# iVCS3 vs KORG iMono/Poly

The clearest difference is price: iVCS3 at $19.99 against KORG iMono/Poly's $29.99. iVCS3 also leads on rating (4.9 vs 4.3) and review sentiment (91% vs 62%). KORG iMono/Poly's advantage is iOS requirement (9.3 vs 17.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

iVCS3 costs $19.99 and KORG iMono/Poly $29.99 up front. iVCS3 sells 10 one-off in-app purchases and KORG iMono/Poly sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

iVCS3 holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 206 and 84 respectively. Written reviews point the same way: 91% of iVCS3's written reviews are positive against 62% of KORG iMono/Poly's.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | iVCS3 | KORG iMono/Poly |
| --- | --- | --- |
| Price | **$19.99** | $29.99 |
| Rating | **[4.9 (206 ratings)](https://appshunter.io/ios/app/ivcs3/id665703927/reviews)** | [4.3 (84 ratings)](https://appshunter.io/ios/app/korg-imonopoly/id1256218493/reviews) |
| Number of ratings | **206** | 84 |
| Positive reviews | **90.7% of reviews** | 62.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 107 MB | 203 MB |
| Requires iOS | 17.0 | **9.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [apeSoft](https://appshunter.io/developer/464660782) | [KORG INC.](https://appshunter.io/developer/363714046) |

## What reviewers say

### iVCS3

[App page](https://appshunter.io/ios/app/ivcs3/id665703927)

This application emulates the iconic EMS VCS3 synthesizer, a pioneering portable synthesizer from 1969. It recreates the original's unique sound generation capabilities, including its oscillators, filters, and patch matrix, allowing users to explore its distinctive sonic palette.

**Highlights:** Official EMS VCS3 emulation, Three oscillators (2 VCOs, 1 LFO), Noise generator, Voltage controlled low pass filter (VCF), Patch board matrix, Joy-stick controller, Voltage controlled spring reverb

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Red Sky Lullaby - 180 Presets | Free | one-time |
| Singe Difficile by RUST(i)K | Free | one-time |
| RUMBLE | Free | one-time |
| OLD GRIT - COLLECTION | Free | one-time |
| JEC 2018 Iconic PinkFloyd | Free | one-time |
| JEC EMS-50 | Free | one-time |
| SINAPSYA - Under The Dust | $2.99 | one-time |
| LALA - Sonic Pleasures | $3.99 | one-time |
| JEC Mega Bank | $4.99 | one-time |
| Essential EMS Modifications | $6.99 | one-time |

**What reviewers like**

- 🚀 Faithful recreation of the original
- 👍 Powerful and versatile sound
- 🎨 Gorgeous vintage interface
- 💡 Additional features beyond the original
- 🎛️ Excellent integration with MIDI and other apps

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🤔 Steep learning curve
- 🔍 Difficult to navigate the matrix

**Reported bugs**

- Presets not loading
- Crashes on iOS 15.04
- Sampler not functioning properly

**Requested features**

- Mac compatibility
- Improved preset management
- Expanded sampling capabilities


### KORG iMono/Poly

[App page](https://appshunter.io/ios/app/korg-imonopoly/id1256218493)

Experience a classic analog synthesizer reborn on iOS. This app faithfully reproduces the iconic 4VCO sound engine, offering deep sound design capabilities with virtual patches and multi-effects. Seamlessly integrate it into your music production workflow.

**Highlights:** Faithful reproduction of classic 4VCO analog synthesizer, Deep sound design with extensive modulation, Eight virtual patches for expanded sound potential, Two multi-effect units, Quick access to all synth parameters, Integration with KORG Gadget

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Expansion Factory Pack | $4.99 | one-time |

**What reviewers like**

- 🎶 Great sounding synth
- ✨ Fantastic sound quality
- 🎵 Amazing features and sounds
- 💻 Excellent for Gadget integration
- 💡 Versatile for sound design

**What reviewers complain about**

- 🔌 No AUv3 support
- 🚫 Useless without AUv3
- 💸 Waste of money without AUv3
- 📉 Low output volume
- 🤏 Small controls, difficult manipulation

**Reported bugs**

- Cannot restore expansion pack
- Cannot find store tab
- Scale selection broken
- User scale does nothing
- MIDI unstable

**Requested features**

- AUv3 support
- Adaptive Cubasis 3 AUv3
- More iMPC integration
- Transfer patches to desktop VST
- Store preset files on device/flash drive


## Frequently asked questions

### Is iVCS3 free?

iVCS3 costs $19.99, and also offers in-app purchases.

### Is KORG iMono/Poly free?

KORG iMono/Poly costs $29.99, and also offers in-app purchases.

### Which has better reviews, iVCS3 or KORG iMono/Poly?

iVCS3 is rated higher. iVCS3 averages 4.9 out of 5 from 206 ratings, while KORG iMono/Poly averages 4.3 from 84 ratings.

### Do iVCS3 or KORG iMono/Poly have ads?

Neither iVCS3 nor KORG iMono/Poly shows ads.

### Which is updated more often, iVCS3 or KORG iMono/Poly?

iVCS3 ships an update every 2 months, and KORG iMono/Poly every 2 months. Most recently, iVCS3 was updated on October 29, 2026 and KORG iMono/Poly on October 29, 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.*