you’re aiming for organic soundscapes or synchronized stutters, GRFX gives you precise control over the flow of grains and modulation. Build complexity with four self-modulating LFOs, a multi-effect chain with probabilistic routing, and an elegant drag-and-drop modulation system. Shape your sound, modulate nearly every parameter, and sculpt immersive audio transformations in real time. Key Features: - Granular engine for creating textures, rhythms, chords, glitches, drones, ambiences, and more - Harmonic Triangle for 3-way pitch control, detuning, and microtonality - Built-in Chord Selector with 32 triads for instant harmonic richness - Grain envelope shaping for plucky, smooth, or abrupt grains - Buffer size, division, sync, and freeze controls - Rhythmic synchronization for tempo-synced effects and patterns - 4 LFOs with self-modulation and drag-and-drop assignment - Modulation panel & view mode for streamlined modulation management - 2 Multi-Effect slots (Filter, Distortion, Delay, Peak EQ, Chorus, Phaser, Bitcrusher, Reverb) with probability-based routing - Dedicated Send FX with Delay and Reverb in series or parallel mode - Flexible mixer section for sculpting wet/dry balance and routing AUv3 Audio Unit plugin – requires an AUv3-compatible host app such as Logic Pro, GarageBand, AUM, or Cubasis. Standalone version included.

Screenshots

Mozaic Plugin Workshop4 screens
GRFX4 screens

Verdict

The call

The clearest difference is rating: Mozaic Plugin Workshop at 5.0 against GRFX's 4.6. Mozaic Plugin Workshop also leads on price ($1.99 vs $6.99) and review sentiment (95% vs 78%). GRFX's advantage is update cadence (monthly vs every 3 months). On ads, in-app purchases, monetization model and device support 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

CostPrice · In-app purchases · Ads · Monetization

Mozaic Plugin Workshop costs $1.99 and GRFX $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Mozaic Plugin Workshop holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Mozaic Plugin Workshop has 81 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 95% of Mozaic Plugin Workshop's written reviews are positive against 78% of GRFX's.

UpkeepUpdate frequency

Mozaic Plugin Workshop ships an update every 3 months, GRFX monthly. The most recent releases landed on October 2, 2026 and September 26, 2026 respectively.

Scorecard6 real differences · 4 level
Mozaic Plugin Workshop versus GRFX: the parameters behind the verdict, then further details
ParameterMozaic Plugin WorkshopGRFX
Price$1.99 — better$6.99
Rating5.0 (81 ratings) — better4.6 (11 ratings)
Positive reviews94.6% of reviews — better77.8% of reviews
Number of ratings81 — better11
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.4 — better17.0
Further details — not scored
Size3 MB117 MB
Age rating4+4+
DeveloperBram BosImaginando Lda

Customer experience

Mozaic Plugin Workshop

All ratings81 ratings
Positive98.8%
Neutral1.2%
Negative0.0%
Written reviews37 reviews
Positive94.6%
Neutral2.7%
Negative2.7%

GRFX

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews9 reviews
Positive77.8%
Neutral0.0%
Negative22.2%

In-app purchases

None

Mozaic Plugin Workshop

No in-app purchases

None

GRFX

No in-app purchases

Questions

Is Mozaic Plugin Workshop free?
Mozaic Plugin Workshop costs $1.99, with no in-app purchases.
Is GRFX free?
GRFX costs $6.99, with no in-app purchases.
Which has better reviews, Mozaic Plugin Workshop or GRFX?
Mozaic Plugin Workshop is rated higher. Mozaic Plugin Workshop averages 5.0 out of 5 from 81 ratings, while GRFX averages 4.6 from 11 ratings.
Do Mozaic Plugin Workshop or GRFX have ads?
Neither Mozaic Plugin Workshop nor GRFX shows ads.
Which is updated more often, Mozaic Plugin Workshop or GRFX?
Mozaic Plugin Workshop ships an update every 3 months, and GRFX monthly. Most recently, Mozaic Plugin Workshop was updated on October 2, 2026 and GRFX on September 26, 2026.

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