TfxReverb vs sumFX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
sumFX
This app is a versatile audio effects processor for musicians. It offers a modular design with multiple high-quality FX modules and customizable slots, allowing for quick creation of unique sounds. Focus on your music with intuitive controls and visual feedback.
- Modular multi-FX processor
- 8 high-quality FX modules
- 8 FX slots with Wet/Dry control
- 2 LFOs per slot
- 50+ cross-platform presets
- Pre/post waveform view
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sumFX is a modular multi-FX processor for Mac/PC and iOS. Designed with simplicity in mind, to help keep you focused on the music and the sum of your efforts. Packed with 8 high quality FX modules and an available 8 slots, each loaded with Wet/Dry control, Global Wet/Dry, and 2 LFOs per slot, creating new unique sounds is quick and easy. 50+ cross-platform slot & chain presets are included to get you to any sound you need quickly and we’ve packed in an easy to use pre/post waveform view to help keep you focused on the result of your FX. Modules: -syncDynamics - Multimode dynamic FX with BPM sync attack/release (Noise Gate, Expander, Compressor, Limiter) -stereoFilter - Stereo filter with link or individual channel controls (LPF12, HPF12, BPF12, LPF24, HPF24, BPF24, Notch, & Formant options). -variMod - Multimode modulation FX with stereo offset (Chorus, Flanger, Vibrato, Phaser, Tremolo, & Auto Pan) -EQuator - Full high quality EQ module (3 Parametric Bands, High/Low Shelf, & HPF/LPF). -frostReverb - Multi-Mode (Original, Plate, Spring, Room) Stereo Reverb. -bucketDelay - Stereo Analog Style Delay with individual channel control. -variPitch - Stereo Pitch Shifter with 3X Modes (Doubler, Harmonizer, & Full Control) -powerPhase - Multimode Saturation, Utility Gain In/Out, Mono Maker, Channel msDelay, & Phase inverter.
Screenshots
Verdict
The clearest difference is price: TfxReverb at $1.99 against sumFX's $9.99. TfxReverb also leads on review sentiment (75% vs 55%). On rating, ratings volume, update cadence 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
TfxReverb costs $1.99 and sumFX $9.99 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 — 4.5 for TfxReverb against 4.4 for sumFX. Both are backed by a comparable volume of ratings — 8 and 12 respectively. Written reviews are what separate them: 75% of TfxReverb's written reviews are positive against 55% of sumFX's.
TfxReverb ships an update every 10 months, sumFX every 6 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | TfxReverb | sumFX |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | 4.5 (8 ratings) — better | 4.4 (12 ratings) |
| Positive reviews | 75.0% of reviews — better | 54.5% of reviews |
| Number of ratings | 8 | 12 — better |
| Update frequency | Every 10 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryo Togawa | OSC Audio |
Customer experience
TfxReverb
sumFX
In-app purchases
TfxReverb
No in-app purchases
sumFX
No in-app purchases









