Comparison

Shimmer AUv3 Audio Plugin vs AU3FX

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

Head to head
About

Shimmer AUv3 Audio Plugin

Create ethereal soundscapes with this AUv3 compatible audio effect. It combines delay, pitch shifting, reverb, and modulation to add spacious atmosphere to instruments and vocals. Features include beat-synced options and harmonic enhancement.

Highlights
  • AUv3 compatible plugin
  • Combines delay, pitch shifting, and reverb
  • Beat-synced modulation options
  • Harmonic exciter and sustain section
  • Single-screen interface with presets
  • Parameter automation and tempo sync
Read full description

This is an AUv3 compatible effect which must be used as plugin with your favourite DAW such as Cubasis, Meteor, Auria or GarageBand. It supports a modern graphical interface and presets with stereo meters for monitoring signal levels. This shimmer effect is a combination of effects that creates an etherial wall of sound. The effect combines a digital delay and pitch shifter to create multiple harmonies before entering a rich long reverb with controllable filtering. The resulting effect is a monsterously huge sound adding a spacious atmospheric quality to any lead instrument or vocal. The effect also features many beat synced modulation options with various modes of operation such as your basic pans and vibrato effects but including sweeps and morphing harmonies. Finally to give the effect some real 'shimmer' we've added a harmonic exciter and a sustain section which samples and holds on to the sound to pull out and emphesise the harmonics. The effect presents all the most frequently used controls to the user in a single screen, but each effect has it's own distinct set of controls and a total of 7 pre-configured touch pads allowing easy recording of controller data. This plugin allows complete parameter automation and auto synced modulation to master tempo. This is one of a suite of AUv3 compatible plugins which will also soon be available from 4Pockets.

About

AU3FX

This professional audio effect plugin offers high-quality real-time reverb for iOS devices. It allows for extensive parameter tweaking to create a vast range of sonic spaces, from intimate rooms to infinite expanses. The app includes built-in presets and filters, with full external control and session saving capabilities.

Highlights
  • High quality 32-bit DSP engine
  • Extensive parameter tweaking
  • Built-in resonant filters
  • Bundled presets
  • Multiple instances
  • Save/load session state
  • External parameter control
Features
Read full description

High quality real time reverb AudioUnit effect, for everything between small rooms, resonators, and infinitely large spaces. This app is part of the AU3FX series, a collection of simple and powerful audio unit effect plugins. • High quality 32-bit DSP engine. • A multitude of parameters to tweak to get a wide range of sounds. • Built-in resonant filters. • Comes with several bundled presets. • Use multiple instances at the same time. • Save/load session state in host. • External access and control of all parameters from host. • User presets shared across hosts (on iOS 13 and later).

Screenshots

Shimmer AUv3 Audio Plugin4 screens
AU3FX2 screens

Verdict

The call

The clearest difference is rating: AU3FX at 5.0 against Shimmer AUv3 Audio Plugin's 4.2. AU3FX also leads on review sentiment (100% vs 64%) and price ($4.99 vs $7.99). On ratings volume, 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

Shimmer AUv3 Audio Plugin costs $7.99 and AU3FX $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

AU3FX holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 31 and 14 respectively. Written reviews point the same way: 64% of Shimmer AUv3 Audio Plugin's written reviews are positive against 100% of AU3FX's.

UpkeepUpdate frequency

Shimmer AUv3 Audio Plugin ships an update every 8 months, AU3FX every 6 months. The most recent releases landed on August 26, 2026 and September 21, 2026 respectively.

Scorecard3 real differences · 7 level
Shimmer AUv3 Audio Plugin versus AU3FX: the parameters behind the verdict, then further details
ParameterShimmer AUv3 Audio PluginAU3FX
Price$7.99$4.99 — better
Rating4.2 (31 ratings)5.0 (14 ratings) — better
Positive reviews63.6% of reviews100.0% of reviews — better
Number of ratings31 — better14
Update frequencyEvery 8 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS1312.0 — better
Further details — not scored
Size6 MB2 MB
Age rating4+4+
Developer4Pockets.comKymatica AB

Customer experience

Shimmer AUv3 Audio Plugin

All ratings31 ratings
Positive77.4%
Neutral6.5%
Negative16.1%
Written reviews33 reviews
Positive63.6%
Neutral9.1%
Negative27.3%

AU3FX

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Shimmer AUv3 Audio Plugin

No in-app purchases

None

AU3FX

No in-app purchases

Questions

Is Shimmer AUv3 Audio Plugin free?
Shimmer AUv3 Audio Plugin costs $7.99, with no in-app purchases.
Is AU3FX free?
AU3FX costs $4.99, with no in-app purchases.
Which has better reviews, Shimmer AUv3 Audio Plugin or AU3FX?
AU3FX is rated higher. Shimmer AUv3 Audio Plugin averages 4.2 out of 5 from 31 ratings, while AU3FX averages 5.0 from 14 ratings.
Do Shimmer AUv3 Audio Plugin or AU3FX have ads?
Neither Shimmer AUv3 Audio Plugin nor AU3FX shows ads.
Which is updated more often, Shimmer AUv3 Audio Plugin or AU3FX?
Shimmer AUv3 Audio Plugin ships an update every 8 months, and AU3FX every 6 months. Most recently, Shimmer AUv3 Audio Plugin was updated on August 26, 2026 and AU3FX on September 21, 2026.

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