# Arctic ProSynth vs Midiflow Randomizer (Audiobus)

The clearest difference is price: Midiflow Randomizer (Audiobus) at $1.99 against Arctic ProSynth's $9.99. Midiflow Randomizer (Audiobus) also leads on device support (3 vs 1) and iOS requirement (10.2 vs 15.6). Arctic ProSynth's advantage is review sentiment (71% vs 50%) and rating (3.3 vs 3.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Arctic ProSynth costs $9.99 and Midiflow Randomizer (Audiobus) $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arctic ProSynth holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 8 and 4 respectively. Written reviews point the same way: 71% of Arctic ProSynth's written reviews are positive against 50% of Midiflow Randomizer (Audiobus)'s.

Arctic ProSynth ships an update every 4 months, Midiflow Randomizer (Audiobus) every 11 months. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Arctic ProSynth | Midiflow Randomizer (Audiobus) |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Rating | **[3.3 (8 ratings)](https://appshunter.io/ios/app/arctic-prosynth/id676870971/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/midiflow-randomizer-audiobus/id1107244758/reviews) |
| Number of ratings | **8** | 4 |
| Positive reviews | **71.4% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Paid | Paid |
| Size | 47 MB | 5 MB |
| Requires iOS | 15.6 | **10.2** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [One Red Dog Media Pty Ltd](https://appshunter.io/developer/398933972) | [Johannes Doerr](https://appshunter.io/developer/622204117) |

## What reviewers say

### Arctic ProSynth

[App page](https://appshunter.io/ios/app/arctic-prosynth/id676870971)

Create bold and tough electronic music with a modern subtractive synthesizer. Explore rich sound design with powerful oscillators, dual filters, and versatile effects. Record and share your creations easily.

**Highlights:** HyperOscillators for fat sounds, Dual multi-mode filters, Master effects with adjustable order, Integrated Vocoder, 16x4 gated step sequencer, Live audio and MIDI recording, Preset and bank sharing

**In-app purchases:** none


### Midiflow Randomizer (Audiobus)

[App page](https://appshunter.io/ios/app/midiflow-randomizer-audiobus/id1107244758)

This MIDI effect app generates random variations in notes, velocities, and timing for musical sequences. It allows users to specify the range of randomization and can be used with other MIDI tools for harmonious results. Requires Audiobus 3.

**Highlights:** Randomize notes, Randomize note velocities, Randomize timing, Specify variation range, Use multiple instances, Requires Audiobus 3

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Arctic ProSynth free?

Arctic ProSynth costs $9.99, with no in-app purchases.

### Is Midiflow Randomizer (Audiobus) free?

Midiflow Randomizer (Audiobus) costs $1.99, with no in-app purchases.

### Which has better reviews, Arctic ProSynth or Midiflow Randomizer (Audiobus)?

Arctic ProSynth is rated higher. Arctic ProSynth averages 3.3 out of 5 from 8 ratings, while Midiflow Randomizer (Audiobus) averages 3.0 from 4 ratings.

### Do Arctic ProSynth or Midiflow Randomizer (Audiobus) have ads?

Neither Arctic ProSynth nor Midiflow Randomizer (Audiobus) shows ads.

### Which is updated more often, Arctic ProSynth or Midiflow Randomizer (Audiobus)?

Arctic ProSynth ships an update every 4 months, and Midiflow Randomizer (Audiobus) every 11 months. Most recently, Arctic ProSynth was updated on October 15, 2026 and Midiflow Randomizer (Audiobus) on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*