FAC Polyflo vs GateVerb
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FAC Polyflo
This AUv3 plugin allows you to modulate and sequence MIDI instruments and modular hardware. It outputs both MIDI and analog CV simultaneously, supporting hybrid digital and analog setups. Convert various signals into control voltages for deep and flexible modulation.
- AUv3 plugin for modulation and sequencing
- Outputs MIDI and analog CV simultaneously
- Converts signals to control voltages
- Two LFO generators with syncing
- Integrated envelope follower
- Six FLO(W) processors for signal shaping
- Universal Purchase for iOS, macOS, Vision Pro
Read full descriptionHide full description
• AUv3 plugin to modulate and sequence MIDI instruments and modular hardware • Outputs MIDI and analog CV simultaneously for integrated hybrid setups • Fully functional in software-only environments with full MIDI support • Converts LFOs, MIDI notes, pitch, and control changes into control voltages • Includes two LFO generators with random spline, cross-modulation and syncing • Integrated envelope follower to track audio input or sidechain signal • Six FLO(W) processors for combining and shaping signals with math and logic • Each FLO supports 18 inputs with individual polarity, divider and multiplier • Multi-out support, built-in waveform viewer, Audio FX, and MIDI FX • Advanced Responsive Design, portrait and landscape views • Universal Purchase: AUv3 for iOS (iPad/iPhone), macOS and Vision Pro FAC Polyflo is an AUv3 plugin for modulating and sequencing MIDI instruments and modular gear via control voltage. It outputs MIDI and analog CV simultaneously, making it well-suited for hybrid setups that combine digital and analog equipment. The plugin includes two LFO generators offering 10 waveforms, including classic shapes and random spline, with support for cross-modulation and syncing. It also features an envelope follower that tracks audio FX input or an external sidechain. The generated signals, together with the host clock and MIDI input, are fed into six independent FLO(W) processors. These processors combine, shape, and route inputs using math operations, conditional logic, and comparators. Each FLO includes individual polarity, division, and multiplication controls, providing deep and flexible modulation that balances chaotic creativity with precise timing. Each FLO processor output is connected to its own output bus, enabling easy integration with hardware via DC-coupled audio interfaces like the Expert Sleepers ES-9. For simpler setups, FLO outputs can be routed to the stereo output. FAC Polyflo can also convert MIDI notes, pitch, and control changes into control voltages, making it a powerful MIDI-to-CV solution. If you prefer to work exclusively with software, the plugin runs smoothly in software-only environments with full MIDI support, making it equally suited for purely digital workflows. FAC Polyflo works as both an Audio Unit FX and MIDI FX, featuring a clean, touch-optimized interface with precise control and waveform visualization. It’s available as an AUv3 for iOS (iPad/iPhone), macOS, and Vision Pro, and requires a compatible AUv3 host app to run. This is an AUv3 Effect and requires a compatible host to work The documentation is available at fredantoncorvest.com/FAC_Polyflo.html
GateVerb
This audio effect plugin offers a stereo reverb with a retro sound. It features pre and post-effect filters for tone shaping and a switchable gate for classic gated reverb or reverse reverb effects in real-time. Adjust size, damping, width, and wet/dry levels for customized audio.
- Stereo reverb with retro vibe
- Pre and post-effect filters
- Switchable gate processing
- Gated reverb emulation
- Reverse reverb emulation
- Adjustable reverb size, damping, width
- Adjustable wet/dry signal levels
Read full descriptionHide full description
GateVerb Gated Reverb Plugin (AUv3) GateVerb is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro or GarageBand. Overview GateVerb is a super-simple and CPU-friendly stereo reverb with a retro vibe. Pre and post-effect filters provide additional tone-shaping, and the switchable gate processing stage allows the recreation of the gated reverb sound made famous on many an 80's hit, as well as an emulation of a "reverse reverb" effect in realtime. And of course, you can simply switch off the gate, for those times when you just need a straightforward no-frills reverb. Controls Active - Toggles the effect On or Off. You can use this control to A/B your settings with the original signal and this will fade gradually between the two with no distracting pops or clicks! Reverb Controls Size - Varies the size of the emulated reverb from a small room to very large hall. Damping - Varies the amount of high frequency damping applied to the reverb tail. As damping is increased, the reverb effect becomes "softer". Width - Sets the stereo spread of the generated reverb from mono, to wide stereo. Wet - Sets the level of the generated reverb, including the filter processing. Dry - Sets the level of the dry / incoming audio signal. Filter Controls HPF - Sets the cutoff frequency of a high-pass filter, which is applied to the signal sent into the reverb processing. LPF - Sets the cutoff frequency of a low-pass filter, which is applied to the output of the reverb processing. Gate Controls Gate - Turns the gate processing stage On or Off. Like the Active control, this is a "soft" switch so you can A/B the effect. The gate processing is applied to the wet / reverb signal only. Smoothing - Sets how fast the gate processing responds to changes in the input signal. Lower settings correspond to a fast response time, whereas higher settings introduce a lag or damping effect to the responsiveness of the gate. Note that the smoothing time also affects the Attack and Release times, so if you need a really slow attack, try increasing the Smoothing too. Threshold - Sets the signal level required to "open" the gate. Note - If set too high, you might not hear any reverb at all, and if set too low, no gating effect will occur as the signal will be loud enough to keep the gate open all the time. Attack - Sets how quickly the gate opens once triggered. At the zero setting, the gate will open immediately, otherwise it opens up gradually, which can be used to create a swell / pseudo-reverse reverb effect. Sometimes, just having a little bit of a swell prevents the reverb from masking the attack of the dry signal which helps retain clarity. Alternatively, ramp-up the attack for spooky vocal effects! Release - Sets how quickly the gate closes after the attack stage. At zero, it will close very quickly, depending on the Response settings. Longer release times can be quite subtle and allows for some fine-tuning of the reverb tail. Somewhere in the middle is the classic 80's drum type gated reverb effect. For more info and support please visit: www.waverley-instruments.com/robjackson
Screenshots
Verdict
The clearest difference is price: GateVerb at $1.99 against FAC Polyflo's $9.99. GateVerb also leads on in-app purchases (none vs 3) and chart position (#186 vs unranked). FAC Polyflo's advantage is ratings volume (11 vs 3). On rating, review sentiment, ads 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
FAC Polyflo costs $9.99 and GateVerb $1.99 up front. FAC Polyflo sells 3 one-off in-app purchases. GateVerb asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for FAC Polyflo against 5.0 for GateVerb. Both are backed by a comparable volume of ratings — 11 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | FAC Polyflo | GateVerb |
|---|---|---|
| Price | $9.99 | $1.99 — better |
| Rating | 4.9 (11 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 11 — better | 3 |
| Update frequency | — | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | — | #186 — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederic Corvest | Rob Jackson |
Customer experience
FAC Polyflo
GateVerb
In-app purchases
FAC Polyflo
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$14.99
GateVerb
No in-app purchases








