# Harmony Voice vs KORG Module Pro

The clearest difference is price: Harmony Voice at $4.99 against KORG Module Pro's $39.99. Harmony Voice also leads on in-app purchases (none vs 20) and iOS requirement (8.0 vs 15.6). KORG Module Pro's advantage is rating (4.6 vs 2.3) and review sentiment (64% vs 33%). On ads and device support there is nothing between them.

Harmony Voice costs $4.99 and KORG Module Pro $39.99 up front. KORG Module Pro sells 20 one-off in-app purchases. Harmony Voice asks for nothing beyond the download.

KORG Module Pro holds the better App Store score, 4.6 against 2.3. That said, the two scores are not equally well evidenced: KORG Module Pro has 1.2K ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 33% of Harmony Voice's written reviews are positive against 64% of KORG Module Pro's.

Harmony Voice ships an update every 6 months, KORG Module Pro monthly. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Harmony Voice | KORG Module Pro |
| --- | --- | --- |
| Price | **$4.99** | $39.99 |
| Rating | [2.3 (24 ratings)](https://appshunter.io/ios/app/harmony-voice/id532501340/reviews) | **[4.6 (1.2K ratings)](https://appshunter.io/ios/app/korg-module-pro/id932191687/reviews)** |
| Number of ratings | 24 | **1.2K** |
| Positive reviews | 33.3% of reviews | **63.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 28 MB | 1.7 GB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Harry Gohs](https://appshunter.io/developer/382428644) | [KORG INC.](https://appshunter.io/developer/363714046) |

## What reviewers say

### Harmony Voice

[App page](https://appshunter.io/ios/app/harmony-voice/id532501340)

Create a vocal choir from your own voice with up to four harmonized parts. This app offers real-time pitch correction, automatic chord generation, and voice character modification. Enhance your singing with professional effects and easily record and export your creations.

**Highlights:** Four-part real-time harmonizer, Automatic tuning correction, Manual and automatic harmonization modes, Voice character adjustment, Hi-end reverb and chorus effects, Audio recorder with metronome, SoundCloud upload and file export

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Harmony Voice free?

Harmony Voice costs $4.99, with no in-app purchases.

### Is KORG Module Pro free?

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

### Which has better reviews, Harmony Voice or KORG Module Pro?

KORG Module Pro is rated higher. Harmony Voice averages 2.3 out of 5 from 24 ratings, while KORG Module Pro averages 4.6 from 1.2K ratings.

### Do Harmony Voice or KORG Module Pro have ads?

Neither Harmony Voice nor KORG Module Pro shows ads.

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

Harmony Voice ships an update every 6 months, and KORG Module Pro monthly. Most recently, Harmony Voice was updated on October 12, 2026 and KORG Module Pro on October 14, 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.*