# KORG Module Pro vs NERD Synth A2x + AUv3

The clearest difference is price: NERD Synth A2x + AUv3 at $5.99 against KORG Module Pro's $19.99. NERD Synth A2x + AUv3 also leads on in-app purchases (none vs 20) and review sentiment (90% vs 64%). On ratings volume, ads, chart position and device support there is nothing between them.

KORG Module Pro costs $19.99 and NERD Synth A2x + AUv3 $5.99 up front. KORG Module Pro sells 20 one-off in-app purchases. NERD Synth A2x + AUv3 asks for nothing beyond the download.

NERD Synth A2x + AUv3 holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 1.2K and 1.3K respectively. Written reviews point the same way: 64% of KORG Module Pro's written reviews are positive against 90% of NERD Synth A2x + AUv3's.

KORG Module Pro ships an update monthly, NERD Synth A2x + AUv3 fortnightly. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | KORG Module Pro | NERD Synth A2x + AUv3 |
| --- | --- | --- |
| Price | $19.99 | **$5.99** |
| Rating | [4.6 (1.2K ratings)](https://appshunter.io/ios/app/korg-module-pro/id932191687/reviews) | **[4.9 (1.3K ratings)](https://appshunter.io/ios/app/nerd-synth-a2x-plus-auv3/id6478898564/reviews)** |
| Number of ratings | 1.2K | **1.3K** |
| Positive reviews | 63.8% of reviews | **90.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#101** | #159 |
| Size | 1.7 GB | 242 MB |
| Requires iOS | 15.6 | **14.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [AudioKit Pro](https://appshunter.io/developer/1307785645) |

## What reviewers say

### KORG Module Pro

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

**Currently charting:** #101 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 |
| Wurley Electric Piano | $4.99 | one-time |
| Mellow Tape Keyboard | $4.99 | 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 |
| Organ & Clav Collection | $9.99 | one-time |
| TRITON Best Selection | $9.99 | one-time |
| 80's Electric Piano | $9.99 | one-time |
| Orchestral Dreams | $9.99 | one-time |
| Classic EP-88M | $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 |
| Ivory Mobile Grand | $14.99 | one-time |
| Module Performance Expansion | $19.99 | 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


### NERD Synth A2x + AUv3

[App page](https://appshunter.io/ios/app/nerd-synth-a2x-plus-auv3/id6478898564)

**Currently charting:** #159 Top Paid · Music (US App Store)

This virtual analog synthesizer offers a powerful and intuitive sound design experience, inspired by classic hardware. Explore over 40 classic waveforms, a versatile arpeggiator, step sequencer, and lush effects to craft unique electronic music.

**Highlights:** Virtual Analog Synthesizer, 40+ Classic Waveforms, Arpeggiator, Step Sequencer, Lush Effects Suite, Four-voice Unison, AUv3 Plugin Support

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ⭐ Outstanding synth
- 👍 Very nice and rich sounding
- 🎨 Great presets and sound design
- 🔧 Easy to use and intuitive
- 💻 Works well in AUv3 environments

**What reviewers complain about**

- 🐛 Doesn't show up in Logic
- 🔧 Needs to be more Mac-compatible
- 🔧 Changing presets can be sluggish
- 🔧 Missing aftertouch/expression support

**Reported bugs**

- Doesn't fit properly in Logic Pro for iPad
- Keyboard keys get stuck when using a controller

**Requested features**

- Dark mode option
- Undo/redo functionality
- Improved Logic Pro integration
- Ability to change color scheme


## Frequently asked questions

### Is KORG Module Pro free?

KORG Module Pro costs $19.99, and also offers in-app purchases.

### Is NERD Synth A2x + AUv3 free?

NERD Synth A2x + AUv3 costs $5.99, with no in-app purchases.

### Which has better reviews, KORG Module Pro or NERD Synth A2x + AUv3?

NERD Synth A2x + AUv3 is rated higher. KORG Module Pro averages 4.6 out of 5 from 1.2K ratings, while NERD Synth A2x + AUv3 averages 4.9 from 1.3K ratings.

### Do KORG Module Pro or NERD Synth A2x + AUv3 have ads?

Neither KORG Module Pro nor NERD Synth A2x + AUv3 shows ads.

### Which is updated more often, KORG Module Pro or NERD Synth A2x + AUv3?

KORG Module Pro ships an update monthly, and NERD Synth A2x + AUv3 fortnightly. Most recently, KORG Module Pro was updated on October 3, 2026 and NERD Synth A2x + AUv3 on October 2, 2026.

### Which is more popular, KORG Module Pro or NERD Synth A2x + AUv3?

KORG Module Pro currently peaks at #101 in the App Store charts, and NERD Synth A2x + AUv3 at #159. Chart position reflects recent download velocity rather than total install base.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*