Comparison

GS vs GSDSP Quantum Delay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GS

This audio plugin emulates the classic Space Echo tape delay effect for iOS devices. It aims to replicate the authentic sound and quirks of the original hardware, offering a vintage delay experience.

Highlights
  • AUv3 plugin for iOS
  • Emulates Space Echo tape delay
  • Authentic vintage sound
  • Basic controls mirroring original hardware
  • iPad platform compatibility
Read full description

Please note: this is an AUv3 plugin that can be used with compatible host Apps. GS-201 Mark II is the evolution of a project that began in 2007 with the release of the old version of GS-201, which evolved into a mark II version in 2019 and has now landed on the iPad platform. The aim is to capture the magic of the famous Space Echo tape delay and make it available to everyone. It's not an easy task, but the experience gained over the past 15 years in audio DSP development has helped us achieve a result that can sometimes fool even ourselves. This iOS version of the GS-201 Mark II contains only the basic controls found on the original Space Echo, with no additional editing parameters. If you want to eliminate tape hiss, if the tape splice glitch is bothering you, if you don't like wow and flutter, or need host tempo sync, you are definitely looking for a different plug-in. If, on the other hand, you want to relive the experience of dealing with an original Space Echo, with all its pros and cons, you are in the right place.

About

GSDSP Quantum Delay

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
Read full description

A vintage-inspired delay supercharged with deep modulation, flexible filtering, and creative timing that pushes echoes into new dimensions. Classic Delay, Reinvented Quantum Delay takes the charm of a vintage stereo delay and fuses it with our next-level modulation system. Switch between the warm character of Tape mode and the pristine clarity of Fade mode, lock to BPM (including 5-tuplets) or dial in precise times in milliseconds. Use the Fine control for subtle push-and-pull micro-timing — or modulate your delay lines in ways traditional delays could only dream of. Sculpted Echoes Shape your repeats with switchable lowpass, highpass, and bandpass filters placed directly in the feedback path. Add modulation to create evolving tones, gentle movement, or drifting, frequency-shifting echoes. From warm analog-style rolls to shimmering, swirling textures, it’s all there. Feedback with Precision Control your delay tail behavior using either traditional % feedback or our modern dB-per-second decay system — ideal for predictable, musical decay even when the feedback path becomes complex. Enable Crossfeed for classic ping-pong stereo bounce, or push into Over-Feedback to create dense, self-building echoes that drift toward infinity. Stereo or Dual Mono Every section of Quantum Delay — delay, filter, and feedback — can switch between stereo and dual mono modes. Create tight, controlled stereo images or break them apart for wide, offset, unpredictable spaces. Dual mono modulation unlocks complex stereo interplay and beautifully asymmetric echoes. Modulation Without Limits Quantum Delay integrates our advanced modulation system, letting you modulate nearly anything: delay time, filters, feedback parameters, stereo controls, and more. Use LFOs, Random Generators, 2D modulators, Envelope Followers, Macros, and even chaotic systems to push your echoes far beyond traditional delay behavior. Or use our parameter randomisation feature to explore the plugin’s sound at random. Quantum Delay is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products

Screenshots

GS1 screens
GSDSP Quantum Delay3 screens

Verdict

The call

The clearest difference is update cadence: GSDSP Quantum Delay at every 6 weeks against GS's every 17 months. GSDSP Quantum Delay also leads on rating (4.8 vs 4.5). GS's advantage is price ($11.99 vs $14.99) and iOS requirement (11.0 vs 13.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

GS costs $11.99 and GSDSP Quantum Delay $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP Quantum Delay holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 11 and 16 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

GS ships an update every 17 months, GSDSP Quantum Delay every 6 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
GS versus GSDSP Quantum Delay: the parameters behind the verdict, then further details
ParameterGSGSDSP Quantum Delay
Price$11.99 — better$14.99
Rating4.5 (11 ratings)4.8 (16 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1116 — better
Update frequencyEvery 17 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size10 MB94 MB
Age rating4+4+
DeveloperGenuine SoundwareGustav Scholda

Customer experience

GS

All ratings11 ratings
Positive81.8%
Neutral18.2%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

GSDSP Quantum Delay

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

GS

No in-app purchases

None

GSDSP Quantum Delay

No in-app purchases

Questions

Is GS free?
GS costs $11.99, 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, GS or GSDSP Quantum Delay?
GSDSP Quantum Delay is rated higher. GS averages 4.5 out of 5 from 11 ratings, while GSDSP Quantum Delay averages 4.8 from 16 ratings.
Do GS or GSDSP Quantum Delay have ads?
Neither GS nor GSDSP Quantum Delay shows ads.
Which is updated more often, GS or GSDSP Quantum Delay?
GS ships an update every 17 months, and GSDSP Quantum Delay every 6 weeks. Most recently, GS was updated on October 24, 2026 and GSDSP Quantum Delay on October 25, 2026.

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