# Zeeon synth — Analog modeling synthesizer

> Virtual analog synthesizer with circuit-modeling engine and advanced modulation. (iPhone/iPad app by BeepStreet.)

- Source: https://appshunter.io/ios/app/zeeon-synth/id1230960440 (this page in markdown: same URL + `.md`)
- Developer: [BeepStreet](https://appshunter.io/developer/321412321)
- Category: Music, Entertainment
- Price: $14.99 with in-app purchases
- Rating: 4.80/5 from 209 App Store ratings · 166 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 27 MB
- Languages: American English
- Released: 2017-08-30
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/zeeon-synth/id1230960440/reviews.md

## What is Zeeon synth?

Zeeon is a virtual-analog synthesizer built on a deeply detailed circuit-modeling engine.
We’ve studied classic and modern analog synths to uncover what gives them their unmistakable character and recreated that essence with precision. The result is a unique instrument that delivers the warmth, movement, and organic depth of true hardware.
While many emulations sound flat, Zeeon breathes. Every note is alive, with tight lows and shimmering highs. All audio and modulation are processed at 176 kHz (4× oversampling) for uncompromised quality across the entire spectrum.

“Desktop-class sound engine … fidelity of this analog emulation goes beyond everything else on iOS.” – App Store review

Features

• Audio Unit v3 and standalone application with a simple polyphonic step sequencer

• Powerful modulation matrix offering self-modulation and cross-layer modulation, 8 modulation slots, 17 signal sources and 41 targets available, both from modulation modules and audio signal path. This takes Zeeon into semi-modular territory. Imagine oscillator waveform, panning, filter cutoff, resonance or LP-HP mode modulated by oscillators or another layer!

• 2 oscillators with continuously variable waveforms, hard-sync and sub-oscillator. Carefully simulated analog drift and PSU influence.

• Filter: 3 models available: Transistor ladder low pass, OTA cascade low pass and State Variable Filter with continuously variable LP-HP + BP mode. 

• 2 low frequency oscillators and envelope generators per voice.

• Overdrive: diode clipper, transistor saturation, wave folder, pre and post filter.

• Up to 2 layers per voice. Layers can modulate each other.

• Effects unit: Circuit modelled BBD chorus, bass booster, zero-delay Phaser, Stereo delay and Reverb.

• 280 presets and Tutorials bank. 3 additional banks available as IAPs.

Full manual and audio demos available at the BeepStreet website.

## Key features

- 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

## Pricing and in-app purchases

Base price: $14.99.

**One-time purchases**

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


## Chart rankings

- #195 in Top Paid · Music (US App Store)

## What do users think of Zeeon synth?

Overall sentiment: positive

**Pros**

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

**Cons**

- 🐛 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

**Commonly 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

**Most 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

## Recent user reviews (10 of 166)

All indexed reviews: https://appshunter.io/ios/app/zeeon-synth/id1230960440/reviews.md

### 4/5 — Eigentlich einer der besseren Synths...

*2026-01-24*

...aber die unregelmäßigen Abstürze wurden selbst nach Jahren nicht gefixed.

### 5/5 — Synthur 😍

*2025-11-17*

The new Synthur sound bank is truly amazing! Fortifies Zeeon‘s position as best iOS Synth app on the market (next to Blasoft‘s Viking Synth).

### 5/5 — Very playable synth, on have one wish for it

*2025-11-07*

This is probably the best scent on iOS for just getting down and playing what’s on the screen. The knobs feel fluid, design is well thought out and many other little thoughtful details make it feel less iOS like and more synth like. 

Really wish there was a dark skin for it, something a little less glaring on the eyes for playing in the night like a little more Drambo brother vibe. Would pay for that!

### 3/5 — One of the best sounding synths available for iOS…

*2025-10-08, version 1.65*

… but the version 1.65 update has unfortunately affected the app’s ability to retain patch settings. Using Zeeon as an AU in Logic Pro (macOS) the synth now reverts to the Default setting every time a Logic Pro project file is reopened. I can no longer rely on Zeeon for production with this critical bug.

### 5/5 — New update

*2025-10-01*

Thanks for the update. Seems to be running stable with no crashes so far.
Analog sound great for classic 80s and synthwave, and so deep under the hood in the mod matrix for more experimental tones. A go to workhorse synth, now that it is stable.

### 1/5 — 堀さん

*2025-09-30*

よくあるモデリングシンセ。没個性な上、音がツマラナイ。適正価格は120円。5分で消しました。iosモデリングシンセならthorをオススメします 2019年4月23日追記 久しぶりにダウンロードしたら安定度、音が大きく改善されている。音はsunrizerにPoison-202の瞬発力を足した感じ。星が4つなのは好みの問題。ハマる人は多いのでは

2025年9月　追記
最近のシンセアプリと比較すると評価出来る部分は無くなった。昔のiosシンセだと独特な雰囲気を持った物もあるが、これには全く無い。今だったら違うシンセアプリを買った方がよい。

### 5/5 — Superb Synth!

*2025-09-27*

Really think this synth has an extremely potent sound. Glad it’s still being maintained as so many plugins get forgotten. Would love it if the empty keyboard area on MacOS could be populated or removed. Also, please give Dagger some love too;)

### 4/5 — Great but crashing

*2025-09-03, version 1.64*

Could be the best all rounder analog poly synth, but it crashes a lot on iPad Pro m2 with multiple instances

### 2/5 — Work, but bad

*2025-08-09, version 1.64*

I really wanted to like this synthesizer, but it’s simply impossible to use. Randomly, it produces extremely harsh, distorted bursts of noise — so loud they clip all meters and are painful to the ears. It feels like something is broken in the audio engine, as if the plugin is unfinished or unoptimized.

As a DAW plugin, it constantly loses settings and resets patches, which completely destroys workflow. These glitches are unpredictable and make it unsafe to use for monitoring. I’ve seen other users report the same issues, so it’s not just my setup.

I bought this expecting a stable, professional tool, but in its current state, it’s a buggy and unstable product that can’t be used in any serious music production. Very disappointed.

ipad on apple silicon M2

### 5/5 — Excellent!

*2025-05-20*

well done boys

## Frequently asked questions about Zeeon synth

### What is Zeeon synth?

Zeeon is a virtual analog synthesizer that uses a detailed circuit-modeling engine to replicate the sound and character of classic hardware synthesizers. It offers a rich, organic sound with advanced modulation capabilities and multiple filter models.

### What are the key features of Zeeon synth?

Key features include a powerful modulation matrix for semi-modular sound design, two oscillators with continuously variable waveforms, three distinct filter models, a built-in effects unit with circuit-modeled effects, and support for Audio Unit v3 and standalone operation with a step sequencer.

### How much does Zeeon synth cost?

The base application is free to download and use. Additional sound banks are available for purchase as in-app purchases, allowing users to expand their preset library.

### What devices is Zeeon synth compatible with?

Zeeon synth is designed for mobile devices and supports Audio Unit v3, indicating compatibility with iOS devices that support this audio extension. A full manual and audio demos are available on the BeepStreet website for more specific compatibility information.

### What are some common use cases for Zeeon synth?

This app is ideal for creating warm, moving, and organic electronic music. It can be used for crafting basslines, leads, pads, and atmospheric textures, making it suitable for various genres of electronic music production and sound design.

## Version history (last 5 releases)

### 1.67 — 2026-06-01

- Added global tuning settings.
- Fixed a crash when using the standalone sequencer.

### 1.66 — 2025-11-07

- Added: Project Synthur bank (free) with 144 presets.
- The preset browser displays only tagged presets when tags are enabled.

### 1.65 — 2025-09-17

- Fixed: Stability issues in some DAWs.

### 1.64 — 2023-05-18

- Improved AUv3 parameter automation handling

### 1.63 — 2023-05-16

- Fixed: crash when host buffer size is bigger than 1024 samples.
- User interface scales to any window.

## Apps similar to Zeeon synth

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sunrizer synth](https://appshunter.io/ios/app/sunrizer-synth/id443663267) | 4.7 (183) | $12.99 | Music |
| [AudioKit Synth One Synthesizer](https://appshunter.io/ios/app/audiokit-synth-one-synthesizer/id1371050497) | 4.9 (26,818) | Free | Music |
| [NERD Synth A2x + AUv3](https://appshunter.io/ios/app/nerd-synth-a2x-plus-auv3/id6478898564) | 4.9 (1,342) | $5.99 | Music |
| [Lorentz - AUv3 Plug-in Synth](https://appshunter.io/ios/app/lorentz-auv3-plug-in-synth/id1016055431) | 4.8 (24) | $8.00 | Music |
| [Mersenne - AUv3 Plug-in Synth](https://appshunter.io/ios/app/mersenne-auv3-plug-in-synth/id1084197093) | 4.7 (28) | $8.00 | Music |
| [Nambu - AUv3 Plug-in Synth](https://appshunter.io/ios/app/nambu-auv3-plug-in-synth/id1624422460) | 4.8 (48) | $16.00 | Music |

## More apps by BeepStreet

- [iSequence HD](https://appshunter.io/ios/app/isequence-hd/id369873168)
- [GyroSynth](https://appshunter.io/ios/app/gyrosynth/id386527164)
- [Sunrizer synth](https://appshunter.io/ios/app/sunrizer-synth/id443663267)
- [Impaktor](https://appshunter.io/ios/app/impaktor/id557824278)
- [DerVoco](https://appshunter.io/ios/app/dervoco/id1391057304)

All apps by BeepStreet: https://appshunter.io/developer/321412321

## Related topics

[analog synth](https://appshunter.io/ios/topics/analog-synth)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*