# iProphet Synthesizer vs Model 15 Modular Synthesizer

The clearest difference is review sentiment: Model 15 Modular Synthesizer at 86% against iProphet Synthesizer's 34%. Model 15 Modular Synthesizer also leads on rating (4.9 vs 3.5) and ratings volume (898 vs 32). iProphet Synthesizer's advantage is price ($9.99 vs $29.99) and in-app purchases (none vs 10). On update cadence and ads there is nothing between them.

iProphet Synthesizer costs $9.99 and Model 15 Modular Synthesizer $29.99 up front. Model 15 Modular Synthesizer sells 10 one-off in-app purchases. iProphet Synthesizer asks for nothing beyond the download.

Model 15 Modular Synthesizer holds the better App Store score, 4.9 against 3.5. That said, the two scores are not equally well evidenced: Model 15 Modular Synthesizer has 898 ratings behind it against 32, so its average is the more settled of the two. Written reviews point the same way: 34% of iProphet Synthesizer's written reviews are positive against 86% of Model 15 Modular Synthesizer's.

iProphet Synthesizer ships an update every 5 months, Model 15 Modular Synthesizer every 3 months. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | iProphet Synthesizer | Model 15 Modular Synthesizer |
| --- | --- | --- |
| Price | **$9.99** | $29.99 |
| Rating | [3.5 (32 ratings)](https://appshunter.io/ios/app/iprophet-synthesizer/id898449685/reviews) | **[4.9 (898 ratings)](https://appshunter.io/ios/app/model-15-modular-synthesizer/id1041465860/reviews)** |
| Number of ratings | 32 | **898** |
| Positive reviews | 34.0% of reviews | **86.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | — | **#91** |
| Size | 85 MB | 857 MB |
| Requires iOS | **8.0** | 12.4 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Arturia](https://appshunter.io/developer/549089551) | [Moog Music Inc.](https://appshunter.io/developer/396776421) |

## What reviewers say

### iProphet Synthesizer

[App page](https://appshunter.io/ios/app/iprophet-synthesizer/id898449685)

This app emulates the classic Sequential Circuits Prophet VS synthesizer, offering its unique digital sound. Sculpt sounds with four digital oscillators, a multimode filter, and extensive modulation options. It includes over 500 presets and integrates with other music production tools.

**Highlights:** Vector screen with joysticks, Modulation Matrix, 3 DSP effects, 96 waveforms, 4 filter types, Vector envelope, Unison/detune

**In-app purchases:** none

**What reviewers like**

- 🎵 Authentic Prophet VS sound quality and character
- 🎹 Deep modulation matrix with vector synthesis capabilities
- 🎚️ Extensive preset library with diverse sounds
- 🎨 Intuitive visual interface and design
- 💰 Affordable price point for feature set

**What reviewers complain about**

- 🐛 Persistent audio distortion and crackling issues
- 🐛 Frequent crashes and app freezes
- 🔌 Poor inter-app audio (IAA) and Audiobus integration
- 🔋 Excessive battery drain in background
- ⚠️ Abandoned by developer with no updates

**Reported bugs**

- Audio distortion and crackling in all presets
- App crashes on iOS 14+ versions
- Inter-app audio (IAA) connection requires multiple restarts
- Preset changes cause app freezes and audio cutouts
- Stuck and hanging notes when sliding on keyboard

**Requested features**

- AUv3 plugin support for Logic Pro and other DAWs
- Ability to save custom patches and presets
- Velocity and aftertouch MIDI support
- MIDI control for joystick parameter
- User-defined waveform creation


### Model 15 Modular Synthesizer

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

**Currently charting:** #91 Top Paid · Music (US App Store)

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


## Frequently asked questions

### Is iProphet Synthesizer free?

iProphet Synthesizer costs $9.99, with no in-app purchases.

### Is Model 15 Modular Synthesizer free?

Model 15 Modular Synthesizer costs $29.99, and also offers in-app purchases.

### Which has better reviews, iProphet Synthesizer or Model 15 Modular Synthesizer?

Model 15 Modular Synthesizer is rated higher. iProphet Synthesizer averages 3.5 out of 5 from 32 ratings, while Model 15 Modular Synthesizer averages 4.9 from 898 ratings.

### Do iProphet Synthesizer or Model 15 Modular Synthesizer have ads?

Neither iProphet Synthesizer nor Model 15 Modular Synthesizer shows ads.

### Which is updated more often, iProphet Synthesizer or Model 15 Modular Synthesizer?

iProphet Synthesizer ships an update every 5 months, and Model 15 Modular Synthesizer every 3 months. Most recently, iProphet Synthesizer was updated on November 6, 2026 and Model 15 Modular Synthesizer on November 11, 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.*