Comparison

GridInstrument vs Mozaic Plugin Workshop

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

Head to head
About

GridInstrument

This app transforms your iOS device into a unique musical instrument with a grid-based interface. Explore over 20 musical modes and various grid layouts. It also supports external MIDI controllers like the Launchpad for expanded creative possibilities.

Highlights
  • Grid-based note arrangement
  • Launchpad integration
  • Over 20 musical modes
  • Multiple grid layouts
  • Core MIDI out
  • Audiobus 3 MIDI support
Features
Read full description

GridInstrument lets you play your iOS device like a musical instrument. Instead of a piano keyboard, notes are arranged on a grid. It also lets you hook up your Launchpad device (using the Apple Camera Connection Kit) and play that as well! Features: - Launchpad integration (connect your Launchpad Mini in low-power mode without a hub or any other Launchpad with a powered hub) - Change octaves - Change keys - Change from over 20 musical modes ("Major, Minor, Dorian, Mixolydian, etc.") - Choose between three grid layouts ("Diatonic", "Chromatic/4ths String Layout", "Drum rack"), as well as row note offset/overlap setting - Core MIDI out so that you use GridInstrument to control your other instruments - Audiobus 3 MIDI support - MIDI note input so that you can see notes triggered by other devices on your grid Want to see some other feature implemented? Contact us at the Decidedly website.

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

Screenshots

GridInstrument2 screens
Mozaic Plugin Workshop4 screens

Verdict

The call

The clearest difference is rating: Mozaic Plugin Workshop at 5.0 against GridInstrument's 4.5. Mozaic Plugin Workshop also leads on review sentiment (95% vs 83%) and ratings volume (81 vs 11). GridInstrument's advantage is update cadence (weekly vs every 3 months) and iOS requirement (8.0 vs 12.4). 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

GridInstrument costs $3.99 and Mozaic Plugin Workshop $1.99 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 4.5. 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: 83% of GridInstrument's written reviews are positive against 95% of Mozaic Plugin Workshop's.

UpkeepUpdate frequency

GridInstrument ships an update weekly, Mozaic Plugin Workshop every 3 months. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

Scorecard6 real differences · 4 level
GridInstrument versus Mozaic Plugin Workshop: the parameters behind the verdict, then further details
ParameterGridInstrumentMozaic Plugin Workshop
Price$3.99$1.99 — better
Rating4.5 (11 ratings)5.0 (81 ratings) — better
Positive reviews83.3% of reviews94.6% of reviews — better
Number of ratings1181 — better
Update frequencyWeekly — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.4
Further details — not scored
Size15 MB3 MB
Age rating4+4+
DeveloperDecidedly, LLCBram Bos

Customer experience

GridInstrument

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews24 reviews
Positive83.3%
Neutral12.5%
Negative4.2%

Mozaic Plugin Workshop

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

In-app purchases

None

GridInstrument

No in-app purchases

None

Mozaic Plugin Workshop

No in-app purchases

Questions

Is GridInstrument free?
GridInstrument costs $3.99, with no in-app purchases.
Is Mozaic Plugin Workshop free?
Mozaic Plugin Workshop costs $1.99, with no in-app purchases.
Which has better reviews, GridInstrument or Mozaic Plugin Workshop?
Mozaic Plugin Workshop is rated higher. GridInstrument averages 4.5 out of 5 from 11 ratings, while Mozaic Plugin Workshop averages 5.0 from 81 ratings.
Do GridInstrument or Mozaic Plugin Workshop have ads?
Neither GridInstrument nor Mozaic Plugin Workshop shows ads.
Which is updated more often, GridInstrument or Mozaic Plugin Workshop?
GridInstrument ships an update weekly, and Mozaic Plugin Workshop every 3 months. Most recently, GridInstrument was updated on November 3, 2026 and Mozaic Plugin Workshop on November 12, 2026.

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