# KORG iM1 vs Zeeon synth

The clearest difference is price: Zeeon synth at $14.99 against KORG iM1's $29.99. Zeeon synth also leads on update cadence (every 2 months vs every 7 months). KORG iM1's advantage is ratings volume (1K vs 209) and iOS requirement (12.0 vs 15.6). On rating, review sentiment, ads and in-app purchases there is nothing between them.

KORG iM1 costs $29.99 and Zeeon synth $14.99 up front. KORG iM1 sells 2 one-off in-app purchases and Zeeon synth sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for KORG iM1 against 4.8 for Zeeon synth. Both are backed by a comparable volume of ratings — 1K and 209 respectively. Written reviews are what separate them: 82% of KORG iM1's written reviews are positive against 76% of Zeeon synth's.

KORG iM1 ships an update every 7 months, Zeeon synth every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KORG iM1 | Zeeon synth |
| --- | --- | --- |
| Price | $29.99 | **$14.99** |
| Rating | [4.7 (1K ratings)](https://appshunter.io/ios/app/korg-im1/id966030326/reviews) | **[4.8 (209 ratings)](https://appshunter.io/ios/app/zeeon-synth/id1230960440/reviews)** |
| Number of ratings | **1K** | 209 |
| Positive reviews | **81.5% of reviews** | 76.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 200 MB | 27 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KORG INC.](https://appshunter.io/developer/363714046) | [BeepStreet](https://appshunter.io/developer/321412321) |

## What reviewers say

### KORG iM1

[App page](https://appshunter.io/ios/app/korg-im1/id966030326)

This app faithfully reproduces the legendary M1 synthesizer, offering its iconic sounds and expanded features for modern music creation. It provides a vast library of presets and intuitive performance tools, making it accessible to both experienced musicians and beginners.

**Highlights:** Faithful reproduction of original M1 sound, Expanded filter resonance and 18 effects, Gigantic library of 3,300 sounds, Intuitive KAOSS pad for performance, Smart Sound Browser for quick sound selection, Compatible with KORG Gadget

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| M1 Cards Pack | $4.99 | one-time |
| T1 Cards Pack | $4.99 | one-time |

**What reviewers like**

- 👍 Authentic M1 sound reproduction
- 💰 Great value for money
- 🎹 Faithful recreation of the original hardware
- 🎨 Powerful sound customization options
- 🔗 Works well with MIDI controllers

**What reviewers complain about**

- 🐛 Occasional crashes or stability issues
- 🔇 Low output volume compared to other apps
- 🤔 Confusing UI for patch editing and saving
- 🔴 Missing AUv3 support for integration with DAWs

**Reported bugs**

- Disappearing or missing purchased sound cards
- Bluetooth MIDI connectivity issues
- Compatibility problems with certain iOS versions or devices

**Requested features**

- Add AUv3 support for better DAW integration
- Improve preset management and saving capabilities
- Increase master volume control options
- Expand sound library with more cards/expansions


### 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


## Frequently asked questions

### Is KORG iM1 free?

KORG iM1 costs $29.99, and also offers in-app purchases.

### Is Zeeon synth free?

Zeeon synth costs $14.99, and also offers in-app purchases.

### Which has better reviews, KORG iM1 or Zeeon synth?

Zeeon synth is rated higher. KORG iM1 averages 4.7 out of 5 from 1K ratings, while Zeeon synth averages 4.8 from 209 ratings.

### Do KORG iM1 or Zeeon synth have ads?

Neither KORG iM1 nor Zeeon synth shows ads.

### Which is updated more often, KORG iM1 or Zeeon synth?

KORG iM1 ships an update every 7 months, and Zeeon synth every 2 months. Most recently, KORG iM1 was updated on October 26, 2026 and Zeeon synth 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.*