RF vs Filterstation2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RF
This app offers a versatile collection of algorithmic reverbs for creating diverse soundscapes, from intimate rooms to expansive modulated spaces. It features multiple reverb programs, extensive tweakable controls, and seamless integration with various audio hosts and interfaces.
- Multiple reverb programs
- Continuously variable size
- Variable pre-delay
- Diffusion and damping controls
- Modulation section
- AudioUnitV3, Inter-App Audio, Audiobus support
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RF-1 - Algorithmic Reverb (AU, AB, IAA, Standalone) RF-1 is a collection of algorithmic reverbs capable of creating a variety of effects ranging from small rooms to huge, heavily modulated spaces and everything in between. RF-1 comes packed with multiple reverb algortihms, a solid standalone application, carfully tuned factory presets and a plethora of tweak-able controls. What's more, RF-1 integrates with everything from AudioUnit Hosts over Audiobus to Inter-App Audio, Guitar- and USB Interfaces. Features: * 5 unique reverb programs (see below) * Continuously variable size * Variable pre-delay * Diffusion control * Damping control * Width control * High- and Low shelves (+/- 6db pre effect) * Mod section with depth and speed controls (Sine LFO 0.01hz to 5.0hz) Programs: 1. Hall Clean and bright sounding space with subtile modulation and gradually building density. 2. Plate Dark, highly diffused sound with high initial echo density and dark modulation. 3. EnsembleVerb Capable of huge, wide spaces with deep modulation. 4. TremoloVerb Large, bright and always moving with amplitude modulation at the output. 5. VintageVerb Dark, noisy and wonderfull sounding reverb modeled after the first digital reverbs from the late 70s. (10khz bandwidth / 12bit processing) Connectivity: * AudioUnitV3 Effect * Inter-App Audio Effect * Audiobus (Filter) * Ableton Link * USB Audio Interface (Standalone) * Guitar Interface (Standalone) * Microphone (Standalone)
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.
Screenshots
Verdict
The clearest difference is update cadence: RF at every 8 months against Filterstation2's every 19 months. RF also leads on price ($2.99 vs $4.99) and iOS requirement (9.0 vs 12.0). Filterstation2's advantage is review sentiment (75% vs 67%). On rating, ratings volume, 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
RF costs $2.99 and Filterstation2 $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.6 for RF against 4.4 for Filterstation2. Both are backed by a comparable volume of ratings — 12 and 18 respectively. Written reviews are what separate them: 67% of RF's written reviews are positive against 75% of Filterstation2's.
RF ships an update every 8 months, Filterstation2 every 19 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | RF | Filterstation2 |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 4.6 (12 ratings) — better | 4.4 (18 ratings) |
| Positive reviews | 66.7% of reviews | 75.0% of reviews — better |
| Number of ratings | 12 | 18 — better |
| Update frequency | Every 8 months — better | Every 19 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 15 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Aras | Audio Damage, Inc. |
Customer experience
RF
Filterstation2
In-app purchases
RF
No in-app purchases
Filterstation2
No in-app purchases









