# Stereo Delay vs GSDSP Quantum Delay

The clearest difference is price: Stereo Delay at $2.99 against GSDSP Quantum Delay's $14.99. Stereo Delay also leads on chart position (#195 vs unranked) and iOS requirement (10.3 vs 12.0). GSDSP Quantum Delay's advantage is review sentiment (100% vs 75%) and update cadence (every 5 weeks vs every 6 months). On rating, ads, in-app purchases and monetization model there is nothing between them.

Stereo Delay costs $2.99 and GSDSP Quantum Delay $14.99 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 — 4.8 for Stereo Delay against 4.8 for GSDSP Quantum Delay. Both are backed by a comparable volume of ratings — 5 and 17 respectively. Written reviews are what separate them: 75% of Stereo Delay's written reviews are positive against 100% of GSDSP Quantum Delay's.

Stereo Delay ships an update every 6 months, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on September 11, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Stereo Delay | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$2.99** | $14.99 |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/stereo-delay/id1444589287/reviews) | [4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews) |
| Number of ratings | 5 | **17** |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | **#195** | — |
| Size | 2 MB | 94 MB |
| Requires iOS | **10.3** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Mangoo Consulting Company Limited](https://appshunter.io/developer/1475107602) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Stereo Delay

[App page](https://appshunter.io/ios/app/stereo-delay/id1444589287)

**Currently charting:** #195 Top Paid · Music (US App Store)

This audio unit plugin creates natural-sounding stereo delays with unique panning that expands stereo width without sounding repetitive. It features filters and a mixing matrix for dynamic echo placement, ideal for adding depth to music.

**Highlights:** Unique stereo panning matrix, Natural, moving stereo echo, Low-cut and hi-cut filters, Feedback control, LFO controlled pan, Requires host app

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Stereo Delay free?

Stereo Delay costs $2.99, with no in-app purchases.

### Is GSDSP Quantum Delay free?

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

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

Stereo Delay and GSDSP Quantum Delay are both rated 4.8 out of 5 on the App Store, from 5 and 17 ratings respectively.

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

Neither Stereo Delay nor GSDSP Quantum Delay shows ads.

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

Stereo Delay ships an update every 6 months, and GSDSP Quantum Delay every 5 weeks. Most recently, Stereo Delay was updated on September 11, 2026 and GSDSP Quantum Delay on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*