Comparison

Model 15 Modular Synthesizer vs Zeeon synth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Model 15 Modular Synthesizer

This app recreates a legendary modular synthesizer for mobile devices. Explore its iconic modules, experiment with sound design, and create music with intuitive controls and advanced features.

Highlights
  • Iconic Moog module recreation
  • Monophonic and 4-voice polyphonic operation
  • Integrated Moog keyboard and ribbon controller
  • Sequencing arpeggiator
  • MIDI integration and external control
  • Looping recorder with overdubbing
  • AUv3 Audio Unit Extensions support
Features
Read full description

The Moog Model 15 App is the first Moog modular synthesizer and synthesis educational tool created exclusively for iPad, iPhone and iPod touch. Each facet of the Moog Model 15 modular synthesizer has been meticulously recreated in this application to ensure the power and transcendent sound quality of each module remains intact. The character, harmonic complexity and mystique of the Moog Model 15’s modules, from the legendary Moog 921–series oscillators and 904A Low Pass Filter, to the coveted 907 Fixed Filter Bank have been painstakingly preserved. In order to develop the most immersive and expressive modular interface possible, the Model 15 App has been designed utilizing Apple’s new Metal advanced graphics engine. This ensures that all zooming, panning and modular patching throughout the application feels completely natural, something that would have been impossible otherwise. The Model 15 App features both monophonic and 4-voice polyphonic operation is easily commanded via 4 seamlessly integrated controllers. Simple swipes and taps provide instant access to a traditional Moog keyboard, 1150 ribbon controller, 8-step sequencing arpeggiator and the award-winning Animoog keyboard with 22 built-in scales and polyphonic modulation capabilities. Also included are extended features which expand the capabilities of the app beyond the traditional offerings of the hardware Moog Model 15. These include total MIDI integration, assignment for external control, use as a MIDI controller, dedicated Audio Bridge and MIDI Bridge modules, looping recorder module with overdubbing, a master ping-pong delay module and a new extension cabinet that includes additional amplifiers and voltage-controlled reversible attenuators that can be used for effects like ring-modulation. Because the Model 15 App utilizes Apple’s Metal technology, only 64-bit devices are supported. Compatible devices include iPhone 5s or newer, iPod touch 6 or newer, iPad Air or newer, and the iPad Pro. The Model 15 App requires iOS version 12.4 or later to work. Additional Features • Ships with over 160 unique presets • Recreates the sound of a hardware Moog Model 15 modular synthesizer • Easily share presets and recordings with anyone • Tutorial patches to assist all experience levels • Intuitive patching and cable coloring • Support for landscape and portrait modes • Voltage-controlled stereo ping-pong delay • Expressive sequencing arpeggiator • Moog 1150 Ribbon controller • Real-time looping recorder with overdub and immediate sharing • Up to two controllers on-screen (iPad only) • Optional left-handed UI operation Supports • AUv3 Audio Unit Extensions • 3D Touch and Apple Pencil integration for after pressure • Note-per-channel MIDI controllers • Ableton Link • Inter-App Audio and Audiobus • MIDI Bridge and Audio Bridge • 7 and 14-Bit MIDI • MIDI Program Change • Bluetooth LE MIDI controllers • Typing keyboards for shortcuts and musical typing • AudioCopy, AudioPaste and AudioShare

About

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.

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
Read full description

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

Model 15 Modular Synthesizer4 screens
Zeeon synth3 screens

Verdict

The call

The clearest difference is price: Zeeon synth at $14.99 against Model 15 Modular Synthesizer's $29.99. Model 15 Modular Synthesizer's advantage is review sentiment (86% vs 76%) and ratings volume (898 vs 209). On rating, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Model 15 Modular Synthesizer costs $29.99 and Zeeon synth $14.99 up front. Model 15 Modular Synthesizer sells 11 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Model 15 Modular Synthesizer against 4.8 for Zeeon synth. Both are backed by a comparable volume of ratings — 898 and 209 respectively. Written reviews are what separate them: 86% of Model 15 Modular Synthesizer's written reviews are positive against 76% of Zeeon synth's.

UpkeepUpdate frequency

Model 15 Modular Synthesizer ships an update every 3 months, Zeeon synth every 2 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Model 15 Modular Synthesizer versus Zeeon synth: the parameters behind the verdict, then further details
ParameterModel 15 Modular SynthesizerZeeon synth
Price$29.99$14.99 — better
Rating4.9 (898 ratings) — better4.8 (209 ratings)
Positive reviews86.5% of reviews — better76.0% of reviews
Number of ratings898 — better209
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS12.4 — better15.6
Further details — not scored
Size857 MB27 MB
Age rating4+4+
DeveloperMoog Music Inc.BeepStreet

Customer experience

Model 15 Modular Synthesizer

All ratings896 ratings
Positive96.8%
Neutral1.7%
Negative1.6%
Written reviews480 reviews
Positive86.5%
Neutral4.0%
Negative9.6%

Zeeon synth

All ratings209 ratings
Positive93.8%
Neutral2.4%
Negative3.8%
Written reviews167 reviews
Positive76.0%
Neutral7.2%
Negative16.8%

User reviews

Model 15 Modular Synthesizer

From 898 App Store ratings

What we love

  • 🚀 Incredible sound quality
  • 👍 Authentic Moog emulation
  • 💡 Great for learning modular synthesis
  • 🎨 Beautiful and detailed interface
  • 🎹 Expressive MIDI capabilities

Room to improve

  • 🐛 Occasional crashes and glitches
  • 🔍 Difficult to navigate on smaller screens
  • 🕹️ Challenging to patch and tweak
  • 🔋 High CPU usage

Zeeon synth

From 209 App Store ratings

What 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

Model 15 Modular Synthesizer

Reported bugs

3 issues
  • Arpeggiator direction not working as expected
  • Distortion and audio issues on latest iOS versions
  • Incompatibility with certain DAWs

Requested features

5 requests
  • More in-depth tutorials
  • Ability to customize module layout
  • Zoom/overview option for entire system
  • Expanded preset library
  • Midi mapping for arpeggiator

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

11 purchases

Model 15 Modular Synthesizer

One-time11
  • Symbiotic EquationsFree
  • Synthesist ToolkitFree
  • Angular Arps$1.99
Show 8 more
  • Sonic Mayhem$2.99
  • Sinfonietta Sintesi$2.99
  • Psychotropic Synthesis$2.99
  • Alien Systems$3.99
  • Textural Points$4.99
  • Mid-Century Moog$4.99
  • Dynamic Drones$4.99
  • Mercurial Strategies$5.99
3 purchases

Zeeon synth

One-time3
  • OI - Exploration Vol. 1$3.99
  • BB Z-Space$4.99
  • BB Synthwave$4.99

Questions

Is Model 15 Modular Synthesizer free?
Model 15 Modular Synthesizer 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, Model 15 Modular Synthesizer or Zeeon synth?
Model 15 Modular Synthesizer is rated higher. Model 15 Modular Synthesizer averages 4.9 out of 5 from 898 ratings, while Zeeon synth averages 4.8 from 209 ratings.
Do Model 15 Modular Synthesizer or Zeeon synth have ads?
Neither Model 15 Modular Synthesizer nor Zeeon synth shows ads.
Which is updated more often, Model 15 Modular Synthesizer or Zeeon synth?
Model 15 Modular Synthesizer ships an update every 3 months, and Zeeon synth every 2 months. Most recently, Model 15 Modular Synthesizer was updated on October 29, 2026 and Zeeon synth on October 30, 2026.

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