# Qithesizer vs GSDSP Quantum Distortion

The clearest difference is rating: GSDSP Quantum Distortion at 5.0 against Qithesizer's 4.1. GSDSP Quantum Distortion also leads on review sentiment (100% vs 77%) and iOS requirement (12.0 vs 15.0). Qithesizer's advantage is update cadence (fortnightly vs every 5 weeks) and price ($12.99 vs $14.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Qithesizer costs $12.99 and GSDSP Quantum Distortion $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP Quantum Distortion holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 11 and 10 respectively. Written reviews point the same way: 77% of Qithesizer's written reviews are positive against 100% of GSDSP Quantum Distortion's.

Qithesizer ships an update fortnightly, GSDSP Quantum Distortion every 5 weeks. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Qithesizer | GSDSP Quantum Distortion |
| --- | --- | --- |
| Price | **$12.99** | $14.99 |
| Rating | [4.1 (11 ratings)](https://appshunter.io/ios/app/qithesizer/id6444722040/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-distortion/id6476145487/reviews)** |
| Number of ratings | **11** | 10 |
| Positive reviews | 76.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 29 MB | 80 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Robkoo Information & Technologies Co., Ltd.](https://appshunter.io/developer/987892941) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Qithesizer

[App page](https://appshunter.io/ios/app/qithesizer/id6444722040)

This advanced music synthesizer combines virtual analog, wavetable, and physical modeling sound engines. It offers extensive modulation capabilities, a built-in sequencer, and on-screen keyboard for creating complex sounds.

**Highlights:** Multiple sound engines (virtual analog, wavetable, physical modeling), Extensive modulation sources and destinations, Full MIDI mapping, 16-step sequencer with pattern editor, Waveform and dynamic visualizations, On-screen keyboard

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GSDSP Quantum Distortion

[App page](https://appshunter.io/ios/app/gsdsp-quantum-distortion/id6476145487)

Explore four distinct distortion effects—Saturation, BitCrush, Ring Modulation, and Downsampling—blended and controlled via an intuitive XY pad. Shape harmonics, reduce digital resolution, introduce inharmonic motion, and create classic digital degradation for unique audio textures.

**Highlights:** Four distortion algorithms (Saturation, BitCrush, Ring Modulation, Downsampling), Intuitive XY pad for blending effects, Custom waveshaping saturation, BitWarp for tonal variation, Tunable oscillator for ring modulation, Adjustable downsampling rate and jitter, AUv3 audio effect plugin

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Qithesizer free?

Qithesizer costs $12.99, with no in-app purchases.

### Is GSDSP Quantum Distortion free?

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

### Which has better reviews, Qithesizer or GSDSP Quantum Distortion?

GSDSP Quantum Distortion is rated higher. Qithesizer averages 4.1 out of 5 from 11 ratings, while GSDSP Quantum Distortion averages 5.0 from 10 ratings.

### Do Qithesizer or GSDSP Quantum Distortion have ads?

Neither Qithesizer nor GSDSP Quantum Distortion shows ads.

### Which is updated more often, Qithesizer or GSDSP Quantum Distortion?

Qithesizer ships an update fortnightly, and GSDSP Quantum Distortion every 5 weeks. Most recently, Qithesizer was updated on October 13, 2026 and GSDSP Quantum Distortion on October 9, 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.*