# VariSpeed vs GSDSP Quantum Delay

The clearest difference is update cadence: GSDSP Quantum Delay at every 5 weeks against VariSpeed's every 41 months. GSDSP Quantum Delay also leads on device support (3 vs 1). VariSpeed's advantage is price ($11.99 vs $14.99). On rating, review sentiment, ratings volume and ads there is nothing between them.

VariSpeed costs $11.99 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 — 4.9 for VariSpeed against 4.8 for GSDSP Quantum Delay. Both are backed by a comparable volume of ratings — 8 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

VariSpeed ships an update every 41 months, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | VariSpeed | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$11.99** | $14.99 |
| Rating | **[4.9 (8 ratings)](https://appshunter.io/ios/app/varispeed/id1642813420/reviews)** | [4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews) |
| Number of ratings | 8 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 5 weeks** |
| Monetization | Paid | Paid |
| Size | 11 MB | 94 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Genuine Soundware](https://appshunter.io/developer/1560880481) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### VariSpeed

[App page](https://appshunter.io/ios/app/varispeed/id1642813420)

This app simulates a classic tape echo machine, replicating the functionality of a specific vintage hardware unit. It allows for variable delay times by altering the speed of the tape mechanism.

**Highlights:** Classic tape echo simulation, Variable delay time, AUv3 plugin compatibility, Replicates vintage hardware

**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 VariSpeed free?

VariSpeed costs $11.99, 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, VariSpeed or GSDSP Quantum Delay?

VariSpeed is rated higher. VariSpeed averages 4.9 out of 5 from 8 ratings, while GSDSP Quantum Delay averages 4.8 from 17 ratings.

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

Neither VariSpeed nor GSDSP Quantum Delay shows ads.

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

VariSpeed ships an update every 41 months, and GSDSP Quantum Delay every 5 weeks. Most recently, VariSpeed was updated on September 10, 2026 and GSDSP Quantum Delay 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.*