Comparison

KORG Module vs Vetro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KORG Module

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
Read full description

The best sounds, available to everyone. FREE version lets you experience the high-quality piano & keyboard sound. Announcing a new high-quality mobile sound module app for iOS! • KORG Module Pro (Full version): Achieved the #1 position on Ideal for performance and music production, KORG Module is a high-quality sound module app for iOS that contains a professional sound library. With just your iPad/iPhone and a MIDI keyboard such as the KORG microKEY, you can play studio-quality keyboard and grand piano sounds anywhere. FEATURE HIGHLIGHTS ● With just an iPad/iPhone and the new microKEY, you can enjoy great sound anywhere ● Stunningly high-quality piano for free. ● Customize your sound set: Available over 30 sound libraries from the Store page. ● AUv3 support ● Ultra-low latency sound engine ● Unlock additional 4 sounds by connecting Korg MIDI controllers/synthesizers. Check the details from www.korg.com/bundle. More info at https://www.korg.com/products/software/korg_module/ !

About

Vetro

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
Read full description

Vetro is a visual metronome that can synchronize automatically to a shared tempo on the network using Ableton Link protocol. Different visualization modes are included. Customize it by importing any animated GIF or Lottie animation (just drag and drop) and it will play in sync to your music. Use it in any of your devices (iPhone, iPad and macOS supported). On macOS, it can be freely resized to any window size and kept visible at all times so you are always aware of the current tempo. Blend it with your favorite apps by adjusting window opacity, and even allow mouse events to pass through so you can keep it visible while controlling the apps underneath. Use it as a visual enhancement for your recording sessions or as a new kind of metronome when practicing. Many devices can be used at the same time and they will all sync together. This may be cool when jamming! ## Features * 11 visual modes included. * 7 metronome sounds included. * Accurate timing. * Ableton Link synchronization. * Set any time signature. * Play animated GIF and Lottie animations in sync. * iPhone, iPad and macOS support. ## macOS-only features * Always visible option. * Translucent window: Adjust background and content opacity independently. * Pass-through mouse events. Keep Vetro on top of other apps without interrupting your workflow. * Automatically show/hide Vetro window when receiving Link Start/Stop commands.

Screenshots

KORG Module4 screens
Vetro4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
KORG Module versus Vetro: the parameters behind the verdict, then further details
ParameterKORG ModuleVetro
PriceFreeFree
Rating4.6 (785 ratings) — better4.0 (2 ratings)
Positive reviews51.7% of reviews — better40.0% of reviews
Number of ratings785 — better2
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better17.6
Further details — not scored
Size1.7 GB6 MB
Age rating4+4+
DeveloperKORG INC.Joan Duat

Customer experience

KORG Module

All ratings783 ratings
Positive88.6%
Neutral4.3%
Negative7.0%
Written reviews261 reviews
Positive51.7%
Neutral12.3%
Negative36.0%

Vetro

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews5 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

Bugs and requests

KORG Module

Reported bugs

4 issues
  • 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

5 requests
  • 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

Not enough reviews yet to summarise bugs or requests.

In-app purchases

21 purchases

KORG Module

One-time21
  • 7-day trial:TRITON Best selectFree
  • 7-day trial : Organ & ClavFree
  • 7-day trial : Module Perf ExpFree
Show 18 more
  • 7-day trial : Ivory GrandFree
  • 7-day trial : Ivory American DFree
  • 7-day trial:Essential CompleteFree
  • 7-day trial Hybrid 2Free
  • 7-day trial : 80s Dance PopFree
  • 7-day Trial : GENERAL 128Free
  • 7-day trial : OASYS PianoFree
  • 7-day Trial: M1 Best SelectionFree
  • 7-day Trial : Wild KitsFree
  • 7-day Trial : Neo SoulFree
  • 7-day trial : 80's E.PianoFree
  • 7-day Trial : Classic EP-88MFree
  • 7-day trial : Dreamy SynthsFree
  • Hybrid Synth Pack 2$4.99
  • Space Western$6.99
  • TRITON Best Selection$19.99
  • Module Performance Expansion$29.99
  • Essential Complete$39.99
None

Vetro

No in-app purchases

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.

Other comparisons