Comparison

sequencism vs Copperhead

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

Head to head
About

sequencism

A music sketchbook tool for creating short, simple musical pieces. It offers traditional track and piano roll editors enhanced with touch-screen capabilities, plus helpful tools like chord helpers. Designed for sketching ideas, not complex productions or live performance.

Highlights
  • Track and piano roll editors
  • MIDI instrument and AUv3 support
  • Chord helper tracks
  • MIDI keyboard with scale support
  • Export to MIDI
  • Audiobus 3 and Ableton Link support
Features
Read full description

Description sequencism is a music sketchbook tool that allows the creation of short and simple pieces of music. It is designed to provide a traditional user interface of track and piano roll editors, while taking advantage of the touch-screen capabilities of the iPad. It also includes other helper tools, such as chord helper tracks. Note that the main goal of this app is to work as a sketchbook, thus it is not recommended to use sequencism to produce complex songs or to play songs live on stage. Features • Simple track mixer and visual mixer (volume, pan) • Multitrack editor: MIDI instrument tracks, chord helper tracks • Support for SF2* and AUv3 instruments (*lightweight SF2 files only) • AUv3 Effects support • AU MIDI support for instruments and effects • Piano roll editor: add, move, copy notes within blocks • MIDI keyboard, supports multiple scales, including user-defined scales • Support for diatonic and chromatic chords, borrowed chords (modal interchange) • Automatic transposing when changing chords or scales • Supports Audiobus 3 and Ableton Link • Support for MIDI keyboards, including Bluetooth keyboards • Export to MIDI Planned features • Undo, Redo • Automation • Import MIDI files (improve existing support) --------- AUv3 instruments requires iPad Mini 2, iPad 4 or newer. AU MIDI requires iOS 11 or newer.

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

Copperhead4 screens

Verdict

The call

The clearest difference is price: sequencism at Free against Copperhead's $14.99. sequencism also leads on iOS requirement (9.3 vs 13.0). Copperhead's advantage is rating (4.7 vs 3.9) and review sentiment (83% vs 67%). On ratings volume, ads and in-app purchases 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

sequencism is free to download; Copperhead costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Copperhead holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 18 and 18 respectively. Written reviews point the same way: 67% of sequencism's written reviews are positive against 83% of Copperhead's.

UpkeepUpdate frequency

sequencism ships an update every 2 months, Copperhead every 3 weeks. The most recent releases landed on June 5, 2026 and September 3, 2026 respectively.

Scorecard7 real differences · 3 level
sequencism versus Copperhead: the parameters behind the verdict, then further details
ParametersequencismCopperhead
PriceFree — better$14.99
Rating3.9 (18 ratings)4.7 (18 ratings) — better
Positive reviews66.7% of reviews83.3% of reviews — better
Number of ratings1818
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS9.3 — better13.0
Further details — not scored
Size26 MB69 MB
Age rating4+4+
DeveloperRodrigo Roman4Pockets.com

Customer experience

sequencism

All ratings18 ratings
Positive77.8%
Neutral0.0%
Negative22.2%
Written reviews18 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

Copperhead

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

In-app purchases

None

sequencism

No in-app purchases

None

Copperhead

No in-app purchases

Questions

Is sequencism free?
sequencism is free to download, with no in-app purchases.
Is Copperhead free?
Copperhead costs $14.99, with no in-app purchases.
Which has better reviews, sequencism or Copperhead?
Copperhead is rated higher. sequencism averages 3.9 out of 5 from 18 ratings, while Copperhead averages 4.7 from 18 ratings.
Do sequencism or Copperhead have ads?
Neither sequencism nor Copperhead shows ads.
Which is updated more often, sequencism or Copperhead?
sequencism ships an update every 2 months, and Copperhead every 3 weeks. Most recently, sequencism was updated on June 5, 2026 and Copperhead on September 3, 2026.

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