Filterstation2 vs AU3FX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Filterstation2
This app offers a versatile dual filter effect for music production, inspired by classic hardware. It features twelve filter algorithms, an envelope follower, and multiple operating modes for creative sound shaping. Its user-friendly interface and resizable GUI make it a powerful tool for producers.
- Twelve filter algorithms
- Envelope follower with sidechain
- VCA mode for tremolo/gate
- LFO with tempo sync
- Serial, parallel, and stereo modes
- Resizable GUI
- Cross-platform preset manager
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Filterstation 2 is the Audio Damage dual filter, built for sound design and performance rather than corrective EQ. It runs two resonant filters in series, in parallel, or split across the stereo field, with twelve filter algorithms and a full set of modulation tools for movement, distortion, and rhythm. FEATURES Twelve filter algorithms, including our 914 bandpass and Filterpod lowpass models, a clean state-variable filter, and an MS20-style filter, covering lowpass, highpass, bandpass, and notch. Each of the two filter slots can run a different one. Serial, parallel, and true stereo routing. Run the filters one into the next, side by side, or split hard left and right. Envelope follower with stereo sidechain. Drive the cutoff from a signal's own dynamics for auto-wah, or feed in an external source so one track opens the filter on another. LFO with twelve patterns, internal or tempo-synced. VCA mode for tremolo and gating. FSU section for extra signal hacking, for when clean is not the point. Resizable vector interface, sharp on every iPhone and iPad display. Universal preset system. XML-based presets move between iOS and the desktop versions. IN USE... Sweep the cutoff by hand for filter rises and drops. Set the envelope follower to track the input for an auto-wah that moves with your playing. Patch a kick into the sidechain to duck a pad or bassline in time. Run the two filters in series for steep formant shapes, or in parallel for wide dual-band sweeps. Tempo-sync the LFO for rhythmic gating, then bring in the FSU section when the part needs to fall apart. Filterstation 2 runs as an AUv3 plugin inside any compatible iOS host, including AUM, Cubasis, Drambo, apeMatrix, and GarageBand. It is also available for macOS, Windows, and Linux as a desktop plugin, and presets move freely between them. Requires iOS 13 or later. An AUv3 host app is recommended. Features • Twelve different filter algorithms, including MS20 emulation and our classic 914 bandpass and Filterpod lowpass models. • VCA mode for tremolo and gate effects. • LFO with twelve different patterns, and both internal and tempo sync modes. • Envelope follower for dynamic control of filter frequency. • Serial, parallel, and true stereo operating modes. • Easy-to use interface for quick programming. • Vector-based resizable GUI. Use just the filter screen, slide the controls over it, or (in hosts that allow it) open up the whole UI. • Cross-platform XML-based preset manager; copy your desktop presets to the iOS version using Handoff, or share them with your friends and in forums. • Full PDF manual available at Support link.
AU3FX
A powerful 4-band parametric stereo equalizer AUv3 plugin for iOS. It offers detailed frequency control, real-time spectrum analysis, and customizable presets for subtle enhancements or aggressive sound shaping. Load it within compatible music apps to enhance your audio.
- 4-band parametric stereo equalizer
- High quality 32-bit DSP engine
- Interactive frequency response curve
- Real-time FFT spectrum analyzer
- Bundled presets and user preset saving
- Multiple instances and external control
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A versatile 4-band parametric stereo equalizer AUv3 plugin for everything between subtle frequency enhancements to agressive boosting/cutting or special resonator effects. This app is part of the AU3FX series, a collection of simple and powerful audio unit effect plugins. • High quality 32-bit DSP engine. • Two parametric peak filters with gain, frequency and Q. • Low-shelf filter with gain and frequency. • High-shelf filter with gain and frequency. • On/Off toggle for each band. • Interactive frequency response curve with draggable handles. • Real-time FFT spectrum analyzer with pre/post/off switch. • 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). The container app shows the Users Guide. Load the AU3FX:PeakQ inside any music app that supports hosting Audio Unit Extensions to use the plugin.
Screenshots
Verdict
Filterstation2 and AU3FX both sit at 4.4 stars, but that hides the real split: 100% of AU3FX's written reviews are positive against 75% of Filterstation2's. On price, rating, ratings volume 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
Filterstation2 costs $4.99 and AU3FX $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AU3FX holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 18 and 10 respectively. Written reviews point the same way: 75% of Filterstation2's written reviews are positive against 100% of AU3FX's.
| Parameter | Filterstation2 | AU3FX |
|---|---|---|
| Price | $4.99 | $4.99 |
| Rating | 4.4 (18 ratings) | 4.6 (10 ratings) — better |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 18 — better | 10 |
| Update frequency | Every 19 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 29 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Audio Damage, Inc. | Kymatica AB |
Customer experience
Filterstation2
AU3FX
In-app purchases
Filterstation2
No in-app purchases
AU3FX
No in-app purchases









