# KORG Module Pro vs Midiflow Keyboard (Audiobus)

The clearest difference is price: Midiflow Keyboard (Audiobus) at $2.99 against KORG Module Pro's $39.99. Midiflow Keyboard (Audiobus) also leads on in-app purchases (none vs 20) and rating (5.0 vs 4.6). KORG Module Pro's advantage is update cadence (monthly vs every 9 months) and ratings volume (1.2K vs 6). On ads and device support there is nothing between them.

KORG Module Pro costs $39.99 and Midiflow Keyboard (Audiobus) $2.99 up front. KORG Module Pro sells 20 one-off in-app purchases. Midiflow Keyboard (Audiobus) asks for nothing beyond the download.

Midiflow Keyboard (Audiobus) holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: KORG Module Pro has 1.2K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 64% of KORG Module Pro's written reviews are positive against 50% of Midiflow Keyboard (Audiobus)'s, so the app with the better star average is not the one people write more warmly about.

KORG Module Pro ships an update monthly, Midiflow Keyboard (Audiobus) every 9 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KORG Module Pro | Midiflow Keyboard (Audiobus) |
| --- | --- | --- |
| Price | $39.99 | **$2.99** |
| Rating | [4.6 (1.2K ratings)](https://appshunter.io/ios/app/korg-module-pro/id932191687/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/midiflow-keyboard-audiobus/id1092870508/reviews)** |
| Number of ratings | **1.2K** | 6 |
| Positive reviews | **63.8% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1.7 GB | 5 MB |
| Requires iOS | 15.6 | **10.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [Johannes Doerr](https://appshunter.io/developer/622204117) |

## What reviewers say

### KORG Module Pro

[App page](https://appshunter.io/ios/app/korg-module-pro/id932191687)

This app provides a high-quality mobile sound module for iOS devices, offering professional piano and keyboard sounds. It's ideal for live performance and music production, allowing users to create studio-quality music anywhere with just an iOS device and a MIDI keyboard. Expandable sound libraries and integration with other music apps enhance its capabilities.

**Highlights:** High-quality piano and keyboard sound engines, Six dedicated sound engines, Ultra-low latency, AUv3 support, Set list function with score viewer, Expansion sound libraries, Performance recording and sharing

**Features:** Family Sharing

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hybrid Synth Essential 2 | $3.99 | one-time |
| Future Synths | $4.99 | one-time |
| London Symphonic Orchestra | $6.99 | one-time |
| Dream Pop | $6.99 | one-time |
| Petrichor | $6.99 | one-time |
| Shoulder Pads | $6.99 | one-time |
| Space Western | $6.99 | one-time |
| Wurley Electric Piano | $9.99 | one-time |
| Mellow Tape Keyboard | $9.99 | one-time |
| Soundiron Voice of Rapture Soprano | $9.99 | one-time |
| Wild Kits | $9.99 | one-time |
| Dreamy Synths | $9.99 | one-time |
| Organ & Clav Collection | $19.99 | one-time |
| TRITON Best Selection | $19.99 | one-time |
| 80's Electric Piano | $19.99 | one-time |
| Orchestral Dreams | $19.99 | one-time |
| Classic EP-88M | $19.99 | one-time |
| Ivory Mobile Grand | $29.99 | one-time |
| Module Performance Expansion | $29.99 | one-time |
| Ivory Mobile American D | $29.99 | one-time |

**What reviewers like**

- 🎹 Excellent sound quality
- 🎨 Versatile sound library
- 📋 Useful set list functionality
- 🔌 Good MIDI integration
- 💻 Seamless integration with Korg Gadget

**What reviewers complain about**

- 🔇 Low volume/output issues
- 🐛 Crashes and stability problems
- 🔀 Inconsistent behavior when switching patches
- 🔒 Difficulty restoring purchased content
- 🔍 Limited sound customization options

**Reported bugs**

- Purchased content not appearing or disappearing
- Sustain pedal not functioning properly
- Polyphony issues causing notes to drop out
- Compatibility problems with newer iOS versions

**Requested features**

- Add split and layer functionality
- Implement MIDI learn capabilities
- Improve set list management with reordering and copying
- Add support for background audio and AUv3
- Provide better integration with other Korg apps


### 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


## Frequently asked questions

### Is KORG Module Pro free?

KORG Module Pro costs $39.99, and also offers in-app purchases.

### Is Midiflow Keyboard (Audiobus) free?

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

### Which has better reviews, KORG Module Pro or Midiflow Keyboard (Audiobus)?

Midiflow Keyboard (Audiobus) is rated higher. KORG Module Pro averages 4.6 out of 5 from 1.2K ratings, while Midiflow Keyboard (Audiobus) averages 5.0 from 6 ratings.

### Do KORG Module Pro or Midiflow Keyboard (Audiobus) have ads?

Neither KORG Module Pro nor Midiflow Keyboard (Audiobus) shows ads.

### Which is updated more often, KORG Module Pro or Midiflow Keyboard (Audiobus)?

KORG Module Pro ships an update monthly, and Midiflow Keyboard (Audiobus) every 9 months. Most recently, KORG Module Pro was updated on October 27, 2026 and Midiflow Keyboard (Audiobus) 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.*