Comparison

Osculatrix vs DelayJaVu

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

Head to head
About

Osculatrix

This audio effect plugin offers modulated filters, delays, and saturation for creative sound design. It can transform audio from subtle coloration to complete destruction. Use it within your favorite music production apps.

Highlights
  • Modulated filters
  • Delay effects
  • Saturation
  • AUv3 plugin
  • Subtle coloration to destruction
Features
Read full description

Osculatrix is a tremolo with ideas above its station. With modulated filters, delays, a bit of saturation. Like its predecessors, it is cryptic and opinionated, and it goes from subtle colouration to total destruction at the twist of a knob. Osculatrix is an AUv3 effect plugin. It does nothing on its own. Use it in GarageBand, AUM or your favourite audio application. Osculatrix does not want your money and it doesn't want your data. It is 100% free. No ads, no in-app purchases, no subscriptions, no surveillance, no nag screens.

About

DelayJaVu

This audio effect plugin creates a unique stereo reverse delay sound. It captures your dry signal and plays it back in reverse, with independent control over left and right channel delay times, modulation, and stereo spread for creative sound design.

Highlights
  • Stereo reverse delay effect
  • Independent L/R delay times
  • Adjustable modulation
  • Variable stereo spread
  • AUv3 compatible
  • Standalone operation
Read full description

DelayJaVu - Stereo Reverse Delay (AUv3) DelayJaVu is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro or GarageBand. Overview Deja Vu - French for "already seen". The brief, intense and often startling sensation that a current, new experience has happened before. DelayJaVu is a stereo reverse delay with independent delay times for the left and right channels. DelayJaVu works by capturing your dry signal in a delay buffer, which is then read backwards over a time period corresponding to a delay time. As the virtual delay head repeatedly scans back through the delay buffer, you hear segments your original dry signal, repeated in reverse. I think reverse delay is a really cool effect - one of my favourites in fact! I especially like its slightly unpredictable nature, making it a great effect to interact with, as you play. I don't recall seeing any reverse delay plugins with independent times for the left and right channels so that may be something unique that DelayJaVu has to offer. And the addition of modulation and variable stereo spread adds further creative options, while keeping DelayJaVu compact, super easy to use and very DSP-friendly. Controls Mode - Off bypasses the effect and uses a "soft switching" aka "trails mode", to avoid pops and clicks. In L/R Lock mode, the delay time is set to be the same for the left and right channel, and the parameter sliders will be "locked" to the same value when changed. In L/R Free mode, you can set independent delay times for the left and right channel. Time L / R - Sets the delay time for the left and right channels independently, from 250ms to 2.5 seconds. Interesting effects can be achieved by setting the delay times to be close, but not exactly the same. Please note - Unlike a "normal" delay where you will hear the sound repeat after the delay time specified, DelayJaVu doesn't quite work like that. The delay heads for both channels are always in motion and repeat their cycles according to the delay time. This means that sometimes the delay head will be "closer" to the incoming audio. In this case you may hear the first repeat almost straight away, with subsequent repeats occurring at delay time intervals when the Feedback is > 0%. This is especially noticeable (and cool!) when running in Free mode with different delay times. This is also the way many reverse delays are implemented and why this particular design doesn't lend itself to tempo sync delay effects as the repeats will not "quantise" to note length boundaries. Feedback - Sets the feedback / regeneration for the delay on both channels. Mod - Adds a variable amount of modulation to both channels. As each channel is modulated differently, this can produce a nice stereo effect. Spread - At maximum, the left and right delay channels are hard-panned and have their own independent modulation applied. Decreasing the Spread parameter effectively narrows the stereo image of the delay and modulation all the way down to mono. Mix - The mix control goes from 100% dry to 100% wet. At the centre 50% position, the dry and wet signals are evenly balanced. At 100%, you only hear the wet / processed signal. For more info and support please visit: www.waverley-instruments.com/robjackson

Screenshots

Osculatrix2 screens
DelayJaVu3 screens

Verdict

The call

The clearest difference is price: Osculatrix at Free against DelayJaVu's $1.99. Osculatrix also leads on update cadence (monthly vs every 2 months) and ratings volume (7 vs 1). DelayJaVu's advantage is iOS requirement (12.0 vs 15.0). On rating, ads, in-app purchases and device support 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

Osculatrix is free to download; DelayJaVu costs $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 — 5.0 for Osculatrix against 5.0 for DelayJaVu. That said, the two scores are not equally well evidenced: Osculatrix has 7 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Osculatrix ships an update monthly, DelayJaVu every 2 months. The most recent releases landed on June 22, 2026 and September 18, 2026 respectively.

Scorecard5 real differences · 5 level
Osculatrix versus DelayJaVu: the parameters behind the verdict, then further details
ParameterOsculatrixDelayJaVu
PriceFree — better$1.99
Rating5.0 (7 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings7 — better1
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.012.0 — better
Further details — not scored
Size2 MB13 MB
Age rating4+4+
DeveloperMatthew CaldwellRob Jackson

Customer experience

Osculatrix

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DelayJaVu

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Osculatrix

No in-app purchases

None

DelayJaVu

No in-app purchases

Questions

Is Osculatrix free?
Osculatrix is free to download, with no in-app purchases.
Is DelayJaVu free?
DelayJaVu costs $1.99, with no in-app purchases.
Which has better reviews, Osculatrix or DelayJaVu?
Osculatrix and DelayJaVu are both rated 5.0 out of 5 on the App Store, from 7 and 1 ratings respectively.
Do Osculatrix or DelayJaVu have ads?
Neither Osculatrix nor DelayJaVu shows ads.
Which is updated more often, Osculatrix or DelayJaVu?
Osculatrix ships an update monthly, and DelayJaVu every 2 months. Most recently, Osculatrix was updated on June 22, 2026 and DelayJaVu on September 18, 2026.

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