# Kauldron Synthesizer vs VAPolyQuad

The clearest difference is review sentiment: Kauldron Synthesizer at 80% against VAPolyQuad's 0%. Kauldron Synthesizer also leads on rating (4.6 vs 4.0) and ratings volume (136 vs 5). VAPolyQuad's advantage is price ($3.99 vs $9.99) and update cadence (every 22 months vs every 49 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

Kauldron Synthesizer costs $9.99 and VAPolyQuad $3.99 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 4.0. That said, the two scores are not equally well evidenced: Kauldron Synthesizer has 136 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 80% of Kauldron Synthesizer's written reviews are positive against 0% of VAPolyQuad's.

Kauldron Synthesizer ships an update every 49 months, VAPolyQuad every 22 months. The most recent releases landed on October 20, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Kauldron Synthesizer | VAPolyQuad |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Rating | **[4.6 (136 ratings)](https://appshunter.io/ios/app/kauldron-synthesizer/id1292510609/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/vapolyquad/id6504518079/reviews) |
| Number of ratings | **136** | 5 |
| Positive reviews | **79.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 22 months** |
| Monetization | Paid | Paid |
| Size | 32 MB | 16 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Yonac Inc.](https://appshunter.io/developer/288670023) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### 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


### VAPolyQuad

[App page](https://appshunter.io/ios/app/vapolyquad/id6504518079)

Create rich, analog-style music with this powerful polyphonic synthesizer. Explore a vast array of sound-shaping tools, including multiple oscillators, filters, and effects. Program intricate melodies and rhythms with the built-in sequencer, and seamlessly share projects across your Apple devices.

**Highlights:** Virtual analog polyphonic synthesizer, Up to 8 voice polyphony, Four oscillators per voice, Multiple resonant filters, Built-in effects suite, 16-bar sequencer with piano roll, Audio Unit Extension (AUv3) support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kauldron Synthesizer free?

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

### Is VAPolyQuad free?

VAPolyQuad costs $3.99, with no in-app purchases.

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

Kauldron Synthesizer is rated higher. Kauldron Synthesizer averages 4.6 out of 5 from 136 ratings, while VAPolyQuad averages 4.0 from 5 ratings.

### Do Kauldron Synthesizer or VAPolyQuad have ads?

Neither Kauldron Synthesizer nor VAPolyQuad shows ads.

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

Kauldron Synthesizer ships an update every 49 months, and VAPolyQuad every 22 months. Most recently, Kauldron Synthesizer was updated on October 20, 2026 and VAPolyQuad on October 27, 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.*