# Model 15 Modular Synthesizer vs ARP ODYSSEi

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.

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.

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.

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.

## The numbers

| Metric | Model 15 Modular Synthesizer | ARP ODYSSEi |
| --- | --- | --- |
| Price | $29.99 | $29.99 |
| Rating | **[4.9 (898 ratings)](https://appshunter.io/ios/app/model-15-modular-synthesizer/id1041465860/reviews)** | [4.6 (336 ratings)](https://appshunter.io/ios/app/arp-odyssei/id1147432809/reviews) |
| Number of ratings | **898** | 336 |
| Positive reviews | **86.5% of reviews** | 64.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 857 MB | 222 MB |
| Requires iOS | 12.4 | **9.3** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Moog Music Inc.](https://appshunter.io/developer/396776421) | [KORG INC.](https://appshunter.io/developer/363714046) |

## What reviewers say

### Model 15 Modular Synthesizer

[App page](https://appshunter.io/ios/app/model-15-modular-synthesizer/id1041465860)

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:** Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Symbiotic Equations | Free | one-time |
| Synthesist Toolkit | Free | one-time |
| Sonic Mayhem | $2.99 | one-time |
| Sinfonietta Sintesi | $2.99 | one-time |
| Psychotropic Synthesis | $2.99 | one-time |
| Alien Systems | $3.99 | one-time |
| Textural Points | $4.99 | one-time |
| Mid-Century Moog | $4.99 | one-time |
| Dynamic Drones | $4.99 | one-time |
| Mercurial Strategies | $5.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


### ARP ODYSSEi

[App page](https://appshunter.io/ios/app/arp-odyssei/id1147432809)

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:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Odyssey Rev1 | $4.99 | one-time |
| Odyssey Rev2 | $4.99 | one-time |

**What reviewers like**

- 🎨 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

**What reviewers complain about**

- 🔧 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

**Reported bugs**

- Crashes when trying to import user presets
- Disappearing sound issues
- Arpeggiator not working correctly within Gadget

**Requested features**

- 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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*