Comparison

FAC Chorus vs Copperhead

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

Copperhead

This digital synthesizer plugin offers a vintage 80's sound with modern features like multi-note polyphony, an arpeggiator, and integrated audio effects. Design custom waveforms, explore various modulation options, and utilize a powerful sequencer to craft unique sounds.

Highlights
  • AUv3 compatible
  • Multi-note polyphony
  • Integrated arpeggiator
  • Customizable waveforms
  • Integrated audio effects
  • 32-step sequencer
  • Preset Manager
Features
Read full description

Copperhead is an AUv3 digital subtractive synthesizer plugin which draws its influence from the vintage synthesizers of the early 80's. Only now we have multi-note polyphony, a build in arpeggiator, and a host of integrated audio effects. Copperhead features a custom String Machine, the ability to design your own custom waveforms, as well as supporting oscillator sync and various cross modulation effects. Cross modulation is a type of FM synthesis which can be used to morph simplistic waveforms into something far more aggressive and interesting. At the heart of Copperhead are its two oscillators, which support all your traditional waveforms (SINE,SQR,SAW,TRI), as well as SuperSaw, Trapezium, and other user definable types. The app features pulse width modulation and supersaw, as well as a customisable string engine and the ability to create your own oscillator types. The Voltage Controller Filter supports the usual LP, HP, BP and Notch filters in series or parallel configuration, as well as a couple of unusual ones like Formant which allows you to sweep your cutoff to create interesting vowel sounds. Copperhead also features twin LFO's with random and one shot functionality. It also supports Cross, Ring and FM modulators, in addition to low and high shelf filters. One of the great features is the integrated audio gate, which allows you to generate stuttering audio right out of the box. Combined with effects such as Chorus, Overdrive, Delay, Reverb and Auto Pan / Tremelo, and the ability to specify effect order, you have a lot of control over your sound. If that wasn't enough, we also include a 32 step sequencer, with various mono and poly modes with direct control control of various synth elements. We have a built in Preset Manager which groups presets into banks and groups, which supports drag and drop for easy import/export of presets. You can also access your favourites from a special popup menu, or via the built in quick search facility. Copperhead now ships with over 550 presets which cover just about every instrument category you would ever need. ○ AUv3 compatible. ○ Up to 16 note polyphony. ○ 7 Oscillator wave types. ○ Sub Oscillator. ○ PW/PWM on SQR and TRP waveforms. ○ Supports SuperSaw with MIX and DETUNE. ○ XMod / Ring and FM modulations. ○ Osc Sync. ○ 6 types of VCF filter. ○ Low and High shelf on output. ○ Built in compressor. ○ Chorus, Delay, Overdrive, Reverb and Auto Pan effects. ○ Built in Audio Gate. ○ Preset Manager with Bank/Group/Preset section. ○ Supports drag and drop to import/export presets, groups and banks. ○ Supports web transfer of presets. ○ 32 step arpeggiator. ○ More than 550 built-in presets. NOTE: This is an AUv3 plugin which was designed to be hosted in DAW's such as AUM, Cubasis, GarageBand, Loopy Pro etc.

Screenshots

FAC Chorus2 screens
Copperhead4 screens

Verdict

The call

The clearest difference is price: FAC Chorus at $6.99 against Copperhead's $14.99. FAC Chorus also leads on review sentiment (95% vs 83%) and ratings volume (61 vs 18). Copperhead's advantage is in-app purchases (none vs 3) and update cadence (every 3 weeks vs every 5 months). On rating, 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 $6.99 and Copperhead $14.99 up front. FAC Chorus sells 3 one-off in-app purchases. Copperhead 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 4.7 for Copperhead. Both are backed by a comparable volume of ratings — 61 and 18 respectively. Written reviews are what separate them: 95% of FAC Chorus's written reviews are positive against 83% of Copperhead's.

UpkeepUpdate frequency

FAC Chorus ships an update every 5 months, Copperhead every 3 weeks. The most recent releases landed on September 22, 2026 and September 3, 2026 respectively.

Scorecard7 real differences · 3 level
FAC Chorus versus Copperhead: the parameters behind the verdict, then further details
ParameterFAC ChorusCopperhead
Price$6.99 — better$14.99
Rating4.8 (61 ratings) — better4.7 (18 ratings)
Positive reviews95.0% of reviews — better83.3% of reviews
Number of ratings61 — better18
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.413.0 — better
Further details — not scored
Size4 MB69 MB
Age rating4+4+
DeveloperFrederic Corvest4Pockets.com

Customer experience

FAC Chorus

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

Copperhead

All ratings18 ratings
Positive94.4%
Neutral0.0%
Negative5.6%
Written reviews18 reviews
Positive83.3%
Neutral11.1%
Negative5.6%

In-app purchases

3 purchases

FAC Chorus

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

Copperhead

No in-app purchases

Questions

Is FAC Chorus free?
FAC Chorus costs $6.99, and also offers in-app purchases.
Is Copperhead free?
Copperhead costs $14.99, with no in-app purchases.
Which has better reviews, FAC Chorus or Copperhead?
FAC Chorus is rated higher. FAC Chorus averages 4.8 out of 5 from 61 ratings, while Copperhead averages 4.7 from 18 ratings.
Do FAC Chorus or Copperhead have ads?
Neither FAC Chorus nor Copperhead shows ads.
Which is updated more often, FAC Chorus or Copperhead?
FAC Chorus ships an update every 5 months, and Copperhead every 3 weeks. Most recently, FAC Chorus was updated on September 22, 2026 and Copperhead on September 3, 2026.

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