# RealPhase vs GSDSP Quantum Delay

The clearest difference is update cadence: GSDSP Quantum Delay at every 5 weeks against RealPhase's every 14 months. GSDSP Quantum Delay also leads on ratings volume (17 vs 5). RealPhase's advantage is rating (5.0 vs 4.8). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

RealPhase holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

RealPhase ships an update every 14 months, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on September 15, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | RealPhase | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | $14.99 | $14.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/realphase/id1588403482/reviews)** | [4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews) |
| Number of ratings | 5 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 weeks** |
| Monetization | Paid | Paid |
| Size | 8 MB | 94 MB |
| Requires iOS | 12.1 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [quantovox](https://appshunter.io/developer/484686124) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### RealPhase

[App page](https://appshunter.io/ios/app/realphase/id1588403482)

This app faithfully reproduces the sound of a legendary analog phaser pedal. It offers advanced modulation options, including barberpole effects and MIDI sync, for creating complex and rhythmic phasing sounds. Visualize real-time frequency response and enjoy exceptional multirate performance.

**Highlights:** Faithful reproduction of legendary phaser pedal, Composite LFOs and parallel phaser structures, Barberpole/Shepard phasing, Rhythmic pattern creation with LFO ratios, Mid-Side modes for stereo phasing, Real-time notch filter frequency visualization, MIDI note event reception for sync

**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 RealPhase free?

RealPhase costs $14.99, 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, RealPhase or GSDSP Quantum Delay?

RealPhase is rated higher. RealPhase averages 5.0 out of 5 from 5 ratings, while GSDSP Quantum Delay averages 4.8 from 17 ratings.

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

Neither RealPhase nor GSDSP Quantum Delay shows ads.

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

RealPhase ships an update every 14 months, and GSDSP Quantum Delay every 5 weeks. Most recently, RealPhase was updated on September 15, 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.*