# KORG Module vs Vetro

The clearest difference is rating: KORG Module at 4.6 against Vetro's 4.0. KORG Module also leads on ratings volume (785 vs 2) and review sentiment (52% vs 40%). Vetro's advantage is in-app purchases (none vs 21). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. KORG Module sells 21 one-off in-app purchases. Vetro asks for nothing beyond the download.

KORG Module holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: KORG Module has 785 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 52% of KORG Module's written reviews are positive against 40% of Vetro's.

KORG Module ships an update monthly, Vetro every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KORG Module | Vetro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (785 ratings)](https://appshunter.io/ios/app/korg-module/id1048875111/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/vetro-visual-metronome/id1637121079/reviews) |
| Number of ratings | **785** | 2 |
| Positive reviews | **51.7% of reviews** | 40.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1.7 GB | 6 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [Joan Duat](https://appshunter.io/developer/1866565344) |

## What reviewers say

### KORG Module

[App page](https://appshunter.io/ios/app/korg-module/id1048875111)

This app offers professional piano and keyboard sounds for mobile devices. The free version provides access to high-quality piano sounds, with options to unlock more sound libraries and features through in-app purchases or by connecting Korg MIDI controllers.

**Highlights:** High-quality piano and keyboard sounds, Customizable sound sets with over 30 libraries, AUv3 support, Ultra-low latency sound engine, Unlock sounds with Korg MIDI controllers

**Features:** Family Sharing

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-day trial:TRITON Best select | Free | one-time |
| 7-day trial : Organ & Clav | Free | one-time |
| 7-day trial : Module Perf Exp | Free | one-time |
| 7-day trial : Ivory Grand | Free | one-time |
| 7-day trial : Ivory American D | Free | one-time |
| 7-day trial:Essential Complete | Free | one-time |
| 7-day trial Hybrid 2 | Free | one-time |
| 7-day trial : 80s Dance Pop | Free | one-time |
| 7-day Trial : GENERAL 128 | Free | one-time |
| 7-day trial : OASYS Piano | Free | one-time |
| 7-day Trial: M1 Best Selection | Free | one-time |
| 7-day Trial : Wild Kits | Free | one-time |
| 7-day Trial : Neo Soul | Free | one-time |
| 7-day trial : 80's E.Piano | Free | one-time |
| 7-day Trial : Classic EP-88M | Free | one-time |
| 7-day trial : Dreamy Synths | Free | one-time |
| Hybrid Synth Pack 2 | $4.99 | one-time |
| Space Western | $6.99 | one-time |
| TRITON Best Selection | $19.99 | one-time |
| Module Performance Expansion | $29.99 | one-time |
| Essential Complete | $39.99 | one-time |

**What reviewers like**

- 🎹 Great sounds and interface
- 🎨 Realistic piano and organ sounds
- 💻 Works well as an AUv3 plugin
- 🔍 Helpful as a teaching tool
- 🎚️ Excellent sound quality and options

**What reviewers complain about**

- 🔁 Frequent need to restore purchases
- ⚠️ Compatibility issues with Korg hardware
- 🔒 Confusing purchase options and restrictions
- 🔋 Causes device heating issues
- 🔇 Low volume compared to other apps

**Reported bugs**

- Purchased sounds disappearing after updates
- Inability to delete individual modules to save space
- Inconsistent behavior with Bluetooth MIDI controllers
- Crashes when using certain expansion packs

**Requested features**

- Add virtual pitch bend and modulation wheels
- Improve Gadget integration and availability of IAPs
- Implement AUv3 support for better integration
- Provide a more intuitive and streamlined interface
- Add more instrument categories like brass, woodwinds, and Latin percussion


### Vetro

[App page](https://appshunter.io/ios/app/vetro-visual-metronome/id1637121079)

This app provides a visual metronome with dynamic beat synchronization via Ableton Link. It supports custom animations and works across multiple devices, enhancing practice and recording sessions.

**Highlights:** Visual metronome, Ableton Link synchronization, Custom GIF and Lottie animations, Multiple visualization modes, Cross-device support (iPhone, iPad, macOS), Adjustable time signatures

**In-app purchases:** none


## Frequently asked questions

### Is KORG Module free?

KORG Module is free to download, with in-app purchases available.

### Is Vetro free?

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

### Which has better reviews, KORG Module or Vetro?

KORG Module is rated higher. KORG Module averages 4.6 out of 5 from 785 ratings, while Vetro averages 4.0 from 2 ratings.

### Do KORG Module or Vetro have ads?

Neither KORG Module nor Vetro shows ads.

### Which is updated more often, KORG Module or Vetro?

KORG Module ships an update monthly, and Vetro every 2 months. Most recently, KORG Module was updated on October 26, 2026 and Vetro 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.*