# KORG Module Pro vs KeyStage Lite

The clearest difference is price: KeyStage Lite at Free against KORG Module Pro's $39.99. KeyStage Lite also leads on in-app purchases (none vs 20) and iOS requirement (13.0 vs 15.6). KORG Module Pro's advantage is rating (4.6 vs 4.0) and ratings volume (1.2K vs 7). On review sentiment and ads there is nothing between them.

KeyStage Lite is free to download; KORG Module Pro costs $39.99 up front. KORG Module Pro sells 20 one-off in-app purchases. KeyStage Lite asks for nothing beyond the download.

KORG Module Pro holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: KORG Module Pro has 1.2K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 64% of KORG Module Pro's written reviews are positive against 60% of KeyStage Lite's.

KORG Module Pro ships an update monthly, KeyStage Lite every 3 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | KORG Module Pro | KeyStage Lite |
| --- | --- | --- |
| Price | $39.99 | **Free** |
| Rating | **[4.6 (1.2K ratings)](https://appshunter.io/ios/app/korg-module-pro/id932191687/reviews)** | [4.0 (7 ratings)](https://appshunter.io/ios/app/keystage-lite/id1437899019/reviews) |
| Number of ratings | **1.2K** | 7 |
| Positive reviews | **63.8% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1.7 GB | 61 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [Ali Gokturk](https://appshunter.io/developer/1406132633) |

## 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


### KeyStage Lite

[App page](https://appshunter.io/ios/app/keystage-lite/id1437899019)

This app acts as a master controller and audio mixer for keyboard players. It allows simultaneous control of multiple hardware and software instruments using various MIDI controllers. Organize songs into sections, customize instrument sounds, and manage MIDI mappings with advanced scripting capabilities.

**Highlights:** Control multiple MIDI controllers and instruments, Host AUv3 instruments and effects, Create complex keyboard splits and layers, Advanced MIDI mapping and scripting, Audio mixer with track control, Play and manage audio files, View PDF and JPG files

**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 KeyStage Lite free?

KeyStage Lite is free to download, with no in-app purchases.

### Which has better reviews, KORG Module Pro or KeyStage Lite?

KORG Module Pro is rated higher. KORG Module Pro averages 4.6 out of 5 from 1.2K ratings, while KeyStage Lite averages 4.0 from 7 ratings.

### Do KORG Module Pro or KeyStage Lite have ads?

Neither KORG Module Pro nor KeyStage Lite shows ads.

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

KORG Module Pro ships an update monthly, and KeyStage Lite every 3 months. Most recently, KORG Module Pro was updated on October 14, 2026 and KeyStage Lite on October 7, 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.*