# GSDSP Quantum Filter vs Spectrum AUv3 FFT Visualizer

The clearest difference is price: Spectrum AUv3 FFT Visualizer at $0.99 against GSDSP Quantum Filter's $14.99. GSDSP Quantum Filter's advantage is update cadence (every 5 weeks vs every 12 months) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

GSDSP Quantum Filter costs $14.99 and Spectrum AUv3 FFT Visualizer $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP Quantum Filter ships an update every 5 weeks, Spectrum AUv3 FFT Visualizer every 12 months. The most recent releases landed on September 22, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GSDSP Quantum Filter | Spectrum AUv3 FFT Visualizer |
| --- | --- | --- |
| Price | $14.99 | **$0.99** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 12 months |
| Monetization | Paid | — |
| Size | 77 MB | 10 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### 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


### Spectrum AUv3 FFT Visualizer

[App page](https://appshunter.io/ios/app/spectrum-auv3-fft-visualizer/id6737164438)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GSDSP Quantum Filter free?

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

### Is Spectrum AUv3 FFT Visualizer free?

Spectrum AUv3 FFT Visualizer costs $0.99, with no in-app purchases.

### Do GSDSP Quantum Filter or Spectrum AUv3 FFT Visualizer have ads?

Neither GSDSP Quantum Filter nor Spectrum AUv3 FFT Visualizer shows ads.

### Which is updated more often, GSDSP Quantum Filter or Spectrum AUv3 FFT Visualizer?

GSDSP Quantum Filter ships an update every 5 weeks, and Spectrum AUv3 FFT Visualizer every 12 months. Most recently, GSDSP Quantum Filter was updated on September 22, 2026 and Spectrum AUv3 FFT Visualizer 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.*