# GSDSP Quantum Filter vs VAMonoMkII

GSDSP Quantum Filter and VAMonoMkII both sit at 5.0 stars, but that hides the real split: 100% of GSDSP Quantum Filter's written reviews are positive against 0% of VAMonoMkII's. GSDSP Quantum Filter also leads on update cadence (every 5 weeks vs every 11 months) and iOS requirement (12.0 vs 16.6). VAMonoMkII's advantage is price ($5.99 vs $14.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.

GSDSP Quantum Filter costs $14.99 and VAMonoMkII $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for GSDSP Quantum Filter against 5.0 for VAMonoMkII. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews are what separate them: 100% of GSDSP Quantum Filter's written reviews are positive against 0% of VAMonoMkII's.

GSDSP Quantum Filter ships an update every 5 weeks, VAMonoMkII every 11 months. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | GSDSP Quantum Filter | VAMonoMkII |
| --- | --- | --- |
| Price | $14.99 | **$5.99** |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/vamonomkii/id6502985768/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 11 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


### VAMonoMkII

[App page](https://appshunter.io/ios/app/vamonomkii/id6502985768)

This app is a virtual analog bitimbral synthesizer for iOS and macOS. It offers two 8-voice synthesizers with extensive modulation, classic analog filter models, and built-in effects. Create and export music with its sequencer and audio visualization tools.

**Highlights:** Virtual analog bitimbral synthesizer, Dual oscillators with variable waveforms, Transistor Ladder and Sallen-Key filter models, Built-in effects suite (delay, reverb, chorus, etc.), 16-bar sequencer with piano roll and automation, Audio Unit Extension (AUv3) support, Ableton Link and MIDI 2.0 compatibility

**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 VAMonoMkII free?

VAMonoMkII costs $5.99, with no in-app purchases.

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

GSDSP Quantum Filter and VAMonoMkII are both rated 5.0 out of 5 on the App Store, from 3 and 4 ratings respectively.

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

Neither GSDSP Quantum Filter nor VAMonoMkII shows ads.

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

GSDSP Quantum Filter ships an update every 5 weeks, and VAMonoMkII every 11 months. Most recently, GSDSP Quantum Filter was updated on September 22, 2026 and VAMonoMkII on September 9, 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.*