# Midiflow Randomizer (Audiobus) vs Microtonal Lab

The clearest difference is rating: Midiflow Randomizer (Audiobus) at 3.0 against Microtonal Lab's 1.0. Midiflow Randomizer (Audiobus) also leads on price ($1.99 vs $6.99) and ratings volume (4 vs 1). Microtonal Lab's advantage is update cadence (every 2 months vs every 11 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

Midiflow Randomizer (Audiobus) costs $1.99 and Microtonal Lab $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Midiflow Randomizer (Audiobus) holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Midiflow Randomizer (Audiobus) ships an update every 11 months, Microtonal Lab every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Midiflow Randomizer (Audiobus) | Microtonal Lab |
| --- | --- | --- |
| Price | **$1.99** | $6.99 |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/midiflow-randomizer-audiobus/id1107244758/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/microtonal-lab/id6786773427/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 5 MB | 90 MB |
| Requires iOS | **10.2** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Doerr](https://appshunter.io/developer/622204117) | [Martin Adler](https://appshunter.io/developer/1896354791) |

## What reviewers say

### 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


### Microtonal Lab

[App page](https://appshunter.io/ios/app/microtonal-lab/id6786773427)

Explore music beyond the traditional 12-note scale with this comprehensive microtonal studio. Create custom scales, play a microtonal keyboard, sequence patterns, and perform live with a launchpad. Export your creations as MIDI files for further production.

**Highlights:** Harmonic Galaxy visualizer, Microtonal keyboard with custom scales, 32-step sequencer with FX, Launchpad for live performance, Extensive world scale library, Multiple tuning systems support, MIDI export for DAWs

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

**In-app purchases:** none


## Frequently asked questions

### Is Midiflow Randomizer (Audiobus) free?

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

### Is Microtonal Lab free?

Microtonal Lab costs $6.99, with no in-app purchases.

### Which has better reviews, Midiflow Randomizer (Audiobus) or Microtonal Lab?

Midiflow Randomizer (Audiobus) is rated higher. Midiflow Randomizer (Audiobus) averages 3.0 out of 5 from 4 ratings, while Microtonal Lab averages 1.0 from 1 ratings.

### Do Midiflow Randomizer (Audiobus) or Microtonal Lab have ads?

Neither Midiflow Randomizer (Audiobus) nor Microtonal Lab shows ads.

### Which is updated more often, Midiflow Randomizer (Audiobus) or Microtonal Lab?

Midiflow Randomizer (Audiobus) ships an update every 11 months, and Microtonal Lab every 2 months. Most recently, Midiflow Randomizer (Audiobus) was updated on October 24, 2026 and Microtonal Lab on October 24, 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.*