# Stellr vs GSDSP Quantum Delay

The clearest difference is price: Stellr at $4.99 against GSDSP Quantum Delay's $14.99. GSDSP Quantum Delay's advantage is rating (4.8 vs 3.4) and review sentiment (100% vs 67%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Stellr costs $4.99 and GSDSP Quantum Delay $14.99 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 3.4. Both are backed by a comparable volume of ratings — 9 and 16 respectively. Written reviews point the same way: 67% of Stellr's written reviews are positive against 100% of GSDSP Quantum Delay's.

Stellr ships an update every 40 months, GSDSP Quantum Delay every 6 weeks. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Stellr | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$4.99** | $14.99 |
| Rating | [3.4 (9 ratings)](https://appshunter.io/ios/app/stellr/id1448350913/reviews) | **[4.8 (16 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews)** |
| Number of ratings | 9 | **16** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 6 weeks** |
| Monetization | Paid | Paid |
| Size | 26 MB | 94 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BACKPULLVER SOFTWARE LTD OOD](https://appshunter.io/developer/1035157788) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Stellr

[App page](https://appshunter.io/ios/app/stellr/id1448350913)

Create deep, ethereal ambiance with a pitch-shifter, dual delays, and reverb. Explore sonic possibilities with 15 presets, randomization, and parameter automation. Enhance your music with a new dimension of sound.

**Highlights:** Pitch shifter with fine-tuning or semitone snap, Two independent delays for complex feedback, LFO modulation and various reverb types, Pre-gain and dry/wet level control, Audio Unit Extension, Audiobus, Inter-App Audio support, 15 built-in presets with import/export, Realtime frequency spectrum visualizer

**Features:** macOS Compatibility

**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 Stellr free?

Stellr costs $4.99, 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, Stellr or GSDSP Quantum Delay?

GSDSP Quantum Delay is rated higher. Stellr averages 3.4 out of 5 from 9 ratings, while GSDSP Quantum Delay averages 4.8 from 16 ratings.

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

Neither Stellr nor GSDSP Quantum Delay shows ads.

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

Stellr ships an update every 40 months, and GSDSP Quantum Delay every 6 weeks. Most recently, Stellr was updated on October 19, 2026 and GSDSP Quantum Delay on October 25, 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.*