# iProphet Synthesizer vs Kauldron Synthesizer

The clearest difference is review sentiment: Kauldron Synthesizer at 80% against iProphet Synthesizer's 34%. Kauldron Synthesizer also leads on rating (4.6 vs 3.5) and ratings volume (136 vs 31). iProphet Synthesizer's advantage is update cadence (every 5 months vs every 49 months) and iOS requirement (8.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

iProphet Synthesizer costs $9.99 and Kauldron Synthesizer $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kauldron Synthesizer holds the better App Store score, 4.6 against 3.5. Both are backed by a comparable volume of ratings — 31 and 136 respectively. Written reviews point the same way: 34% of iProphet Synthesizer's written reviews are positive against 80% of Kauldron Synthesizer's.

iProphet Synthesizer ships an update every 5 months, Kauldron Synthesizer every 49 months. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | iProphet Synthesizer | Kauldron Synthesizer |
| --- | --- | --- |
| Price | $9.99 | $9.99 |
| Rating | [3.5 (31 ratings)](https://appshunter.io/ios/app/iprophet-synthesizer/id898449685/reviews) | **[4.6 (136 ratings)](https://appshunter.io/ios/app/kauldron-synthesizer/id1292510609/reviews)** |
| Number of ratings | 31 | **136** |
| Positive reviews | 34.0% of reviews | **79.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 49 months |
| Monetization | Paid | Paid |
| Size | 85 MB | 32 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Arturia](https://appshunter.io/developer/549089551) | [Yonac Inc.](https://appshunter.io/developer/288670023) |

## 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


### Kauldron Synthesizer

[App page](https://appshunter.io/ios/app/kauldron-synthesizer/id1292510609)

This app combines classic analog synth warmth with AI-powered sound design. It offers intelligent preset generation, extensive modulation options, and a powerful arpeggiator for creating rich synth textures.

**Highlights:** AI-powered preset generation (SPAWN²), Analog modeling oscillators, Extensive modulation matrix, Dual XY-pads for control, Powerful arpeggiator, AUv3 plugin support, Over 900 presets

**In-app purchases:** none

**What reviewers like**

- ✨ Warm and rich sound
- 👍 Easy to use interface
- 💡 Great presets included
- 🚀 Powerful sound engine
- 🌟 High quality emulation

**What reviewers complain about**

- 🐛 Buggy AUv3 implementation
- 🔊 Shrill noise issue
- 🔇 No Bluetooth speaker support
- ⚠️ Strange behavior/no reset
- 📉 Lacks oomph/personality

**Reported bugs**

- Oscillators cannot be set to -1 octave
- Shrill noise
- No Bluetooth speaker output
- Fails to reload with Logic projects
- Cannot load into Logic Pro

**Requested features**

- Bring synths/effects to macOS
- Mac App version
- More comprehensive FX section (distortion/saturation)
- MIDI-out for arpeggiator
- Drum machine, PAD launcher, DAW


## Frequently asked questions

### Is iProphet Synthesizer free?

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

### Is Kauldron Synthesizer free?

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

### Which has better reviews, iProphet Synthesizer or Kauldron Synthesizer?

Kauldron Synthesizer is rated higher. iProphet Synthesizer averages 3.5 out of 5 from 31 ratings, while Kauldron Synthesizer averages 4.6 from 136 ratings.

### Do iProphet Synthesizer or Kauldron Synthesizer have ads?

Neither iProphet Synthesizer nor Kauldron Synthesizer shows ads.

### Which is updated more often, iProphet Synthesizer or Kauldron Synthesizer?

iProphet Synthesizer ships an update every 5 months, and Kauldron Synthesizer every 49 months. Most recently, iProphet Synthesizer was updated on October 24, 2026 and Kauldron Synthesizer on October 26, 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.*