Comparison

Eos 2 vs AU3FX

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

Head to head
About

Eos 2

This studio-quality algorithmic reverb offers five unique algorithms for diverse audio production needs. Easily sculpt your sound with extensive controls and an intuitive interface, perfect for everything from subtle room effects to expansive ambient textures.

Highlights
  • Five custom reverb algorithms
  • Full control over reverb parameters
  • Rate and depth modulation
  • Three-band EQ
  • Infinite mode
  • AUv3 App Extension and standalone
Features
Currently charting
Read full description

**Description:** Eos 2 is Audio Damage's studio-quality algorithmic reverb, now with five custom reverb algorithms designed in collaboration with Sean Costello of Valhalla DSP. Available as an AUv3 App Extension for hosts like AUM, AudioBus, GarageBand, Cubasis, and Auria Pro, and as a standalone application. Five algorithms give you a broad palette of reverb for any production context. Three plate algorithms cover everything from tight, dark vintage plates to wide stereo ambience. The new Random Plate algorithm produces organic, evolving reflections that never quite repeat, and is beautiful on pads, keys, and vocals. SuperHall delivers the incredibly long, densely modulated hall sounds that Eos has always been known for: Eno-style ambience that simply isn't possible with convolution reverbs. The streamlined interface makes it easy to dial in exactly the sound you need, from a short, dense room on your drum bus to an infinite wash of sound on a synthesizer pad. **Features** - Five reverb algorithms: Mono Plate, Stereo Plate 1, Stereo Plate 2, Random Plate, and SuperHall - Full control over pre-delay, room size, decay time, attack, and diffusion - Rate and depth modulation for lively, animated reverb tails - Three-band EQ with adjustable crossover points to sculpt the tonal character of the reverb - Infinite mode for drones and sustained textures - Mix lock preserves your wet/dry balance when browsing presets - Resizable interface with real-time waveform display - Factory presets included, with full cross-platform user preset management - AUv3 App Extension and standalone application - Note: Eos 2 is a dense, heavily modulated algorithmic reverb. For best results on older devices, use a single instance as a send effect.

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

Eos 22 screens
AU3FX2 screens

Verdict

The call

The clearest difference is rating: AU3FX at 5.0 against Eos 2's 4.4. AU3FX also leads on review sentiment (100% vs 63%) and update cadence (every 6 months vs every 15 months). Eos 2's advantage is chart position (#180 vs unranked). On ratings volume, ads, in-app purchases and monetization model 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

Eos 2 costs $6.99 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 4.4. Both are backed by a comparable volume of ratings — 18 and 14 respectively. Written reviews point the same way: 63% of Eos 2's written reviews are positive against 100% of AU3FX's.

UpkeepUpdate frequency

Eos 2 ships an update every 15 months, AU3FX every 6 months. The most recent releases landed on September 26, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 6 level
Eos 2 versus AU3FX: the parameters behind the verdict, then further details
ParameterEos 2AU3FX
Price$6.99$4.99 — better
Rating4.4 (18 ratings)5.0 (14 ratings) — better
Positive reviews62.7% of reviews100.0% of reviews — better
Number of ratings18 — better14
Update frequencyEvery 15 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#180 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size27 MB2 MB
Age rating4+4+
DeveloperAudio Damage, Inc.Kymatica AB

Customer experience

Eos 2

All ratings18 ratings
Positive83.3%
Neutral5.6%
Negative11.1%
Written reviews51 reviews
Positive62.7%
Neutral3.9%
Negative33.3%

AU3FX

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

In-app purchases

None

Eos 2

No in-app purchases

None

AU3FX

No in-app purchases

Questions

Is Eos 2 free?
Eos 2 costs $6.99, with no in-app purchases.
Is AU3FX free?
AU3FX costs $4.99, with no in-app purchases.
Which has better reviews, Eos 2 or AU3FX?
AU3FX is rated higher. Eos 2 averages 4.4 out of 5 from 18 ratings, while AU3FX averages 5.0 from 14 ratings.
Do Eos 2 or AU3FX have ads?
Neither Eos 2 nor AU3FX shows ads.
Which is updated more often, Eos 2 or AU3FX?
Eos 2 ships an update every 15 months, and AU3FX every 6 months. Most recently, Eos 2 was updated on September 26, 2026 and AU3FX on September 21, 2026.

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