# Crystal Synth XT vs VAPolyQuad

The clearest difference is review sentiment: Crystal Synth XT at 78% against VAPolyQuad's 0%. Crystal Synth XT also leads on price ($4.99 vs $14.99) and rating (4.9 vs 4.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Crystal Synth XT costs $4.99 and VAPolyQuad $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Crystal Synth XT holds the better App Store score, 4.9 against 4.0. Both are backed by a comparable volume of ratings — 20 and 5 respectively. Written reviews point the same way: 78% of Crystal Synth XT's written reviews are positive against 0% of VAPolyQuad's.

Crystal Synth XT ships an update every 4 months, VAPolyQuad every 22 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Crystal Synth XT | VAPolyQuad |
| --- | --- | --- |
| Price | **$4.99** | $14.99 |
| Rating | **[4.9 (20 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/vapolyquad/id6504518079/reviews) |
| Number of ratings | **20** | 5 |
| Positive reviews | **78.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 22 months |
| Monetization | Paid | Paid |
| Size | 36 MB | 16 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### Crystal Synth XT

[App page](https://appshunter.io/ios/app/crystal-synth-xt/id408288370)

Create lush, evolving soundscapes with a powerful semi-modular synthesizer for mobile devices. Explore subtractive and FM synthesis, extensive modulation, and built-in effects. Share sounds with the desktop version and connect MIDI keyboards for a full hardware synth experience.

**Highlights:** Semi-modular synthesis engine, Subtractive and FM synthesis, Extensive modulation control (>90 parameters), Multi-stage envelopes with graphical editors, Tempo-synced envelopes, LFOs, and delays, Built-in effects (chorus, flanger, echo), MIDI keyboard input and virtual MIDI support

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🎶 Fantastic sound quality
- 💡 Innovative breed function
- 🎛️ Deep sound design capabilities
- 🎹 Versatile synth
- ✨ Unique and creative sounds

**What reviewers complain about**

- 🐛 Occasional crashes
- ⚠️ Preset system issues (folders, access)
- 🐌 Outdated interface
- 🔌 Lacks AUv3 support (frequently requested)
- 🔊 Crackling/popping sounds

**Reported bugs**

- App not working, splash screen disappears
- Screen in background
- Envelope points not moving
- Breed fan not working properly
- Crashing on launch

**Requested features**

- AUv3 support
- Update to an AU3 standard
- Newer interface
- Fix breed fan access to all presets
- Fix preset system variations between devices


### 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 Crystal Synth XT free?

Crystal Synth XT costs $4.99, with no in-app purchases.

### Is VAPolyQuad free?

VAPolyQuad costs $14.99, with no in-app purchases.

### Which has better reviews, Crystal Synth XT or VAPolyQuad?

Crystal Synth XT is rated higher. Crystal Synth XT averages 4.9 out of 5 from 20 ratings, while VAPolyQuad averages 4.0 from 5 ratings.

### Do Crystal Synth XT or VAPolyQuad have ads?

Neither Crystal Synth XT nor VAPolyQuad shows ads.

### Which is updated more often, Crystal Synth XT or VAPolyQuad?

Crystal Synth XT ships an update every 4 months, and VAPolyQuad every 22 months. Most recently, Crystal Synth XT was updated on September 21, 2026 and VAPolyQuad on September 22, 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.*