Comparison

ab vortEx X vs QuaDelay

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

Head to head
About

ab vortEx X

This app is a stereo-only abstract spacetime designer for creating unique reverberations. It functions as an AUv3 plugin for compatible iOS hosts or as a standalone application, offering control over sound reflection spread.

Highlights
  • Stereo-only spatial audio algorithms
  • AUv3 plugin compatibility
  • Standalone application mode
  • Touch screen interface
  • Control over sound reflection spread
  • Space, Time, Viscosity, Volumes controls
Features
Read full description

'ab vortEx X' for iOS is a 'Light', stereo-only version of 'ab vortEx', an abstract spacetime designer for creating infinite variations of reverberations using our Spatial Audio algorithms under the hood. 'ab vortEx' for iOS comes as an AUv3 Plugin and is compatible with any iOS host that supports AUv3 (e.g. Garageband). The plugin contains a minimalist interface, compatible with Touch Screens - as you move through the screen, you can control how the algorithm works and how the reflections of the sound spread through time and space. 'ab Vortex X' also works as a stand-alone application (make sure you wear headphones or use a soundcard). 'ab vortEx X' supports Stereo signals and contains the most critical controls of 'ab Vortex' (Space, Time, Viscosity and Volumes) for providing quick ways to manipulate your sound.ab vortEx' for iOS works with Mono and Stereo signals.

About

QuaDelay

This audio effect plugin creates unique stereo delay soundscapes using four independent delay lines. It offers advanced control over delay times, regeneration, modulation, and filtering for ambient and experimental audio textures. It can be used standalone or within compatible host applications.

Highlights
  • Four independent stereo delay lines
  • Adjustable delay times and ratios
  • Variable regeneration (feedback)
  • Stereo modulation effect
  • Low-pass filter for repeats
  • Integrated reverb effect
  • Standalone and AUv3 compatible
Read full description

QuaDelay Delay-Scaper (AUv3) QuaDelay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic or GarageBand. Overview QuaDelay is a stereo delay effect that uses four independent delay lines to create interesting, and sometimes mesmerising "delay-scapes". QuaDelay is not your typical ping-pong delay, so if you're looking for tempo-sync'd quarter note triplets and dotted eighths, that's not really what QuaDelay is about. If on the other hand, you're interested in creating lush and ambient delay-based effects, this might just be the delay for you! Parameters Active - Toggles the effect On or Off. Note that when you set the effect to Off, you will still hear the delay repeats, but your input signal is no longer fed into the delay processing. This is a similar idea to the "trails" feature in many delay effects units and pedals. Delay - Sets the base delay time between 100ms and 8 seconds. Other delays will be heard at different times depending on the Ratios setting. Ratios - Changes how the other three delay line times are calculated. The 2:3:4 setting is probably the most obviously rhythmic, as it's based on the formula 1-(1/x) which produces the ratios of 50, 67 and 75%. These ratios are applied to the base delay time, so for a base delay time of 1000ms, one delay will occur after 1000ms and the others at 500ms, 667ms and 750ms. The Gold and Silver Ratios calculations are based on Prime numbers and the Golden and Silver Ratio in Mathematics. These calculations are the QuaDelay "secret sauce" ! Regen - Sets the regeneration or feedback of the delay repeats up to 100% "endless" repeats. Note that at high Regen levels, the sound will appear to degrade in quality and become "washed-out" or "murky". This is intentional, and an attempt to capture the sound of analog delays with limited fidelity. Compression and limiting are also applied internally to prevent excessive build-up, which can also result in a "crunchy" sound at extreme settings as the repeats are squashed each time they're layered on top of each other. Again, this tends to be a sonic characteristic of analog and tape-based delays. Mod - Applies a variable amount of stereo modulation to the delayed sound. LPF - Sets the cutoff frequency of a lowpass filter applied to the delay repeats. Reduce the LPF control for a darker echo sound. Dry - Sets how much of the dry / incoming signal is added to the output stage, and can be muted entirely if desired. Wet - Sets the overall level of the generated delay / effect. Reverb - Applies a large-sounding stereo-tastic reverb to the combined Dry and Wet output. Adding Reverb helps "smear" the delay repeats, creating ambient washes of sounds. By setting the Wet level to zero, you can use QuaDelay as a simple reverb effect. If the name sounds familiar, QuaDelay is an improved version of the QUADELAY module developed for Voltage Modular by Waverley Instruments. For more info and support please visit: www.waverley-instruments.com/robjackson

Screenshots

ab vortEx X3 screens
QuaDelay3 screens

Verdict

The call

ab vortEx X and QuaDelay both sit at 4.6 stars, but that hides the real split: 88% of ab vortEx X's written reviews are positive against 0% of QuaDelay's. QuaDelay's advantage is price ($1.99 vs $12.99) and update cadence (every 3 days vs every 2 months). On rating, 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

ab vortEx X costs $12.99 and QuaDelay $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for ab vortEx X against 4.7 for QuaDelay. Both are backed by a comparable volume of ratings — 8 and 6 respectively. Written reviews are what separate them: 88% of ab vortEx X's written reviews are positive against 0% of QuaDelay's.

UpkeepUpdate frequency

ab vortEx X ships an update every 2 months, QuaDelay every 3 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
ab vortEx X versus QuaDelay: the parameters behind the verdict, then further details
Parameterab vortEx XQuaDelay
Price$12.99$1.99 — better
Rating4.6 (8 ratings)4.7 (6 ratings) — better
Positive reviews87.5% of reviews — better0.0% of reviews
Number of ratings8 — better6
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11 — better12.0
Further details — not scored
Size7 MB12 MB
Age rating4+4+
DeveloperAlejandro Cabrera ZunigaRob Jackson

Customer experience

ab vortEx X

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

QuaDelay

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

ab vortEx X

No in-app purchases

None

QuaDelay

No in-app purchases

Questions

Is ab vortEx X free?
ab vortEx X costs $12.99, with no in-app purchases.
Is QuaDelay free?
QuaDelay costs $1.99, with no in-app purchases.
Which has better reviews, ab vortEx X or QuaDelay?
QuaDelay is rated higher. ab vortEx X averages 4.6 out of 5 from 8 ratings, while QuaDelay averages 4.7 from 6 ratings.
Do ab vortEx X or QuaDelay have ads?
Neither ab vortEx X nor QuaDelay shows ads.
Which is updated more often, ab vortEx X or QuaDelay?
ab vortEx X ships an update every 2 months, and QuaDelay every 3 days. Most recently, ab vortEx X was updated on November 3, 2026 and QuaDelay on October 30, 2026.

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