# sinusedo vs GSDSP Quantum Delay

The clearest difference is price: sinusedo at $3.99 against GSDSP Quantum Delay's $14.99. sinusedo also leads on update cadence (weekly vs every 5 weeks). GSDSP Quantum Delay's advantage is iOS requirement (12.0 vs 15.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

sinusedo costs $3.99 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 — 4.7 for sinusedo against 4.8 for GSDSP Quantum Delay. Both are backed by a comparable volume of ratings — 7 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

sinusedo ships an update weekly, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on September 28, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | sinusedo | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$3.99** | $14.99 |
| Rating | [4.7 (7 ratings)](https://appshunter.io/ios/app/sinusedo/id6444181090/reviews) | **[4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews)** |
| Number of ratings | 7 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 11 MB | 94 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexey Nadzharov](https://appshunter.io/developer/729549192) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### sinusedo

[App page](https://appshunter.io/ios/app/sinusedo/id6444181090)

This app is a versatile sinewave synthesizer available as a standalone application and AUv3 plugin. It offers two independent keyboards with extensive control over note parameters, polyphony, and modulation, supporting MIDI input for external control.

**Highlights:** Dual independent keyboards, Microtonal tuning, Ring modulator per voice, Adjustable polyphony (up to 144 voices), MIDI input support, Note deviation display (cents), Glide and velocity control

**Features:** Vision Pro support

**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 sinusedo free?

sinusedo costs $3.99, 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, sinusedo or GSDSP Quantum Delay?

GSDSP Quantum Delay is rated higher. sinusedo averages 4.7 out of 5 from 7 ratings, while GSDSP Quantum Delay averages 4.8 from 17 ratings.

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

Neither sinusedo nor GSDSP Quantum Delay shows ads.

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

sinusedo ships an update weekly, and GSDSP Quantum Delay every 5 weeks. Most recently, sinusedo was updated on September 28, 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.*