FD vs TfxReverb
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FD
This app is a semi-modular audio effect plugin featuring dedicated filter, delay, and modulation sections. It allows for the creation of rhythmic filter sequences and a wide range of complex audio effects through its flexible modulation matrix.
- Semi-modular effect plugin
- Modulated filter section
- Delay stage
- Step sequencer
- Low Frequency Oscillator
- Mod matrix
- Tempo sync
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FD-1 is a Semi-Modular Effect Plugin including dedicated Filter, Delay and Modulation sections. At it's core, FD-1 is designed to create filter rythms and grooves by first sending the signal through a modulated filter section before feeding it to a delay stage but it goes much further than that. Built-in Step Sequencer and Low Frequency Oscillator serve as modulation sources and are ideal for creating rythmic filter sequences either free running or tempo-synced to a host application. However, due it's semi modular nature, not just filter cutoff but every control within FD-1 can be a modulation target allowing for an increased range effects and combinations ranging from Chorus and Flanger type effects over Analog and Tape Style echos to complex Stutter and Repeat effects. Overview: - VA Multi Mode Filter with 2 & 4 Pole options - Digital Stereo Delay with Tempo Sync and Time Range Control - Analog Style Step Sequencer - Low Frequency Oscillator - Easy to use Mod Matrix - Input Low-Cut and Drive Controls - Individual Return Levels for Filter and Delay Connectivity: - Standalone - AUv3 - IAA - AudioBus (Filter) MIDI: - Tempo Sync - CC Control Requirements: - iOS9+ - iPad 4th generation or newer
TfxReverb
This audio plugin generates digital reverb effects using a unique algorithm. It offers simple operation with an auto-size mode that adjusts parameters with a single dial, and features delay lines inspired by vintage bucket brigade devices for creative pitch-shifting.
- AudioUnit Extension plugin
- BBD-inspired delay lines
- Adjustable input filters
- LFO modulation
- Tempo sync
- Auto size mode
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TfxReverb is a reverb effect AudioUnit Extension plugin. It uses algorithm to generate digital reverb sound. TfxReverb is designed for simple and easy operation. When auto size mode is enabled, number of parameters can be controlled by a single dial to adjust size of the reverb sound, which can be synced to tempo. It features delay lines which are inspired by BBD (bucket brigade device). The delay line uses fixed length buffer and an artificial clock to sample input signal in variable sampling rate. When the delay time is changed, the delay line can produce pitch change effect which is similar to the behavior of the BBD based unit. Features AudioUnit Extension - Input lowpass filter: From 1KHz to 20KHz - Input high-pass filter: From 20Hz to 500Hz - LFO Frequency: From 0.01Hz to 10Hz - LFO Intensity: From 0.0 to 1.0 - Pre Delay: From 1ms to 100ms - Size: From 0% to 100% - Auto size mode: On / Off - Decay: From 0% to 100% - Damp: From 0% to 100% - Output Lowpass Filter: From 1KHz to 20KHz - Early/Late Mix: From 0% to 100% - Dry/Wet Mix: From 0% to 100% - Tempo Sync: On / Off - Tempo (manual) : From 1bpm to 999bpm - Effect Switch: On / Off Host Application Host application uses system audio input as an audio source and processed audio signal is routed to the system audio output.
Screenshots
Verdict
The clearest difference is price: TfxReverb at $4.99 against FD's $9.99. TfxReverb also leads on review sentiment (75% vs 67%). FD's advantage is update cadence (every 4 months vs every 10 months) and ratings volume (32 vs 8). On rating, 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
FD costs $9.99 and TfxReverb $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 FD against 4.5 for TfxReverb. Both are backed by a comparable volume of ratings — 32 and 8 respectively. Written reviews are what separate them: 67% of FD's written reviews are positive against 75% of TfxReverb's.
FD ships an update every 4 months, TfxReverb every 10 months. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.
| Parameter | FD | TfxReverb |
|---|---|---|
| Price | $9.99 | $4.99 — better |
| Rating | 4.6 (32 ratings) — better | 4.5 (8 ratings) |
| Positive reviews | 66.7% of reviews | 75.0% of reviews — better |
| Number of ratings | 32 — better | 8 |
| Update frequency | Every 4 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.6 |
| Further details — not scored | ||
| Size | 61 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Aras | Ryo Togawa |
Customer experience
FD
TfxReverb
In-app purchases
FD
No in-app purchases
TfxReverb
No in-app purchases









