# GSDSP Quantum Delay vs Dub Filter

The clearest difference is update cadence: GSDSP Quantum Delay at every 5 weeks against Dub Filter's every 15 months. Dub Filter's advantage is rating (5.0 vs 4.8). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Dub Filter holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 17 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

GSDSP Quantum Delay ships an update every 5 weeks, Dub Filter every 15 months. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GSDSP Quantum Delay | Dub Filter |
| --- | --- | --- |
| Price | $14.99 | $14.99 |
| Rating | [4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/dub-filter-high-pass/id6478895441/reviews)** |
| Number of ratings | **17** | 6 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 15 months |
| Monetization | Paid | Paid |
| Size | 94 MB | 21 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [AudioThing Ltd.](https://appshunter.io/developer/1659941236) |

## 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


### Dub Filter

[App page](https://appshunter.io/ios/app/dub-filter-high-pass/id6478895441)

This audio plugin emulates a legendary vintage high-pass filter, offering eleven frequency steps and controls for resonance, magnetism, character, dynamics, and artifacts. It includes LFO and Envelope Follower modulation sources for creative sound design.

**Highlights:** Vintage high-pass filter emulation, Eleven frequency steps, Adjustable resonance, Magnetism, Character, Dynamics, Artifacts controls, LFO modulation, Envelope Follower modulation, Standalone and AUv3 formats

**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 Dub Filter free?

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

### Which has better reviews, GSDSP Quantum Delay or Dub Filter?

Dub Filter is rated higher. GSDSP Quantum Delay averages 4.8 out of 5 from 17 ratings, while Dub Filter averages 5.0 from 6 ratings.

### Do GSDSP Quantum Delay or Dub Filter have ads?

Neither GSDSP Quantum Delay nor Dub Filter shows ads.

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

GSDSP Quantum Delay ships an update every 5 weeks, and Dub Filter every 15 months. Most recently, GSDSP Quantum Delay was updated on October 9, 2026 and Dub Filter on October 1, 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.*