ARP ODYSSEi vs Zeeon synth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ARP ODYSSEi
Experience the iconic ARP analog synthesizer sound on your mobile device. This app faithfully reproduces the classic hardware with enhanced features like polyphony and built-in effects. Explore new sonic possibilities with its advanced arpeggiator and optional design revisions.
- Faithful circuit modeling of ARP ODYSSEY
- Polyphony and chord playing
- Programmable step sequencer arpeggiator
- Built-in effects
- Optional design revisions (Rev1, Rev2, Rev3)
- Integration with KORG Gadget
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The legendary ARP sound, exquisitely reproduced in software. ARP ODYSSEi - A mobile analog synthesizer for iOS. The ARP Odyssey of 1972 has earned an unshakable position as a classic analog synthesizer. In 2015, KORG produced the ARP ODYSSEY, a complete reproduction of the original. The ARP genes that shook the worldwide music scene are being passed on, and its history continues. The next platform for the ARP ODYSSEY is iOS. We want the unforgettable ARP sound to be easily available on a device that as many as possible of today's players can obtain; this resulted in the "ARP ODYSSEi" app for iPad / iPhone. Based on the revived ARP ODYSSEY, we used KORG's proprietary CMT circuit modeling technology to reproduce the analog feeling and sound of the original as closely as possible. We've also given it numerous enhancements that are possible only with software, such as long-awaited polyphony and built-in effects. The real analog ARP ODYSSEY, and now the uniquely evolved ARP ODYSSEi, brings the universal fascination and inimitable sound to every device. * Due to differences in CPU speed of iPads / iPhones, iPad 3rd gen/2/iPad mini/iPhone 4s are not supported, only iPad Air/iPhone 5s or later is recommended. [ Features ] - Faithfully models the circuit of the ARP ODYSSEY: The circuitry has been reproduced using KORG's proprietary CMT (Component Modeling Technology), developed over the years starting with the KORG Legacy Collection. - New functions to create all-new ARP sounds: Added a voice assign mode that allows you to play chords, an arpeggiator that can be programmed in detail like a step sequencer, and effects that can transform the sound in diverse ways. - Get all three of the sought-after revisions: In addition to the standard design of the Rev3 with its black panel and orange silk-screening, you can optionally obtain the white-paneled Rev1 and the black-paneled gold silk-screened Rev2 designs, together with fifty new preset sounds that take advantage of the distinctive filters of those models. - Produce music together with KORG Gadget: ARP ODYSSEi can be used in conjunction with the "KORG Gadget" music production DAW app that has won numerous awards around the world. If both apps are installed, it can be used as the "Lexington" gadget inside the KORG Gadget app. More info at korg.com
Zeeon synth
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.
- 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
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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.
Screenshots
Verdict
The clearest difference is price: Zeeon synth at $14.99 against ARP ODYSSEi's $29.99. Zeeon synth also leads on update cadence (every 2 months vs every 8 months) and rating (4.8 vs 4.6). ARP ODYSSEi's advantage is iOS requirement (9.3 vs 15.6). On ratings volume, ads, in-app purchases and monetization model 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
ARP ODYSSEi costs $29.99 and Zeeon synth $14.99 up front. ARP ODYSSEi 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.
Zeeon synth holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 332 and 209 respectively. Written reviews point the same way: 65% of ARP ODYSSEi's written reviews are positive against 76% of Zeeon synth's.
ARP ODYSSEi ships an update every 8 months, Zeeon synth every 2 months. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.
| Parameter | ARP ODYSSEi | Zeeon synth |
|---|---|---|
| Price | $29.99 | $14.99 — better |
| Rating | 4.6 (332 ratings) | 4.8 (209 ratings) — better |
| Positive reviews | 64.9% of reviews | 75.9% of reviews — better |
| Number of ratings | 332 — better | 209 |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 15.6 |
| Further details — not scored | ||
| Size | 222 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | KORG INC. | BeepStreet |
Customer experience
ARP ODYSSEi
Zeeon synth
User reviews
ARP ODYSSEi
From 332 App Store ratingsWhat we love
- 🎨 Faithful recreation of the original ARP Odyssey
- 👍 Great sound quality and accurate emulation
- 🎹 Polyphonic and duophonic capabilities
- 🔊 Impressive built-in effects and sequencer
- 💻 Works well as a standalone app and within Gadget
Room to improve
- 🔧 Lack of MIDI implementation (no program change, MIDI learn)
- 🔀 Issues with tuning and pitch tracking, especially in Gadget
- 🔒 No AUv3 support, limiting integration with other apps
- 📱 Small controls and interface can be difficult on smaller devices
- 🔋 CPU-intensive, causing performance issues on some devices
Zeeon synth
From 209 App Store ratingsWhat we love
- 🎨 Excellent sound quality
- 🎹 Intuitive and well-designed interface
- 🔧 Flexible and deep sound design capabilities
- 💻 Seamless integration as an AUv3 plugin
- 🎚️ Smooth and responsive controls
Room to improve
- 🐛 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
Bugs and requests
ARP ODYSSEi
Reported bugs
3 issues- Crashes when trying to import user presets
- Disappearing sound issues
- Arpeggiator not working correctly within Gadget
Requested features
5 requests- Add AUv3 support for better DAW integration
- Implement MIDI learn and program change functionality
- Improve tuning and pitch tracking, especially in Gadget
- Optimize performance and reduce CPU usage
- Provide larger UI controls and better support for larger iPad screens
Zeeon synth
Reported bugs
4 issues- 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
5 requests- 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
In-app purchases
ARP ODYSSEi
- Odyssey Rev1$4.99
- Odyssey Rev2$4.99
Zeeon synth
- OI - Exploration Vol. 1$3.99
- BB Z-Space$4.99
- BB Synthwave$4.99








