Comparison

Eos 2 vs Harmonic Exciter AUv3 Plugin

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
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

Harmonic Exciter AUv3 Plugin

Enhance your audio mixes by adding clarity and edge to sounds. This plugin synthesizes additional harmonics to make instruments cut through, simulate saturation, and achieve a more pleasing tonal content than traditional EQ.

Highlights
  • Adds clarity and edge to audio
  • Synthesizes additional harmonics
  • Simulates valve/transistor saturation
  • Visualizes incoming audio spectrum
  • Adjustable harmonic sliders
  • Phase manipulation
Currently charting
Read full description

Harmonic Exciter is an AUv3 Compatible plugin for your favourite DAW such as Cubasis, Auria, AUM, Meteor, BM3 or GarageBand etc. The main purpose of a Harmonic Exciter is to help instruments cut through a mix and give some edge and clarity to a sound by adding additional harmonics. It can even be used to simulate valve / transister based saturation or overdriven harmonic distortion. How it works: Every sound under the sun can be constructed by a series of sine waves, the root sine wave denotes the fundamental percieved frequency or the series of waves. By adding additional harmonics which are simply multiples of the fundamental frequency you can turn say a simple sine wave into a square or sawtooth wave. For those who know anything about synthesis you will know these complex waves pack more punch and brightness for the same volume level. So by adding additional harmonics we can lift a sound and make it appear louder, brighter and stand our in our mix. It can also be used to saturate say a bass frequency range boosting bass without needing additional EQ which simple boosts existing harmonics and oftern requires compression to keep under control. This makes the harmonic exciter a great tool for that perfect mix and a nifty trick audio engineers have been using for decades. In Practice: The 4Pockets Harmonic Exciter allows you to visually see the incoming audio spectrum broken down into frequency bands so that you can immediately see any deficiencies in the mix. You can select a frequency range (whether bass, mid, high or even say a kick drum) and use the 10 harmonic sliders to dynamically synthesize of additional harmonics and phase manipulation. Generally it's the 'odd' harmonics that effect a mix in a more melodic way (1st, 3rd, 5th etc.), while even harmonics (2nd, 4th, 6th etc.) tend to be a little discordant or can be used to mimmic distortion of valve amps etc. When adding saturation in this way you can create simulate pleasing overdriven valve/transistor type amplification (transistor amps generally only apply odd harmonics). Why is a Harmonic Exciter better than EQ: While you can boost EQ using a Graphic or Parametric EQ, this only boosts existing harmonics which soon requires compression to avoid clipping. The Harmonic Exciter changes the tonal content of a sound to saturate without adding the same boost in volume. The result is more punch and an ability to cut through the mix without levels getting out of control. You can often get a more natural and aurally pleasing saturation from this kind of effect than using a dedicated oversdrive effects. If your DAW supports MIDI based effects you can also control certain features via CC controllers or using the pitch bend and mod wheel (or CC's 20, 21 and 22 to control the exciter window, gain and size).

Screenshots

Eos 22 screens
Harmonic Exciter AUv3 Plugin2 screens

Verdict

The call

The clearest difference is rating: Eos 2 at 4.4 against Harmonic Exciter AUv3 Plugin's 3.4. Eos 2 also leads on review sentiment (63% vs 50%) and price ($6.99 vs $8.99). Harmonic Exciter AUv3 Plugin's advantage is update cadence (every 9 days vs every 15 months) and chart position (#182 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 Harmonic Exciter AUv3 Plugin $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Eos 2 holds the better App Store score, 4.4 against 3.4. Both are backed by a comparable volume of ratings — 18 and 8 respectively. Written reviews point the same way: 63% of Eos 2's written reviews are positive against 50% of Harmonic Exciter AUv3 Plugin's.

UpkeepUpdate frequency

Eos 2 ships an update every 15 months, Harmonic Exciter AUv3 Plugin every 9 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 5 level
Eos 2 versus Harmonic Exciter AUv3 Plugin: the parameters behind the verdict, then further details
ParameterEos 2Harmonic Exciter AUv3 Plugin
Price$6.99 — better$8.99
Rating4.4 (18 ratings) — better3.4 (8 ratings)
Positive reviews62.7% of reviews — better50.0% of reviews
Number of ratings18 — better8
Update frequencyEvery 15 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#182 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.09.3 — better
Further details — not scored
Size27 MB9 MB
Age rating4+4+
DeveloperAudio Damage, Inc.4Pockets.com

Customer experience

Eos 2

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

Harmonic Exciter AUv3 Plugin

All ratings8 ratings
Positive62.5%
Neutral0.0%
Negative37.5%
Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Eos 2

No in-app purchases

None

Harmonic Exciter AUv3 Plugin

No in-app purchases

Questions

Is Eos 2 free?
Eos 2 costs $6.99, with no in-app purchases.
Is Harmonic Exciter AUv3 Plugin free?
Harmonic Exciter AUv3 Plugin costs $8.99, with no in-app purchases.
Which has better reviews, Eos 2 or Harmonic Exciter AUv3 Plugin?
Eos 2 is rated higher. Eos 2 averages 4.4 out of 5 from 18 ratings, while Harmonic Exciter AUv3 Plugin averages 3.4 from 8 ratings.
Do Eos 2 or Harmonic Exciter AUv3 Plugin have ads?
Neither Eos 2 nor Harmonic Exciter AUv3 Plugin shows ads.
Which is updated more often, Eos 2 or Harmonic Exciter AUv3 Plugin?
Eos 2 ships an update every 15 months, and Harmonic Exciter AUv3 Plugin every 9 days. Most recently, Eos 2 was updated on October 24, 2026 and Harmonic Exciter AUv3 Plugin on October 25, 2026.

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