# Phase Monkey vs GSDSP Quantum Delay

The clearest difference is price: Phase Monkey at $5.99 against GSDSP Quantum Delay's $14.99. Phase Monkey also leads on update cadence (weekly vs every 5 weeks). GSDSP Quantum Delay's advantage is review sentiment (100% vs 71%) and iOS requirement (12.0 vs 15.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Phase Monkey costs $5.99 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 — 4.8 for Phase Monkey against 4.8 for GSDSP Quantum Delay. Both are backed by a comparable volume of ratings — 19 and 17 respectively. Written reviews are what separate them: 71% of Phase Monkey's written reviews are positive against 100% of GSDSP Quantum Delay's.

Phase Monkey ships an update weekly, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Phase Monkey | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$5.99** | $14.99 |
| Rating | [4.8 (19 ratings)](https://appshunter.io/ios/app/phase-monkey-poly-synth/id6452880369/reviews) | [4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews) |
| Number of ratings | **19** | 17 |
| Positive reviews | 71.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 15 MB | 94 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sketch Audio, LLC](https://appshunter.io/developer/1699093348) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### Phase Monkey

[App page](https://appshunter.io/ios/app/phase-monkey-poly-synth/id6452880369)

Explore a versatile digital synthesizer inspired by 1980s phase distortion technology. Create a wide range of sounds from warm pads to aggressive basses with its unique engine and eight-stage envelopes. Optimized for touch interaction, it also supports MIDI controllers and runs across Apple devices.

**Highlights:** Phase distortion synth engine, Eight-stage envelopes, Touch-first interface, AUv3 plugin support, Universal Apple purchase, MIDI controller support, iCloud preset syncing

**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 Phase Monkey free?

Phase Monkey costs $5.99, 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, Phase Monkey or GSDSP Quantum Delay?

Phase Monkey and GSDSP Quantum Delay are both rated 4.8 out of 5 on the App Store, from 19 and 17 ratings respectively.

### Do Phase Monkey or GSDSP Quantum Delay have ads?

Neither Phase Monkey nor GSDSP Quantum Delay shows ads.

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

Phase Monkey ships an update weekly, and GSDSP Quantum Delay every 5 weeks. Most recently, Phase Monkey was updated on September 23, 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.*