# GSDSP Quantum Filter vs VAPolyQuad

The clearest difference is review sentiment: GSDSP Quantum Filter at 100% against VAPolyQuad's 0%. GSDSP Quantum Filter also leads on rating (5.0 vs 4.0) and update cadence (every 5 weeks vs every 22 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

GSDSP Quantum Filter costs $14.99 and VAPolyQuad $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP Quantum Filter holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews point the same way: 100% of GSDSP Quantum Filter's written reviews are positive against 0% of VAPolyQuad's.

GSDSP Quantum Filter ships an update every 5 weeks, VAPolyQuad every 22 months. Both last shipped on September 22, 2026.

## The numbers

| Metric | GSDSP Quantum Filter | VAPolyQuad |
| --- | --- | --- |
| Price | $14.99 | $14.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/vapolyquad/id6504518079/reviews) |
| Number of ratings | 3 | **5** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 22 months |
| Monetization | Paid | Paid |
| Size | 77 MB | 16 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### GSDSP Quantum Filter

[App page](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920)

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

**Highlights:** Analog-modelled filters, 11 filter modes, Series and parallel routing, Dynamic modulation support, Stereo and dual mono modes, MIDI control integration

**Features:** Vision Pro support

**In-app purchases:** none


### 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 GSDSP Quantum Filter free?

GSDSP Quantum Filter costs $14.99, with no in-app purchases.

### Is VAPolyQuad free?

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

### Which has better reviews, GSDSP Quantum Filter or VAPolyQuad?

GSDSP Quantum Filter is rated higher. GSDSP Quantum Filter averages 5.0 out of 5 from 3 ratings, while VAPolyQuad averages 4.0 from 5 ratings.

### Do GSDSP Quantum Filter or VAPolyQuad have ads?

Neither GSDSP Quantum Filter nor VAPolyQuad shows ads.

### Which is updated more often, GSDSP Quantum Filter or VAPolyQuad?

GSDSP Quantum Filter ships an update every 5 weeks, and VAPolyQuad every 22 months. Most recently, GSDSP Quantum Filter was updated on September 22, 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.*