Comparison

FAC Polyflo vs PolyDelay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read 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

About

PolyDelay

This audio effect plugin creates unique polyrhythmic delays and familiar delay patterns. It syncs to host tempo and offers advanced tone-shaping options like filters and modulation.

Highlights
  • Polyrhythmic delay calculations
  • Host tempo sync
  • Dual delay lines
  • Stereo width control
  • High and low pass filters
  • Stereo modulation
  • Internal limiting
Read full description

PolyDelay Polyrhythmic Delay Plugin (AUv3) PolyDelay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro or GarageBand. Overview PolyDelay is a dual delay line / stereo effect with optional host tempo sync. While PolyDelay can be used to create interesting stereo polyrhythmic delays, it can also produce more familiar delay patterns such as dotted eighth and quarter note triplets. Polyrhythms, Divisions and Beats PolyDelay calculates delay times based on a BPM (beats per minute) tempo, and the polyrhythmic notation of D:B, where D = divisions and B = beats. For example, 3:2 would mean that the time for 2 beats should be divided by 3. If you're more use to the idea of note lengths and delay times, such as quarter notes and dotted eighths, etc., this might be confusing at first, but hopefully this guide will help. Firstly, everything starts with the beat! So, for 120BPM, each beat (or quarter note) will be half a second, or 500ms. So if you want a quarter note delay, you want 1 division within one beat, so you would set Divs and Beats to 1. Here are some typical note values, lengths (120BPM) and their D:B values: 1/4 = 500ms = 1:1 (take the length of one beat, and divide that by one) 1/8 = 250ms = 2:1 (take the length of one beat, and divide that by two) 1/16 = 125ms = 4:1 (etc.) 1/32 = 63ms = 8:1 (etc.) See how the divisions are doubled-up for each note? And here are some dotted and triplet note examples - see how the D:B numbers start to get interesting! 1/4D = 750ms = 2:3 1/4T = 333ms = 3:2 1/8D = 375ms = 4:3 1/8T = 167ms = 3:1 A classic stereo delay would be 1:1 (1/4) left, and 4:3 (1/8D) right with Width set to max. If you want a really long delay, a 1:8 setting would give you 4 seconds at 120BPM with Multiply set to Normal, or 8 seconds set to Half. The Presets also include some typical (and not so typical!) examples to get you started. The fun really starts when you start mixing "unusual" (typically odd numbers) divisions and beats, such as 5:4 or 2:7. These sorts of relationships are what we typically refer to as polyrhythms. Try experimenting with PolyDelay on simple sequences and drum parts / patterns and you may start to hear all sorts of interesting rhythmic interplay as your brain tries to figure out what's going on! For additional tone-shaping, PolyDelay includes variable stereo width, a high and low pass filter, stereo modulation and internal limiting to keep audio levels in check. For more info and support please visit: www.waverley-instruments.com/robjackson

Screenshots

FAC Polyflo3 screens
PolyDelay4 screens

Verdict

The call

The clearest difference is price: PolyDelay at $1.99 against FAC Polyflo's $9.99. PolyDelay also leads on in-app purchases (none vs 3) and iOS requirement (12.0 vs 16.4). 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

CostPrice · In-app purchases · Ads · Monetization

FAC Polyflo costs $9.99 and PolyDelay $1.99 up front. FAC Polyflo sells 3 one-off in-app purchases. PolyDelay asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for FAC Polyflo against 5.0 for PolyDelay. Both are backed by a comparable volume of ratings — 11 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Scorecard4 real differences · 6 level
FAC Polyflo versus PolyDelay: the parameters behind the verdict, then further details
ParameterFAC PolyfloPolyDelay
Price$9.99$1.99 — better
Rating4.9 (11 ratings)5.0 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings11 — better3
Update frequency—Every 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS16.412.0 — better
Further details — not scored
Size5 MB13 MB
Age rating4+4+
DeveloperFrederic CorvestRob Jackson

Customer experience

FAC Polyflo

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PolyDelay

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

FAC Polyflo

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$14.99
None

PolyDelay

No in-app purchases

Questions

Is FAC Polyflo free?
FAC Polyflo costs $9.99, and also offers in-app purchases.
Is PolyDelay free?
PolyDelay costs $1.99, with no in-app purchases.
Which has better reviews, FAC Polyflo or PolyDelay?
PolyDelay is rated higher. FAC Polyflo averages 4.9 out of 5 from 11 ratings, while PolyDelay averages 5.0 from 3 ratings.
Do FAC Polyflo or PolyDelay have ads?
Neither FAC Polyflo nor PolyDelay shows ads.

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