# Copperhead — Digital Synthesizer

> AUv3 digital subtractive synthesizer plugin inspired by 80s vintage synths. (iPhone/iPad app by 4Pockets.com.)

- Source: https://appshunter.io/ios/app/copperhead/id6444207037 (this page in markdown: same URL + `.md`)
- Developer: [4Pockets.com](https://appshunter.io/developer/370131860)
- Category: Music
- Price: $14.99
- Rating: 4.70/5 from 18 App Store ratings · 18 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 69 MB
- Languages: American English
- Released: 2023-03-10
- Data updated: 2026-09-03
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/copperhead/id6444207037/reviews.md

## What is Copperhead?

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.

## Key features

- AUv3 compatible
- Multi-note polyphony
- Integrated arpeggiator
- Customizable waveforms
- Integrated audio effects
- 32-step sequencer
- Preset Manager

## Recent user reviews (10 of 18)

All indexed reviews: https://appshunter.io/ios/app/copperhead/id6444207037/reviews.md

### 2/5 — A very good sounding synth, but preset system is problematic

*2025-08-28*

Every single time this synth app has been updated it wiped out my own custom presets. That is unacceptable behavior for a production synth, so I can no longer use or recommend this.

**Developer response:** Are you placing your custom presets in your own bank and not altering the default presets? The default presets will be replaced each time we install a new version of the app. This bank is reserved for me to add and expand upon the presets that ship with Copperhead. I will certainly check into whether there is an issue with other banks but since I have multiple people working on new preset packs I would have thought they would have come across this by now if it was a general issue. Have you uninstalled the app at all? When uninstalling all your presets will be removed.

NOTE: Just performed a couple of re-installations and all my custom banks (I have 6) and the contents of my user bank are intact, so I can only assume you saved your presets in the 'Default' bank.

### 5/5 — Fans of Subtractor and Sunrizer, Yamaha 80's

*2025-07-05*

Will absolutely adore this synth.
Might be the most feature packed  synth along with woodman's wood synth.

### 5/5 — Love this one

*2025-05-18*

AMAZING synth from 4pockets - 😌

### 3/5 — Nice but….

*2024-05-28*

Unfortunately automation recording is not working in Logic Pro for iPad. Please fix it, this synth is worth 5 stars if it works properly.

### 5/5 — Phat

*2024-05-27*

Fetter Klang. Eine Riesenanzahl an Möglichkeiten, den Sound in alle möglichen Richtungen zu tweaken. Hunderte hervorragende Presets. Eingebaute ausführliche Hilfe mit Links zu Anleitungsvideos auf YouTube. Ich habe anfangs Zeit gebraucht, um mich an die nüchterne Oberflächengestaltung der 4pockets Apps zu gewöhnen. Inzwischen schätze ich die effektive Ausnutzung der knappen Oberfläche, die einheitliche Gestaltung und dass alle Apps auf iPad UND iPhone gut bedienbar sind. Klare Empfehlung.

### 5/5 — Great Synth with Fun Features

*2024-02-11*

You can produce any sound you can imagine with this synth… really! Do watch the videos in the help menu for a complete tutorial. I\while Copperhead is very intuitive, it’s worth watching the vids to get the most out of it. 
There are amazing features. Not least is the preset banks by the amazing sound designer Spidercemides! You can essentially dump all his presets into a favorites folder. But don’t. If you decide to remove a preset from the Favorites folder you’ll end up deleting the preset from just about everywhere. A small bug which I’m sure will be fixed. I needed to reinstall the app to recover the presets. 
Another amazing feature is the waveform editor. It has something I’ve never seen before, a slider for each fundamental of a sound wave! This is a big deal. You can design some extraordinary sounds and learn about how sounds are made with this tool. I’ve never seen it before and i have a ton of synths. One thing missing however is a way to save the sounds you’ve designed. It will be there when you save the preset of course but it would be nice to develop an original sound library. 
The only very minor problem i have is the the menu diving needed to open some critical windows like ‘effects’ and ‘favorites.’ It’s only three taps to get to the window but other designers have brought you these windows a bit less clumsily. 
Another problem is there’s no way to access the developer’s page… if it even exists. I’m surprised because this is a major developer with an awesome offering of apps. If you hit the developer’s website link you’ll basically be forwarded to a management consultant company which I’m pretty sure is the furthest thing from music as a business can be. 
Overall, a great synth and an incredible value!

### 5/5 — Beautiful synth

*2023-11-01*

It has a very balanced smooth and lush sound. You cannot get a annoying sound from it. Even the init patch siunds nice without tweaking. The siynth has very nice fx. I love especially the reverb and the autopan What i would love to see are more midi CCs , e.g. for the envelopes. I hope we get midi learn in the future.

### 4/5 — MPE baby!

*2023-10-10*

Thank you for adding MPE—what a tremendous boon to an already great synth! I might have to go create some more Stellar Anomalies (presets) for this now—and for StringLab when I get it.  Excellent!

### 3/5 — Please test the AU version for Logic Pro on macOS

*2023-09-06*

Seems to crash Logic Pro as soon as file is opened. Thanks.

### 5/5 — Best synth I’ve come across

*2023-06-01*

This is a brilliant synth, thanks guys. I’ve found it great for creating organ sounds. USR is particularly useful. It is my ‘go to’ synth. Complements the other 4pockets apps.  I’m still exploring. Rotary speaker effect would be a great addition for me.

## Frequently asked questions about Copperhead

### What is Copperhead and what does it do?

Copperhead is a paid AUv3 digital subtractive synthesizer plugin for iOS devices. It emulates the sound of vintage 80s synthesizers while offering modern features like multi-note polyphony, an arpeggiator, and integrated audio effects for sound design and music production.

### What devices does Copperhead support?

Copperhead is compatible with iPhone, iPad, and iPod touch devices. It is designed to be hosted within DAWs such as AUM, Cubasis, GarageBand, and Loopy Pro.

### How much does Copperhead cost?

Copperhead is a paid application priced at $14.99. There are no in-app purchases or ads associated with this synthesizer plugin.

### What kind of waveforms can Copperhead generate?

Copperhead supports traditional waveforms like SINE, SQR, SAW, and TRI, along with SuperSaw, Trapezium, and user-definable types. It also features pulse width modulation and a customizable string engine.

### Does Copperhead have built-in effects?

Yes, Copperhead includes a range of integrated audio effects such as Chorus, Overdrive, Delay, Reverb, and Auto Pan. You can also specify the order of these effects for greater control over your sound.

### How many presets come with Copperhead?

Copperhead ships with over 550 built-in presets, covering a wide variety of instrument categories. These presets are organized into banks and groups within the Preset Manager for easy access and management.

### What is the update frequency for Copperhead?

Copperhead was last updated on December 2nd, 2025, indicating active development and support. The current version is 1.23.

### What is the age rating for Copperhead?

Copperhead has an age rating of 4+, making it suitable for a wide range of users. This rating suggests the content is generally appropriate for children.

## Version history (last 5 releases)

### 1.23 — 2025-12-02

v1.23 B103
Fix for UI issue on some devices using iOS26.1.

### 1.22 — 2025-11-20

v1.22 B102
Fixed toolbar content issue misalignment in iOS26.1 (due to bug in iOS 26.1 was fiine in 26.0)

### 1.21 — 2025-10-03

v1.21 B101
Added a new preset pack from DMT Cymatics with anorher 123 presets.
Added a Haas Effect and an EQ in the Output Options window (Long press the Limiter button).
These new features are saved as part of the preset. The Haas option improves stereo imaging in presets that don't use the sequencer.

### 1.20 — 2025-08-27

v1.11 B93
Updated for compatability with future iOS Versions.

### 1.19 — 2024-06-24

v1.19 B98

Fixed an issue where CONTROLLER packets were being processed after TONE PACKETS causing a delay in the sequencer being enabled/disabled.

Added a second controller. Controller #2 from Heliums chord track now activates the GATE in the FX section.

## Apps similar to Copperhead

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [6X806 Drum Synth Loop Maker](https://appshunter.io/ios/app/6x806-drum-synth-loop-maker/id1444312256) | 4.6 (25) | $2.99 | Music |
| [ANALOGyX1](https://appshunter.io/ios/app/analogyx1/id6745753877) | 5.0 (8) | $2.99 | Music |
| [moodunits](https://appshunter.io/ios/app/moodunits/id1521447619) | 4.5 (48) | $2.99 | Music |
| [FAC Drumkit](https://appshunter.io/ios/app/fac-drumkit/id1552568814) | 4.7 (83) | $17.99 | Music |
| [2XB303 Acid Bass Loop Maker](https://appshunter.io/ios/app/2xb303-acid-bass-loop-maker/id1288067698) | 4.7 (57) | $3.99 | Music |
| [7XDXFM 4OP FM Loop Maker](https://appshunter.io/ios/app/7xdxfm-4op-fm-loop-maker/id1589435250) | 4.0 (6) | $2.99 | Music |

## More apps by 4Pockets.com

- [Meteor Multitrack Recorder](https://appshunter.io/ios/app/meteor-multitrack-recorder/id417726727)
- [Tone Generator Ultra](https://appshunter.io/ios/app/tone-generator-ultra/id514273546)
- [PocketRTA Ultra](https://appshunter.io/ios/app/pocketrta-ultra/id514903914)
- [StompBox Band](https://appshunter.io/ios/app/stompbox-band/id845046209)
- [Audio Toolbox](https://appshunter.io/ios/app/audio-toolbox/id1353387223)
- [Audio Compressor AUv3 Plugin](https://appshunter.io/ios/app/audio-compressor-auv3-plugin/id1426387457)

All apps by 4Pockets.com: https://appshunter.io/developer/370131860

## Related topics

[synthesis connect](https://appshunter.io/ios/topics/synthesis-connect)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*