# GSDSP Quantum Delay vs sub808

The clearest difference is review sentiment: GSDSP Quantum Delay at 100% against sub808's 0%. GSDSP Quantum Delay also leads on rating (4.8 vs 4.2) and update cadence (every 5 weeks vs every 6 months). sub808's advantage is price ($9.99 vs $14.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

GSDSP Quantum Delay costs $14.99 and sub808 $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP Quantum Delay holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 17 and 10 respectively. Written reviews point the same way: 100% of GSDSP Quantum Delay's written reviews are positive against 0% of sub808's.

GSDSP Quantum Delay ships an update every 5 weeks, sub808 every 6 months. The most recent releases landed on September 22, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | GSDSP Quantum Delay | sub808 |
| --- | --- | --- |
| Price | $14.99 | **$9.99** |
| Rating | **[4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews)** | [4.2 (10 ratings)](https://appshunter.io/ios/app/sub808/id6475637520/reviews) |
| Number of ratings | **17** | 10 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 months |
| Monetization | Paid | Paid |
| Size | 94 MB | 150 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [OSC Audio](https://appshunter.io/developer/1693533681) |

## What reviewers say

### 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


### sub808

[App page](https://appshunter.io/ios/app/sub808/id6475637520)

Create powerful sub-bass sounds with this intuitive instrument app. Explore analog-inspired flavors, fine-tune saturation, and sculpt your basslines with versatile envelope and shaper controls. Compatible across devices for seamless production.

**Highlights:** 50 Factory Presets, 4 Analog Flavors, 8 Saturation Modes, Filter Cutoff & Glide, Handcrafted Envelope & Shaper, Cross-platform Compatibility

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GSDSP Quantum Delay free?

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

### Is sub808 free?

sub808 costs $9.99, with no in-app purchases.

### Which has better reviews, GSDSP Quantum Delay or sub808?

GSDSP Quantum Delay is rated higher. GSDSP Quantum Delay averages 4.8 out of 5 from 17 ratings, while sub808 averages 4.2 from 10 ratings.

### Do GSDSP Quantum Delay or sub808 have ads?

Neither GSDSP Quantum Delay nor sub808 shows ads.

### Which is updated more often, GSDSP Quantum Delay or sub808?

GSDSP Quantum Delay ships an update every 5 weeks, and sub808 every 6 months. Most recently, GSDSP Quantum Delay was updated on September 22, 2026 and sub808 on September 7, 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.*