Comparison

Model 15 Modular Synthesizer vs ARP ODYSSEi

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

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.

Highlights
  • 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
Features
Read full description

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

Screenshots

Model 15 Modular Synthesizer4 screens
ARP ODYSSEi4 screens

Verdict

The call

The clearest difference is review sentiment: Model 15 Modular Synthesizer at 86% against ARP ODYSSEi's 65%. Model 15 Modular Synthesizer also leads on rating (4.9 vs 4.6) and update cadence (every 3 months vs every 8 months). ARP ODYSSEi's advantage is iOS requirement (9.3 vs 12.4). On price, ratings volume, 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 ARP ODYSSEi $29.99 up front. Model 15 Modular Synthesizer sells 10 one-off in-app purchases and ARP ODYSSEi sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Model 15 Modular Synthesizer holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 898 and 336 respectively. Written reviews point the same way: 86% of Model 15 Modular Synthesizer's written reviews are positive against 65% of ARP ODYSSEi's.

UpkeepUpdate frequency

Model 15 Modular Synthesizer ships an update every 3 months, ARP ODYSSEi every 8 months. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 6 level
Model 15 Modular Synthesizer versus ARP ODYSSEi: the parameters behind the verdict, then further details
ParameterModel 15 Modular SynthesizerARP ODYSSEi
Price$29.99$29.99
Rating4.9 (898 ratings) — better4.6 (336 ratings)
Positive reviews86.5% of reviews — better64.9% of reviews
Number of ratings898 — better336
Update frequencyEvery 3 months — betterEvery 8 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS12.49.3 — better
Further details — not scored
Size857 MB222 MB
Age rating4+4+
DeveloperMoog Music Inc.KORG INC.

Customer experience

Model 15 Modular Synthesizer

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

ARP ODYSSEi

All ratings332 ratings
Positive90.1%
Neutral3.9%
Negative6.0%
Written reviews251 reviews
Positive64.9%
Neutral12.0%
Negative23.1%

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

ARP ODYSSEi

From 336 App Store ratings

What 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

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

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

In-app purchases

10 purchases

Model 15 Modular Synthesizer

One-time10
  • Symbiotic EquationsFree
  • Synthesist ToolkitFree
  • Sonic Mayhem$2.99
Show 7 more
  • 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
2 purchases

ARP ODYSSEi

One-time2
  • Odyssey Rev1$4.99
  • Odyssey Rev2$4.99

Questions

Is Model 15 Modular Synthesizer free?
Model 15 Modular Synthesizer costs $29.99, and also offers in-app purchases.
Is ARP ODYSSEi free?
ARP ODYSSEi costs $29.99, and also offers in-app purchases.
Which has better reviews, Model 15 Modular Synthesizer or ARP ODYSSEi?
Model 15 Modular Synthesizer is rated higher. Model 15 Modular Synthesizer averages 4.9 out of 5 from 898 ratings, while ARP ODYSSEi averages 4.6 from 336 ratings.
Do Model 15 Modular Synthesizer or ARP ODYSSEi have ads?
Neither Model 15 Modular Synthesizer nor ARP ODYSSEi shows ads.
Which is updated more often, Model 15 Modular Synthesizer or ARP ODYSSEi?
Model 15 Modular Synthesizer ships an update every 3 months, and ARP ODYSSEi every 8 months. Most recently, Model 15 Modular Synthesizer was updated on November 6, 2026 and ARP ODYSSEi on November 8, 2026.

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