FAC Chorus vs DelayJaVu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FAC Chorus
This app delivers an authentic, lush, and organic chorus effect with analog-style circuitry. It offers versatile modulation, from subtle doubling to rich swirling sounds, and can function as a chorus, flanger, or vibrato. Expanded controls and feedback options provide deep sonic shaping for professional music production.
- Authentic analog-style bucket brigade circuitry
- Subtle doubling to rich swirling modulation
- Chorus, Flanger, or Vibrato modes
- Expanded controls with multiple characters
- Feedback control for flanger-like textures
- AUv3 plugin for iOS, macOS, and Vision Pro
Read full descriptionHide full description
• Authentic, lush, and organic chorus effect • True analog-style bucket brigade circuitry • A modern reissue of the most iconic hardware units • Ranges from subtle doubling to rich, swirling modulation • Versatile usage: Chorus, Flanger, or Vibrato • Expanded controls with multiple characters and waveforms • Feedback control for rich, flanger-like textures • A favorite chorus in the iOS music community • Advanced Responsive Design, portrait and landscape views • Universal Purchase: AUv3 for iOS (iPad/iPhone), macOS and Vision Pro FAC Chorus brings depth and movement to your sounds with an authentic, lush, and organic character. Built with true analog-style bucket brigade circuitry, this plugin is a modern reissue of some of the most iconic hardware units, faithfully capturing their distinctive tone. The effect ranges from subtle doubling to rich, swirling modulation, covering different uses as a Chorus, Flanger, or Vibrato. The expanded modulation controls, multiple characters, and LFO waveforms allow precise shaping of your sound, giving you complete creative flexibility. In addition, the feedback control adds rich, flanger-like textures for dynamic sonic effects. Under the hood, the plugin uses two individual delay line paths. Each path’s behavior is determined by the character parameter: Thick and BBD provide warm, classic BBD-style tones, while Clean delivers a more transparent tone with greater modulation. This chorus has become a favorite in the iOS music community, combining vintage inspiration with modern control to deliver professional-quality sound in any production. This is an AUv3 Effect and requires a compatible host to work The in-app purchases are for tipping only, the app is fully functional without them The documentation is available at fredantoncorvest.com/FAC_Chorus.html
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.
- Stereo reverse delay effect
- Independent L/R delay times
- Adjustable modulation
- Variable stereo spread
- AUv3 compatible
- Standalone operation
Read full descriptionHide 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
Verdict
The clearest difference is price: DelayJaVu at $1.99 against FAC Chorus's $9.99. DelayJaVu also leads on in-app purchases (none vs 3) and rating (5.0 vs 4.8). FAC Chorus's advantage is ratings volume (61 vs 1). On ads 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
FAC Chorus costs $9.99 and DelayJaVu $1.99 up front. FAC Chorus sells 3 one-off in-app purchases. DelayJaVu asks for nothing beyond the download.
DelayJaVu holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: FAC Chorus has 61 ratings behind it against 1, so its average is the more settled of the two.
FAC Chorus ships an update every 5 months, DelayJaVu every 2 months. The most recent releases landed on September 28, 2026 and September 18, 2026 respectively.
| Parameter | FAC Chorus | DelayJaVu |
|---|---|---|
| Price | $9.99 | $1.99 — better |
| Rating | 4.8 (61 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 95.0% of reviews | — |
| Number of ratings | 61 — better | 1 |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederic Corvest | Rob Jackson |
Customer experience
FAC Chorus
DelayJaVu
In-app purchases
FAC Chorus
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$14.99
DelayJaVu
No in-app purchases









