# KORG Module Pro vs AUM

The clearest difference is price: AUM at $24.99 against KORG Module Pro's $39.99. AUM also leads on review sentiment (82% vs 64%) and iOS requirement (12.0 vs 15.6). KORG Module Pro's advantage is update cadence (monthly vs every 3 months) and chart position (#155 vs unranked). On rating, ratings volume, ads and in-app purchases there is nothing between them.

KORG Module Pro costs $39.99 and AUM $24.99 up front. KORG Module Pro sells 20 one-off in-app purchases and AUM sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for KORG Module Pro against 4.7 for AUM. Both are backed by a comparable volume of ratings — 1.2K and 534 respectively. Written reviews are what separate them: 64% of KORG Module Pro's written reviews are positive against 82% of AUM's.

KORG Module Pro ships an update monthly, AUM every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | KORG Module Pro | AUM |
| --- | --- | --- |
| Price | $39.99 | **$24.99** |
| Rating | [4.6 (1.2K ratings)](https://appshunter.io/ios/app/korg-module-pro/id932191687/reviews) | **[4.7 (534 ratings)](https://appshunter.io/ios/app/aum-audio-mixer/id1055636344/reviews)** |
| Number of ratings | **1.2K** | 534 |
| Positive reviews | 63.8% of reviews | **81.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#155** | — |
| Size | 1.7 GB | 13 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [Kymatica AB](https://appshunter.io/developer/522046659) |

## What reviewers say

### KORG Module Pro

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

**Currently charting:** #155 Top Paid · Music (US App Store)

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


### AUM

[App page](https://appshunter.io/ios/app/aum-audio-mixer/id1055636344)

This app is a versatile audio mixer, recorder, and connection hub for mobile devices. It allows users to connect various audio sources, route signals, apply effects, and record mixes with high fidelity. It supports advanced features like MIDI control, synchronization, and integration with other audio apps and hardware.

**Highlights:** Connect hardware inputs/outputs, Route audio and MIDI, Host Audio Unit extensions, Record mixes and individual tracks, Synchronize with Ableton Link, Built-in processing nodes, MIDI control and routing

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Huge Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Excellent audio routing and mixing capabilities
- 🚀 Powerful and flexible workflow
- 💡 Seamless integration with AUv3 and IAA apps
- 👍 Intuitive and clean user interface
- 👍 Reliable and stable performance

**What reviewers complain about**

- 🐛 Occasional crashes or stability issues
- 💡 Lack of MIDI clock sync receive functionality
- 💡 Limited visual customization options (e.g. channel sizes)
- 🐛 Compatibility issues with some hardware interfaces

**Reported bugs**

- Crashes or freezes when using certain plugin combinations
- Compatibility issues with iOS 15 and newer
- Inconsistent MIDI transport controls

**Requested features**

- Add MIDI clock sync receive capability
- Implement a timeline/sequencer view
- Provide more visual customization options
- Improve support for external hardware integration


## Frequently asked questions

### Is KORG Module Pro free?

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

### Is AUM free?

AUM costs $24.99, and also offers in-app purchases.

### Which has better reviews, KORG Module Pro or AUM?

AUM is rated higher. KORG Module Pro averages 4.6 out of 5 from 1.2K ratings, while AUM averages 4.7 from 534 ratings.

### Do KORG Module Pro or AUM have ads?

Neither KORG Module Pro nor AUM shows ads.

### Which is updated more often, KORG Module Pro or AUM?

KORG Module Pro ships an update monthly, and AUM every 3 months. Most recently, KORG Module Pro was updated on October 24, 2026 and AUM 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.*