Comparison

Circa Looper vs FontStack

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

Head to head
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
Read full description

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.

About

FontStack

This app allows musicians to load and utilize classic SoundFont (.sf2) files within their digital audio workstation. It offers layering, key splitting, and instrument caching for creative sound design and quick access to a vast library of sounds.

Highlights
  • 4 SoundFont layers
  • Keyboard splits
  • SoundFont stacking
  • Instrument caching
  • Remote folder linking
  • Reverb, Delay, Chorus effects
  • Amp Envelope and Filter control
Features
Read full description

FontStack is a 'fontastic' new AUv3 plugin for iOS which can be loaded into your favourite DAW allowing you to utilise all those wonderful and nostalgic SF2 SoundFonts you've collected over the years. The SoundFont standard was created back in the early 90s, and made famous by the SoundBlaster series of sound cards. With the introduction of the Amiga, it spawned a host of musical creation tools called Trackers, which allowed the Amiga to load these SoundFonts and create sophisticated musical scores of 4 or 8 tracks. These days we don't use this standard so much, but there is a wealth of free SF2 files available on the internet just waiting to be loaded into FontStack. A SoundFont comprises a file with an .sf2 file extension. This file contains a set of samples, instruments, and presets. FontStack enables you to load one or more SoundFonts into its 4 layers, and use them in lots of creative ways. You can stack layers to create a rich combination of multiple tones, or assign each layer its own key range on the keyboard to create virtual splits, or a mixture of the two. Each layer can also be assigned its own MIDI channel for true OMNI mode. One great feature of FontStack is its ability to cache all your SoundFonts and the instruments they contain. This allows quick searching for specific instrument types without the need to physically search through SoundFonts to find them. Another great feature is the ability to optionally link to a remote folder containing a global set of SoundFonts, so that they can be shared between apps. Both internal and external SoundFonts and their instruments will be cached and searching is just as easy as it is using internal SoundFonts. FontStack features: ○ 4 SoundFont Layers which can be stacked, layered or played on different channels. ○ 6 Scenes per Layer containing different SoundFont instruments and settings. ○ Keyboard Splits can be created spreading multiple SoundFonts over a single keyboard. ○ SoundFont Stacks can be created, stacking multiple SoundFonts to produce a bigger, thicker sound. ○ Disk Streaming allows you to stream a SoundFont directly from disk saving physical memory. ○ File Manager allowing local and remote file management. ○ Symbolic Link allows you to specify a remote/external folder from which to access your SoundFonts. ○ Instrument Search allows you to search the content of local and remote SoundFonts folders. ○ Drag and Drop your sound fonts directly into the SoundFont Manager. ○ Reverb, Delay & Chorus effects can be applied to each instrument layer. ○ Haas and Stereo Width can be used to simulate virtual STEREO on SoundFonts with MONO samples. ○ Allows direct control of the SoundFonts Amp Envelope and Filter settings.

Screenshots

FontStack4 screens

Verdict

The call

Circa Looper and FontStack both sit at 4.6 stars, but that hides the real split: 75% of FontStack's written reviews are positive against 33% of Circa Looper's. FontStack also leads on device support (3 vs 1) and iOS requirement (13 vs 16.0). Circa Looper's advantage is price ($7.99 vs $14.99). On rating, ratings volume, update cadence and ads 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

Circa Looper costs $7.99 and FontStack $14.99 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 — 4.6 for Circa Looper against 4.5 for FontStack. Both are backed by a comparable volume of ratings — 10 and 12 respectively. Written reviews are what separate them: 33% of Circa Looper's written reviews are positive against 75% of FontStack's.

UpkeepUpdate frequency

Circa Looper ships an update every 3 weeks, FontStack every 2 weeks. The most recent releases landed on September 29, 2026 and September 19, 2026 respectively.

Scorecard4 real differences · 6 level
Circa Looper versus FontStack: the parameters behind the verdict, then further details
ParameterCirca LooperFontStack
Price$7.99 — better$14.99
Rating4.6 (10 ratings) — better4.5 (12 ratings)
Positive reviews33.3% of reviews75.0% of reviews — better
Number of ratings1012 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.013 — better
Further details — not scored
Size66 MB308 MB
Age rating4+4+
DeveloperAudio Damage, Inc.4Pockets.com

Customer experience

Circa Looper

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

FontStack

All ratings12 ratings
Positive83.3%
Neutral8.3%
Negative8.3%
Written reviews8 reviews
Positive75.0%
Neutral12.5%
Negative12.5%

In-app purchases

None

Circa Looper

No in-app purchases

None

FontStack

No in-app purchases

Questions

Is Circa Looper free?
Circa Looper costs $7.99, with no in-app purchases.
Is FontStack free?
FontStack costs $14.99, with no in-app purchases.
Which has better reviews, Circa Looper or FontStack?
Circa Looper is rated higher. Circa Looper averages 4.6 out of 5 from 10 ratings, while FontStack averages 4.5 from 12 ratings.
Do Circa Looper or FontStack have ads?
Neither Circa Looper nor FontStack shows ads.
Which is updated more often, Circa Looper or FontStack?
Circa Looper ships an update every 3 weeks, and FontStack every 2 weeks. Most recently, Circa Looper was updated on September 29, 2026 and FontStack on September 19, 2026.

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