Comparison

FAC Chorus vs Schlap AUv3

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

Head to head
About

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.

Highlights
  • 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
Features
Read 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

About

Schlap AUv3

This audio plugin offers an aggressive, characterful compressor inspired by vintage hardware. It enhances tracks with energy and impact by utilizing RMS detection for dynamic and punchy sound. It functions as a standalone app or an AUv3 plugin within music production hosts.

Highlights
  • Aggressive program-dependent compressor
  • RMS detection for dynamic sound
  • Standalone app and AUv3 plugin
  • Inspired by vintage hardware
  • Enhances track energy and impact
Currently charting
Read full description

Schlap is a characterful, colourful and aggressive sounding program-dependent AUv3, IAA & standalone compressor. It takes inspiration from hardware RMS compressors of the past and evolves them into a modern setting. If you want your tracks to be energetic, in-your-face and bold, make ‘em ‘Schlap’. The compressor uses a program-dependent attack and release influenced by old hardware which makes the compression sound characterful and dynamic. The RMS detection means that Schlap detects the average loudness of a signal, resulting in sudden short peaks being uncompressed so that they can attack hard and sound heavy hitting. Also inherently in RMS detection, there is a slight delay in compression which allows the initial, early transients to sneak through uncompressed so they keep their punch. You’ve got a safe, controlled track you think you’re happy with, but you have to ask yourself… ‘Does it Schlap?’ Schlap is both a stand-alone application as well as an AUv3 plugin, meaning it works within iOS and iPadOS hosts such as GarageBand.

Screenshots

FAC Chorus2 screens
Schlap AUv32 screens

Verdict

The call

The clearest difference is in-app purchases: Schlap AUv3 at none against FAC Chorus's 3. Schlap AUv3 also leads on price ($4.99 vs $9.99) and chart position (#176 vs unranked). FAC Chorus's advantage is update cadence (every 5 months vs every 11 months) and ratings volume (61 vs 17). On rating, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

FAC Chorus costs $9.99 and Schlap AUv3 $4.99 up front. FAC Chorus sells 3 one-off in-app purchases. Schlap AUv3 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for FAC Chorus against 4.9 for Schlap AUv3. Both are backed by a comparable volume of ratings — 61 and 17 respectively. Written reviews are what separate them: 95% of FAC Chorus's written reviews are positive against 100% of Schlap AUv3's.

UpkeepUpdate frequency

FAC Chorus ships an update every 5 months, Schlap AUv3 every 11 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 4 level
FAC Chorus versus Schlap AUv3: the parameters behind the verdict, then further details
ParameterFAC ChorusSchlap AUv3
Price$9.99$4.99 — better
Rating4.8 (61 ratings)4.9 (17 ratings) — better
Positive reviews95.0% of reviews100.0% of reviews — better
Number of ratings61 — better17
Update frequencyEvery 5 months — betterEvery 11 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#176 — better
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.411.0 — better
Further details — not scored
Size4 MB5 MB
Age rating4+4+
DeveloperFrederic CorvestCaelum Audio Ltd

Customer experience

FAC Chorus

All ratings61 ratings
Positive96.7%
Neutral0.0%
Negative3.3%
Written reviews40 reviews
Positive95.0%
Neutral2.5%
Negative2.5%

Schlap AUv3

All ratings17 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

FAC Chorus

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$14.99
None

Schlap AUv3

No in-app purchases

Questions

Is FAC Chorus free?
FAC Chorus costs $9.99, and also offers in-app purchases.
Is Schlap AUv3 free?
Schlap AUv3 costs $4.99, with no in-app purchases.
Which has better reviews, FAC Chorus or Schlap AUv3?
Schlap AUv3 is rated higher. FAC Chorus averages 4.8 out of 5 from 61 ratings, while Schlap AUv3 averages 4.9 from 17 ratings.
Do FAC Chorus or Schlap AUv3 have ads?
Neither FAC Chorus nor Schlap AUv3 shows ads.
Which is updated more often, FAC Chorus or Schlap AUv3?
FAC Chorus ships an update every 5 months, and Schlap AUv3 every 11 months. Most recently, FAC Chorus was updated on October 22, 2026 and Schlap AUv3 on October 24, 2026.

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