# Midiflow Keyboard (Audiobus) vs simple loop machine

The clearest difference is price: simple loop machine at Free against Midiflow Keyboard (Audiobus)'s $2.99. simple loop machine also leads on update cadence (every 4 days vs every 9 months). Midiflow Keyboard (Audiobus)'s advantage is ads (none vs shown) and iOS requirement (10.2 vs 17.0). On in-app purchases and device support there is nothing between them.

simple loop machine is free to download; Midiflow Keyboard (Audiobus) costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Midiflow Keyboard (Audiobus) ships an update every 9 months, simple loop machine every 4 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Midiflow Keyboard (Audiobus) | simple loop machine |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/midiflow-keyboard-audiobus/id1092870508/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 4 days** |
| Monetization | Paid | — |
| Size | 5 MB | 5 MB |
| Requires iOS | **10.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Doerr](https://appshunter.io/developer/622204117) | [GoateeAllstars](https://appshunter.io/developer/1817807346) |

## What reviewers say

### Midiflow Keyboard (Audiobus)

[App page](https://appshunter.io/ios/app/midiflow-keyboard-audiobus/id1092870508)

This music app provides a versatile keyboard interface for controlling multiple synth applications simultaneously. It offers various layouts, including piano, scales, and chords, with customizable controls for pitch, modulation, and note velocity. Designed to integrate seamlessly with Audiobus 3, it enhances mobile music production.

**Highlights:** Piano, scale, and chord layouts, Multiple independent keyboard strips, Adjustable key range and octaves, Pitch-bend and modulation wheels, Hold mode with unisono option, Velocity control via touch or accelerometer, Split View/Slide Over support

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

**In-app purchases:** none


### simple loop machine

[App page](https://appshunter.io/ios/app/simple-loop-machine/id6771816478)

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

**In-app purchases:** none


## Frequently asked questions

### Is Midiflow Keyboard (Audiobus) free?

Midiflow Keyboard (Audiobus) costs $2.99, with no in-app purchases.

### Is simple loop machine free?

simple loop machine is free to download, with no in-app purchases.

### Do Midiflow Keyboard (Audiobus) or simple loop machine have ads?

simple loop machine shows ads; Midiflow Keyboard (Audiobus) does not.

### Which is updated more often, Midiflow Keyboard (Audiobus) or simple loop machine?

Midiflow Keyboard (Audiobus) ships an update every 9 months, and simple loop machine every 4 days. Most recently, Midiflow Keyboard (Audiobus) was updated on November 2, 2026 and simple loop machine on November 5, 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.*