Comparison

FAC Medusa 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 Medusa

This versatile audio processor offers a characterful compressor with multiple dynamic controls. It allows for detailed sound shaping through 3-band tone controls, split frequency compression, and both downward and upward compression types. Enhance your audio with parallel compression, a brickwall limiter, and precise metering.

Highlights
  • Characterful compressor with multiple dynamic processors
  • 3-Band input tone controls with adjustable crossovers
  • Split/Sum frequency bands before compression
  • Downward and Upward compression types
  • Parallel compression and master Brickwall limiter
  • Sidechain and multi-outs support
  • Precise metering with decibel values
Read full description

• Gentle, natural, or aggressive and colorful compressor • Combine different dynamic processors into a single and easy to use unit • 3-Band input tone controls with adjustable crossovers and saturators • Split/Sum frequency bands before compression • Two dynamic controls: Downward or Upward • Range and knee controls to limit compression depth • Parallel compression and master Brickwall limiter • Sidechain and multi-outs support • Precise metering with decibel values • Advanced Responsive Design, portrait and landscape views • AuV3 for iOS (iPad/iPhone) Compressors are probably the most used audio processors and you surely know what it's all about and how it can help to control the dynamic range of your audio signal. So let's get straight to what makes FAC Medusa a new versatile and characterful compressor! FAC Medusa combines different dynamic processors into a single and easy to use unit, the input signal flows along the following stages: 1) "Pre-amp with tone control and saturation circuit" The input signal is split into three bands of frequencies (Low, Mid and High) according two adjustable crossover points. Setting the level and the saturation amount of each frequency band will definitely make the effect more natural or characterful. 2) "Compression" In addition to the usual controls you may expect, FAC Medusa also provides two types of compression. Downward compression, which is obviously the most common, decreases the level of audio signal above the threshold. And also Upward compression which is less known, despite powerful, and increases the level of audio signal below the threshold. The compression can operate either on the SUM of the frequency bands (L+M+H) or on each frequency band coming from stage 1. 3) "Parallel compression and Brickwall limiter" The master Brickwall limiter is optional and will ensure that the output of stage 2, possibly blended with the original audio signal, remain under control. The limiter comes with threshold and release time controls. As you have realized FAC Medusa has many faces: gentle, natural, or aggressive and colorful. Choose the one you want and be prepared for an exciting sound design experience. Whether you are a budding music producer or passionate amateur musician in any genre, you will definitely find a happy use for it! - AuV3 and Standalone App - To use the sidechain and/or to output the additional three bands, you need a host able to provide to the AuV3 an input bus and three additional output busses The documentation is available at fredantoncorvest.com/FAC_Medusa.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 Medusa4 screens
Copperhead4 screens

Verdict

The call

The clearest difference is in-app purchases: Copperhead at none against FAC Medusa's 3. Copperhead also leads on update cadence (monthly vs every 4 months). FAC Medusa's advantage is price ($9.99 vs $14.99) and rating (5.0 vs 4.7). On ratings volume, ads, monetization model 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 Medusa costs $9.99 and Copperhead $14.99 up front. FAC Medusa sells 3 one-off in-app purchases. Copperhead asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FAC Medusa holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 23 and 18 respectively. Written reviews point the same way: 100% of FAC Medusa's written reviews are positive against 83% of Copperhead's.

UpkeepUpdate frequency

FAC Medusa ships an update every 4 months, Copperhead monthly. Both last shipped on November 3, 2026.

Scorecard5 real differences · 5 level
FAC Medusa versus Copperhead: the parameters behind the verdict, then further details
ParameterFAC MedusaCopperhead
Price$9.99 — better$14.99
Rating5.0 (23 ratings) — better4.7 (18 ratings)
Positive reviews100.0% of reviews — better83.3% of reviews
Number of ratings23 — better18
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size3 MB70 MB
Age rating4+4+
DeveloperFrederic Corvest4Pockets.com

Customer experience

FAC Medusa

All ratings23 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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 Medusa

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

Copperhead

No in-app purchases

Questions

Is FAC Medusa free?
FAC Medusa costs $9.99, and also offers in-app purchases.
Is Copperhead free?
Copperhead costs $14.99, with no in-app purchases.
Which has better reviews, FAC Medusa or Copperhead?
FAC Medusa is rated higher. FAC Medusa averages 5.0 out of 5 from 23 ratings, while Copperhead averages 4.7 from 18 ratings.
Do FAC Medusa or Copperhead have ads?
Neither FAC Medusa nor Copperhead shows ads.
Which is updated more often, FAC Medusa or Copperhead?
FAC Medusa ships an update every 4 months, and Copperhead monthly. Most recently, FAC Medusa was updated on November 3, 2026 and Copperhead on November 3, 2026.

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