# Zeeon synth vs KORG iMono/Poly

The clearest difference is price: Zeeon synth at $14.99 against KORG iMono/Poly's $29.99. Zeeon synth also leads on rating (4.8 vs 4.3) and review sentiment (76% vs 62%). KORG iMono/Poly's advantage is iOS requirement (9.3 vs 15.6). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Zeeon synth costs $14.99 and KORG iMono/Poly $29.99 up front. Zeeon synth sells 3 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.

Zeeon synth holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 209 and 85 respectively. Written reviews point the same way: 76% of Zeeon synth's written reviews are positive against 62% of KORG iMono/Poly's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Zeeon synth | KORG iMono/Poly |
| --- | --- | --- |
| Price | **$14.99** | $29.99 |
| Rating | **[4.8 (209 ratings)](https://appshunter.io/ios/app/zeeon-synth/id1230960440/reviews)** | [4.3 (85 ratings)](https://appshunter.io/ios/app/korg-imonopoly/id1256218493/reviews) |
| Number of ratings | **209** | 85 |
| Positive reviews | **76.0% 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 | 27 MB | 203 MB |
| Requires iOS | 15.6 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BeepStreet](https://appshunter.io/developer/321412321) | [KORG INC.](https://appshunter.io/developer/363714046) |

## What reviewers say

### Zeeon synth

[App page](https://appshunter.io/ios/app/zeeon-synth/id1230960440)

This app is a virtual analog synthesizer that recreates the sound and feel of classic hardware. It features a detailed circuit-modeling engine, powerful modulation, and multiple filter models for rich, organic soundscapes. Explore a vast array of presets and expand your sonic palette with additional sound banks.

**Highlights:** Circuit-modeling engine, Powerful modulation matrix, Dual oscillators with variable waveforms, Multiple filter models, Built-in effects unit, Audio Unit v3 support, Polyphonic step sequencer

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OI - Exploration Vol. 1 | $3.99 | one-time |
| BB Z-Space | $4.99 | one-time |
| BB Synthwave | $4.99 | one-time |

**What reviewers like**

- 🎨 Excellent sound quality
- 🎹 Intuitive and well-designed interface
- 🔧 Flexible and deep sound design capabilities
- 💻 Seamless integration as an AUv3 plugin
- 🎚️ Smooth and responsive controls

**What reviewers complain about**

- 🐛 Stability issues, crashes on some devices
- 🔌 Compatibility problems with newer iOS versions
- 📂 Preset management could be improved
- 🔀 Lack of MIDI learn and sequencer features
- 🖥️ UI scaling issues on larger iPad displays

**Reported bugs**

- Preset settings not retained after app restart
- Synth reverts to default settings when reopening Logic Pro project
- Crashes and freezes on certain iOS 14+ devices
- Inability to access in-app purchases from within the app

**Requested features**

- Add MIDI learn functionality
- Implement a more robust preset management system
- Include a built-in sequencer with save/load capabilities
- Improve UI scaling and layout for larger iPad screens
- Provide better integration with inter-app audio and Audiobus


### 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 Zeeon synth free?

Zeeon synth costs $14.99, 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, Zeeon synth or KORG iMono/Poly?

Zeeon synth is rated higher. Zeeon synth averages 4.8 out of 5 from 209 ratings, while KORG iMono/Poly averages 4.3 from 85 ratings.

### Do Zeeon synth or KORG iMono/Poly have ads?

Neither Zeeon synth nor KORG iMono/Poly shows ads.

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

Zeeon synth ships an update every 2 months, and KORG iMono/Poly every 2 months. Most recently, Zeeon synth was updated on November 6, 2026 and KORG iMono/Poly on November 4, 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.*