Comparison

EvolverFX AUv3 Audio Plugin vs Circa Looper

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

Head to head
About

EvolverFX AUv3 Audio Plugin

Create multi-layered evolving soundscapes and automatic musical accompaniment. This tool features a sophisticated synthesizer and sequencing engine with four independent lanes, allowing for complex sound design and real-time performance control. It supports MIDI input, audio samples, and harmonic sound generation.

Highlights
  • 4 independent sequencer lanes
  • Up to 64 steps per sequence
  • MIDI keyboard input
  • Audio sample layering
  • Harmonic sound generation
  • Real-time performance controls
  • ARP function
Features
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Evolver is a performance tool for creating multi-layered evolving sequences of sound. At its most basic think of evolver as a 4 lane sequencer which creates automatic accompaniment from notes and chords as you play on your MIDI keyboard, but it can also be used to create elastic evolving soundscapes where audio samples seamlessly merge into one another to create highly complex and original sounds. At the heart of evolver is a sophisticated wave synthesizer and sequencing engine which can create dramatic hard hitting transitions of sounds or merge sounds to create seamless transitions that evolve in time to the beat. It has 4 sequencer lanes which can run independently and mixed together using the real-time controls or over MIDI. When you play a chord on your MIDI keyboard for instance, each of the 4 sequencer lanes will take those MIDI notes and translate them into a musical sequence of sounds which are combined together and synced to create a form of automatic accompaniment. Evolver can load its own multi-layer patches or import them directly from Chameleon. These patches can be layered using the 4 sequencer lanes or split over a virtual keyboard. You can assign key zones, transpose them, assigned MIDI channels and velocity levels, set latch options etc. You can also load in your own one shot samples and lay them end on end to create evolving atmospheres or backing soundscapes. These samples can be looped or be free running with definable start/end and loop points using our non destructive editor. We also included a third sound source which lets you build sounds on the fly by overlaying harmonics to create anything from traditional sine, square, triangle, saw waves to complex detuned oscilators. These can be used in conjunction with multi-samples or one-shot-samples within the same sequencer lane. You can even randomize a complete sequence of harmonic sounds which when pieced together create some very unique and dynamic voices. Each sequencer lane can be up to 64 steps in length, each step has independent timing, pitch, volume, gate, probability, sample source etc. so the scope of what is achievable is vast. Each sequencer lane has its own ADSR, VCF and LFO which operates on all sounds within its lane, as well as being able to change the underlying settings for each sound source. Evolver also includes an ARP function which can be run in one of the default modes or you can define your own fingering patterns to be used to enhance your playing style. Create your own sequences, lay down your MIDI notes in your DAW and have Evolver automatically play along to your chord sequences, automatically locking to the host tempo. Sequencer events can be fixed or transposed allowing you to create percussive and drum backing using a single lane. Key Features: • 4 sequencer lanes • Up to 64 notes per sequence. • Each note can be fixed or transposed. • Timing and note probability. • 3 different sound source types (multi-sample, one-shot samples and harmonic) . • Add your own loops to a sequence. • Built in ARP function. • Import your own samples and mutli-sample patches. • Chameleon Support. • 5 different effect types (reverb, delay, phaser, flanger and chorus). • 8 band EQ. • .Latch Feature to hold chords/notes. • Create independent key zones with transposition and MIDI channels. • Paramter Automation from your DAW. • Control mixing and sequencer enable buttons using MIDI. • Built in Sampler. • Multiple Import options (including an experimental SFZ format). • iTunes and Files App importing of samples into the audio pool. • Files App Drag & Drop Support • Comprehensive Help pages included. Please Note: Not all features are currently compatible with Auria.

About

Circa Looper

A powerful multi-channel looping instrument for iPad, designed for musicians and producers. It offers six independent stereo loop layers, deep modulation, precision syncing, and built-in effects for creating complex patterns and evolving soundscapes. Its touch-friendly interface allows for hands-on creative control and seamless DAW integration.

Highlights
  • Six independent stereo loop layers
  • Deep modulation control
  • Precision syncing
  • Built-in reverb and delay
  • Touch-friendly interface
  • Full MIDI mapping
  • Drag-and-drop audio export
Features
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Circa runs as a standalone app, or as an AUv3 plugin in hosts such as GarageBand, Logic, AUM and Cubase. Equal parts workhorse and abstract creative tool, Circa is a six track multi-layer looping environment that can do most of the things your popular floor pedal looper can while also paying homage to the serendipitous world of ambient looping. Each layer can sync to the host, a master loop, or free run, and can be triggered in sync, with an audio signal, or freely. Circa has seven stereo outputs (including a dedicated cue output for monitoring) and built-in reverb and delay. Add in a complete MIDI control and LFO modulation system and Circa is a full looping workstation. Features -- Multi-Layered Looping Circa has six layers that can operate independently or in sync with each other and/or the host. Circa can record from the stereo input, or self-record via an internal buss for interesting feedback possibilities. -- Standalone Or Plugin As a standalone app, Circa has its own audio and MIDI settings: choose your audio interface, sample rate and buffer size, pick the input pair, send each of Circa's seven outputs to any output pair on your interface, and select a MIDI input. Sync to incoming MIDI clock, or let Circa set the tempo from your first loop. As an AUv3 plugin, it lives inside your host and syncs to its transport. -- Designed To Be Touched And Played Circa's user interface is made for tactile manipulation, with touch strips for speed and position (including dedicated pages). The position strip can be further subdivided with slices. All this works together to turn a looping effect into a playable instrument. -- Easy To Get Along With Circa's layers each have an undo for destructive edits like recording, overdubbing, and erasing. -- Controllability And Modulation Circa has 30 modulation slots. Each one can map a MIDI controller to any of Circa's looping functions, or run an LFO: seven shapes, free-running or tempo-synced, with rate, phase and level, modulating speed, start and end position, level, panning, delay and reverb sends, filter frequency and resonance, or the slice the play head is on. LFOs swing around wherever each control is set, so the knobs stay in charge. -- Self-Contained Circa has a full internal mixer, filtering on each layer, and studio-quality send reverb, send delay, parametric EQ and compressor taken directly from Audio Damage's extensive effect library. -- Expandable And Performance-Ready Circa has 7 outputs in all: six assignable stereo outputs and a cue output for monitoring. Send any layer to any of the six stereo outputs, while keeping the cue for soloing, recording, and editing, unheard by the audience. In the standalone app, each output can go to its own pair of outputs on your audio interface. -- Ecosystem-Aware Circa's user presets are cross-platform compatible, and work on any instance of Circa, whether on macOS, Windows, Linux, or iOS. In addition, sessions created in GarageBand or Logic on iOS will open in the desktop version on macOS if you have purchased a license to that version.

Screenshots

EvolverFX AUv3 Audio Plugin4 screens

Verdict

The call

EvolverFX AUv3 Audio Plugin and Circa Looper both sit at 4.7 stars, but that hides the real split: 72% of EvolverFX AUv3 Audio Plugin's written reviews are positive against 33% of Circa Looper's. EvolverFX AUv3 Audio Plugin also leads on device support (3 vs 1) and ratings volume (35 vs 10). Circa Looper's advantage is price ($7.99 vs $14.99). On rating, update cadence, 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

EvolverFX AUv3 Audio Plugin costs $14.99 and Circa Looper $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for EvolverFX AUv3 Audio Plugin against 4.6 for Circa Looper. Both are backed by a comparable volume of ratings — 35 and 10 respectively. Written reviews are what separate them: 72% of EvolverFX AUv3 Audio Plugin's written reviews are positive against 33% of Circa Looper's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

Scorecard5 real differences · 5 level
EvolverFX AUv3 Audio Plugin versus Circa Looper: the parameters behind the verdict, then further details
ParameterEvolverFX AUv3 Audio PluginCirca Looper
Price$14.99$7.99 — better
Rating4.7 (35 ratings) — better4.6 (10 ratings)
Positive reviews72.2% of reviews — better33.3% of reviews
Number of ratings35 — better10
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS13 — better16.0
Further details — not scored
Size861 MB66 MB
Age rating4+4+
Developer4Pockets.comAudio Damage, Inc.

Customer experience

EvolverFX AUv3 Audio Plugin

All ratings35 ratings
Positive88.6%
Neutral8.6%
Negative2.9%
Written reviews36 reviews
Positive72.2%
Neutral13.9%
Negative13.9%

Circa Looper

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews6 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

EvolverFX AUv3 Audio Plugin

No in-app purchases

None

Circa Looper

No in-app purchases

Questions

Is EvolverFX AUv3 Audio Plugin free?
EvolverFX AUv3 Audio Plugin costs $14.99, with no in-app purchases.
Is Circa Looper free?
Circa Looper costs $7.99, with no in-app purchases.
Which has better reviews, EvolverFX AUv3 Audio Plugin or Circa Looper?
EvolverFX AUv3 Audio Plugin is rated higher. EvolverFX AUv3 Audio Plugin averages 4.7 out of 5 from 35 ratings, while Circa Looper averages 4.6 from 10 ratings.
Do EvolverFX AUv3 Audio Plugin or Circa Looper have ads?
Neither EvolverFX AUv3 Audio Plugin nor Circa Looper shows ads.
Which is updated more often, EvolverFX AUv3 Audio Plugin or Circa Looper?
EvolverFX AUv3 Audio Plugin ships an update every 3 weeks, and Circa Looper every 3 weeks. Most recently, EvolverFX AUv3 Audio Plugin was updated on October 1, 2026 and Circa Looper on September 29, 2026.

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