Comparison

ab vortEx X vs PanDualay

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

PanDualay

This audio effect plugin offers a stereo delay with a variable left/right delay time ratio. It features independent auto-panning on delayed repeats for enhanced stereo movement and an analog-flavored sound.

Highlights
  • Stereo delay with variable left/right time ratio
  • Independent auto-pan on delayed repeats
  • Analog-flavored sound
  • Low-pass filter on delay repeats
  • Stereo modulation
  • Adjustable regeneration (feedback)
Read full description

PanDualay Stereo Panning Delay (AUv3) PanDualay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic or GarageBand. Overview PanDualay is an analog-flavoured stereo delay wih a variable left / right delay time ratio. In addition to stereo modulation and a LPF, PanDualay has an independent auto-pan that's applied to the delayed repeats only, giving an additional sense of stereo movement. PanDualy works especially well on lead / mono synth type sounds and can get pretty spacey! 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 50ms and 2 seconds. 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. Ratio - Sets a delay time multiplier for the left / right channels between 1 and 2. For example, a base Delay time of 500ms and a ratio of 1.5 : 1, will result in the left channel being delayed by 750ms and the right channel by 500ms. Interesting effects can be achieved by using non-standard ratios. For example, 1.62 is approximately the Golden Ratio, and at high Regen values can produce an almost reverb-like sonic wash! Pan - Sets the frequency of the auto-pan LFO. Note for the effect to be more obvious, the Ratio should be set to something other than 1 : 1. 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. Mix - Sets the level of the delayed signal. Please note the dry / input signal is always present. If the name sounds familiar, PanDualay is an improved version of the PANDUALAY 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
PanDualay2 screens

Verdict

The call

The clearest difference is price: PanDualay at $1.99 against ab vortEx X's $12.99. PanDualay also leads on update cadence (every 2 days vs every 2 months) and rating (5.0 vs 4.6). On ratings volume, ads, in-app purchases and monetization model 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 PanDualay $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PanDualay holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 8 and 5 respectively. Written reviews point the same way: 88% of ab vortEx X's written reviews are positive against 100% of PanDualay's.

UpkeepUpdate frequency

ab vortEx X ships an update every 2 months, PanDualay every 2 days. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
ab vortEx X versus PanDualay: the parameters behind the verdict, then further details
Parameterab vortEx XPanDualay
Price$12.99$1.99 — better
Rating4.6 (8 ratings)5.0 (5 ratings) — better
Positive reviews87.5% of reviews100.0% of reviews — better
Number of ratings8 — better5
Update frequencyEvery 2 monthsEvery 2 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%

PanDualay

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ab vortEx X

No in-app purchases

None

PanDualay

No in-app purchases

Questions

Is ab vortEx X free?
ab vortEx X costs $12.99, with no in-app purchases.
Is PanDualay free?
PanDualay costs $1.99, with no in-app purchases.
Which has better reviews, ab vortEx X or PanDualay?
PanDualay is rated higher. ab vortEx X averages 4.6 out of 5 from 8 ratings, while PanDualay averages 5.0 from 5 ratings.
Do ab vortEx X or PanDualay have ads?
Neither ab vortEx X nor PanDualay shows ads.
Which is updated more often, ab vortEx X or PanDualay?
ab vortEx X ships an update every 2 months, and PanDualay every 2 days. Most recently, ab vortEx X was updated on October 10, 2026 and PanDualay on October 16, 2026.

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