# Midiflow Randomizer (Audiobus) vs Nulltrack

The clearest difference is review sentiment: Nulltrack at 100% against Midiflow Randomizer (Audiobus)'s 50%. Nulltrack also leads on update cadence (every 9 days vs every 11 months). Midiflow Randomizer (Audiobus)'s advantage is price ($1.99 vs $7.99) and device support (3 vs 1). On ads, in-app purchases and monetization model there is nothing between them.

Midiflow Randomizer (Audiobus) costs $1.99 and Nulltrack $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Midiflow Randomizer (Audiobus) ships an update every 11 months, Nulltrack every 9 days. The most recent releases landed on September 25, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Midiflow Randomizer (Audiobus) | Nulltrack |
| --- | --- | --- |
| Price | **$1.99** | $7.99 |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/midiflow-randomizer-audiobus/id1107244758/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 5 MB | 17 MB |
| Requires iOS | **10.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Doerr](https://appshunter.io/developer/622204117) | [DECTET LLC](https://appshunter.io/developer/6780079930) |

## 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


### Nulltrack

[App page](https://appshunter.io/ios/app/nulltrack/id6780079928)

This mobile digital audio workstation offers a unique, grid-based approach to music creation, inspired by classic trackers. It includes built-in synths, a sampler, extensive modulation options, and mixing tools.

**Highlights:** AUv3 plugin support, Two built-in synthesizers, Built-in sampler, Extensive modulation options, Mixing features with track faders, Groove tables for swing/playback, Pattern locking to scales

**In-app purchases:** none


## Frequently asked questions

### Is Midiflow Randomizer (Audiobus) free?

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

### Is Nulltrack free?

Nulltrack costs $7.99, with no in-app purchases.

### Do Midiflow Randomizer (Audiobus) or Nulltrack have ads?

Neither Midiflow Randomizer (Audiobus) nor Nulltrack shows ads.

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

Midiflow Randomizer (Audiobus) ships an update every 11 months, and Nulltrack every 9 days. Most recently, Midiflow Randomizer (Audiobus) was updated on September 25, 2026 and Nulltrack on October 2, 2026.

---

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