Comparison

Midiflow Transposer (Audiobus) 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

Midiflow Transposer (Audiobus)

This MIDI effect app for Audiobus 3 lets you transpose notes by octaves and half-tones. It's useful for playing external keyboards in different keys or creating harmonies. The app is free to use.

Highlights
  • Transpose notes by half-tones
  • Transpose notes by octaves
  • Create harmonies
  • Use multiple instances in Audiobus
  • Essential MIDI effect
Features
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This simple MIDI effect app for Audiobus 3 allows you to transpose notes. You can shift by octaves and half-tones. This is useful if you want play an external keyboard in a different tone. You can also use it to create harmonies, i.e. create a second voice in an interval. Since this app is so essential, you can get it for free. + Shift notes in half-tone steps + Shift notes in octave steps + Use multiple instances of this effect in Audiobus NOTE: This app requires Audiobus 3. Insert it into one or more MIDI effect ports to affect the data going through the respective pipelines.

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
Currently charting
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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

Midiflow Transposer (Audiobus)2 screens
Mozaic Plugin Workshop4 screens

Verdict

The call

The clearest difference is review sentiment: Mozaic Plugin Workshop at 95% against Midiflow Transposer (Audiobus)'s 33%. Mozaic Plugin Workshop also leads on rating (5.0 vs 4.3) and update cadence (every 3 months vs every 9 months). Midiflow Transposer (Audiobus)'s advantage is price (Free vs $1.99) and iOS requirement (10.2 vs 12.4). On ads, in-app purchases 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

Midiflow Transposer (Audiobus) 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.

ReceptionRating · Positive reviews · Number of ratings

Mozaic Plugin Workshop holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Mozaic Plugin Workshop has 81 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 33% of Midiflow Transposer (Audiobus)'s written reviews are positive against 95% of Mozaic Plugin Workshop's.

UpkeepUpdate frequency

Midiflow Transposer (Audiobus) ships an update every 9 months, Mozaic Plugin Workshop every 3 months. The most recent releases landed on August 18, 2026 and September 19, 2026 respectively.

Scorecard8 real differences · 3 level
Midiflow Transposer (Audiobus) versus Mozaic Plugin Workshop: the parameters behind the verdict, then further details
ParameterMidiflow Transposer (Audiobus)Mozaic Plugin Workshop
PriceFree — better$1.99
Rating4.3 (7 ratings)5.0 (81 ratings) — better
Positive reviews33.3% of reviews94.6% of reviews — better
Number of ratings781 — better
Update frequencyEvery 9 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#182 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.2 — better12.4
Further details — not scored
Size5 MB3 MB
Age rating4+4+
DeveloperJohannes DoerrBram Bos

Customer experience

Midiflow Transposer (Audiobus)

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

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

Midiflow Transposer (Audiobus)

No in-app purchases

None

Mozaic Plugin Workshop

No in-app purchases

Questions

Is Midiflow Transposer (Audiobus) free?
Midiflow Transposer (Audiobus) is free to download, 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, Midiflow Transposer (Audiobus) or Mozaic Plugin Workshop?
Mozaic Plugin Workshop is rated higher. Midiflow Transposer (Audiobus) averages 4.3 out of 5 from 7 ratings, while Mozaic Plugin Workshop averages 5.0 from 81 ratings.
Do Midiflow Transposer (Audiobus) or Mozaic Plugin Workshop have ads?
Neither Midiflow Transposer (Audiobus) nor Mozaic Plugin Workshop shows ads.
Which is updated more often, Midiflow Transposer (Audiobus) or Mozaic Plugin Workshop?
Midiflow Transposer (Audiobus) ships an update every 9 months, and Mozaic Plugin Workshop every 3 months. Most recently, Midiflow Transposer (Audiobus) was updated on August 18, 2026 and Mozaic Plugin Workshop on September 19, 2026.

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