# Surreal Machines Diffuse vs GSDSP Quantum Filter

The clearest difference is price: Surreal Machines Diffuse at $7.99 against GSDSP Quantum Filter's $14.99. GSDSP Quantum Filter's advantage is iOS requirement (12.0 vs 14). On rating, review sentiment, ratings volume and ads there is nothing between them.

Surreal Machines Diffuse costs $7.99 and GSDSP Quantum Filter $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 — 5.0 for Surreal Machines Diffuse against 5.0 for GSDSP Quantum Filter. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | Surreal Machines Diffuse | GSDSP Quantum Filter |
| --- | --- | --- |
| Price | **$7.99** | $14.99 |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/surreal-machines-diffuse/id6449301191/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews) |
| Number of ratings | **6** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 8 MB | 77 MB |
| Requires iOS | 14 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Surreal Machines](https://appshunter.io/developer/1688572197) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Surreal Machines Diffuse

[App page](https://appshunter.io/ios/app/surreal-machines-diffuse/id6449301191)

This audio effect plugin blends analog-modeled delay with classic digital reverb, allowing users to morph between the two for unique soundscapes. It offers intuitive control over smearing, echoes, and damping, inspired by vintage hardware.

**Highlights:** Analog-modeled delay, Classic digital reverb, Morphing between delay and reverb, Nonlinearities and tape-style delay, Intuitive control over smearing, echoes, damping, AUV3 plugin compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Surreal Machines Diffuse free?

Surreal Machines Diffuse costs $7.99, with no in-app purchases.

### Is GSDSP Quantum Filter free?

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

### Which has better reviews, Surreal Machines Diffuse or GSDSP Quantum Filter?

Surreal Machines Diffuse and GSDSP Quantum Filter are both rated 5.0 out of 5 on the App Store, from 6 and 3 ratings respectively.

### Do Surreal Machines Diffuse or GSDSP Quantum Filter have ads?

Neither Surreal Machines Diffuse nor GSDSP Quantum Filter shows ads.

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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.*