# GSDSP Quantum Delay vs VAPolyMkII

The clearest difference is review sentiment: GSDSP Quantum Delay at 100% against VAPolyMkII's 67%. GSDSP Quantum Delay also leads on rating (4.8 vs 4.5) and iOS requirement (12.0 vs 16.6). VAPolyMkII's advantage is update cadence (weekly vs every 5 weeks). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

GSDSP Quantum Delay holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 17 and 11 respectively. Written reviews point the same way: 100% of GSDSP Quantum Delay's written reviews are positive against 67% of VAPolyMkII's.

GSDSP Quantum Delay ships an update every 5 weeks, VAPolyMkII weekly. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | GSDSP Quantum Delay | VAPolyMkII |
| --- | --- | --- |
| Price | $14.99 | $14.99 |
| Rating | **[4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews)** | [4.5 (11 ratings)](https://appshunter.io/ios/app/vapolymkii/id6476809566/reviews) |
| Number of ratings | **17** | 11 |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Paid | Paid |
| Size | 94 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 Delay

[App page](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297)

This app offers a vintage-inspired stereo delay effect with advanced modulation, flexible filtering, and precise timing controls. It allows users to sculpt unique echo textures, from warm analog sounds to complex, evolving soundscapes.

**Highlights:** Vintage-inspired stereo delay, Deep modulation system, Flexible filtering (LPF, HPF, BPF), Precise timing controls (BPM, ms), Switchable stereo/dual mono modes, Advanced modulation sources (LFO, Random, Envelope)

**Features:** Vision Pro support

**In-app purchases:** none


### VAPolyMkII

[App page](https://appshunter.io/ios/app/vapolymkii/id6476809566)

This virtual analog synthesizer offers a 16-voice bitimbral polyphonic sound engine with two distinct filter models and extensive modulation options. It includes a built-in sequencer, various effects, and supports AudioUnit Extension for integration with DAWs. Projects can be synced across iPhone, iPad, and Mac via iCloud.

**Highlights:** 16-voice bitimbral polyphonic synthesizer, Two analog-modeled filter types, Extensive modulation capabilities, Built-in piano roll sequencer, Multiple audio effects, AudioUnit Extension (AUv3) support, iCloud Drive project syncing

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GSDSP Quantum Delay free?

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

### Is VAPolyMkII free?

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

### Which has better reviews, GSDSP Quantum Delay or VAPolyMkII?

GSDSP Quantum Delay is rated higher. GSDSP Quantum Delay averages 4.8 out of 5 from 17 ratings, while VAPolyMkII averages 4.5 from 11 ratings.

### Do GSDSP Quantum Delay or VAPolyMkII have ads?

Neither GSDSP Quantum Delay nor VAPolyMkII shows ads.

### Which is updated more often, GSDSP Quantum Delay or VAPolyMkII?

GSDSP Quantum Delay ships an update every 5 weeks, and VAPolyMkII weekly. Most recently, GSDSP Quantum Delay was updated on September 22, 2026 and VAPolyMkII on September 20, 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.*