FAC Chorus vs Schlap AUv3
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
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.
- Aggressive program-dependent compressor
- RMS detection for dynamic sound
- Standalone app and AUv3 plugin
- Inspired by vintage hardware
- Enhances track energy and impact
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | FAC Chorus | Schlap AUv3 |
|---|---|---|
| Price | $9.99 | $4.99 — better |
| Rating | 4.8 (61 ratings) | 4.9 (17 ratings) — better |
| Positive reviews | 95.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 61 — better | 17 |
| Update frequency | Every 5 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | — | #176 — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.4 | 11.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederic Corvest | Caelum Audio Ltd |
Customer experience
FAC Chorus
Schlap AUv3
In-app purchases
FAC Chorus
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$14.99
Schlap AUv3
No in-app purchases
Questions
Is FAC Chorus free?
Is Schlap AUv3 free?
Which has better reviews, FAC Chorus or Schlap AUv3?
Do FAC Chorus or Schlap AUv3 have ads?
Which is updated more often, FAC Chorus or Schlap AUv3?
Other comparisons















