Comparison

Polythemus AU vs FAC Polyflo

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

Head to head
About

Polythemus AU

This app transforms MIDI chords into individual monophonic MIDI channels. It allows you to create polyphonic synthesizers from monophonic ones, add rhythmic variations to sequences, and control external hardware synths. It offers individual voice management for number of voices, muting, velocity scaling, and transposition.

Highlights
  • Create polyphonic synths from monophonic ones
  • Stack synths for variation
  • Add timbre and rhythm variations
  • Control external hardware synths
  • Voice allocation and management
  • MIDI velocity scaling per voice
  • Transpose MIDI output per voice
Read full description

Polythemus AUv3 Midi was created for five main uses: • Creating a polyphonic synth from individual monophonic synths • Stacking different or similar synths that play alternatively for variation • Interesting variations in timbre & rhythms by having multiple synths driven with a sequencer (e.g. Quantum) or arpeggiator • work outside IOS on hardware synths • voice allocation of externally hosted software vst(e.g. Logic or Ableton Live) using mac osx IDAM for direct device to mac midi Polythemus turns your midi chords into mono midi channels so you can allocate polyphonic notes (i.e. chords) into different synth patches. Load up multiple mono synths to turn them into one polyphonic synth. Add variation to sequences and arpeggios by varying synth patches slightly or even extremely. Individual control on number of voices and quick mute/unmute per voice. Midi velocity scaling per voice for volume balancing. Transpose midi output per voice to allow more compact keyboard playing & voice balancing. Option to use just one midi output with midi channels for hosts that don't yet support multi-output midi effect apps. Universal app for iPhone & iPad devices online manual here: http://amssoftware.org/manual/PolythemusManual.pdf Polythemus requires an AUv3 host that supports midi effects (like AUM) - the standalone version contains the manual

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

Screenshots

Polythemus AU2 screens
FAC Polyflo3 screens

Verdict

The call

The clearest difference is review sentiment: FAC Polyflo at 100% against Polythemus AU's 57%. FAC Polyflo also leads on rating (4.9 vs 4.4). Polythemus AU's advantage is in-app purchases (none vs 3) and price ($3.99 vs $9.99). On ratings volume, ads, monetization model and device support 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

Polythemus AU costs $3.99 and FAC Polyflo $9.99 up front. FAC Polyflo sells 3 one-off in-app purchases. Polythemus AU asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FAC Polyflo holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 7 and 11 respectively. Written reviews point the same way: 57% of Polythemus AU's written reviews are positive against 100% of FAC Polyflo's.

Scorecard5 real differences · 5 level
Polythemus AU versus FAC Polyflo: the parameters behind the verdict, then further details
ParameterPolythemus AUFAC Polyflo
Price$3.99 — better$9.99
Rating4.4 (7 ratings)4.9 (11 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings711 — better
Update frequencyFortnightly—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS11.0 — better16.4
Further details — not scored
Size15 MB5 MB
Age rating4+4+
Developeranthony saundersFrederic Corvest

Customer experience

Polythemus AU

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews7 reviews
Positive57.1%
Neutral14.3%
Negative28.6%

FAC Polyflo

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

In-app purchases

None

Polythemus AU

No in-app purchases

3 purchases

FAC Polyflo

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$14.99

Questions

Is Polythemus AU free?
Polythemus AU costs $3.99, with no in-app purchases.
Is FAC Polyflo free?
FAC Polyflo costs $9.99, and also offers in-app purchases.
Which has better reviews, Polythemus AU or FAC Polyflo?
FAC Polyflo is rated higher. Polythemus AU averages 4.4 out of 5 from 7 ratings, while FAC Polyflo averages 4.9 from 11 ratings.
Do Polythemus AU or FAC Polyflo have ads?
Neither Polythemus AU nor FAC Polyflo shows ads.

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