Comparison

IAP Control vs VAPolyFMWest

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

Head to head
About

IAP Control

Features
Read full description

Illusonic Audio Processor (IAP) is like a Swiss Army Knife for audiophiles. It optimizes almost any sound system, room, and listening situation. IAP Control app allows network-based remote control of IAP. Power On/Off, Input, Volume, and Presets can be set. All detail parameters of the presets can be controlled as well.

About

VAPolyFMWest

This app combines FM and West Coast synthesis with a 4-operator FM engine and wave folder/lowpass gate. It offers a standalone mode with Ableton Link and MIDI support, plus an AudioUnit Extension for iOS and Mac. Includes built-in effects and a step sequencer.

Highlights
  • 4-operator FM synthesizer
  • Wave folder and lowpass gate
  • AudioUnit Extension (AUv3) support
  • Ableton Link and MIDI connectivity
  • Built-in delay, chorus, reverb, EQ, compressor
  • 3-channel step sequencer
  • iCloud Drive project sharing
Features
Read full description

VAPolyFMWest is a combination of FM and West Coast synthesis. It features 4 operator, 8 waveform, 8 algorithm FM synthesizer inspired by iconic rack mount FM synthesizer in 1980’s and wave folder and lowpass gate, which are key components of the west coast synthesis. VAPolyFMWest operates as a stand alone or as an AudioUnit Extension (AUv3) for iPhone, iPad and Mac. Stand Alone supports Ableton Link, MIDI and audio file export. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. Main Features - FM Synthesizer - 4 operators, 8 waveforms and 8 algorithms - Wave folder and lowpass gate - 3 channel analog style step sequencer. - Maximum 8 voice polyphony. it depends on performance of the device it is running. - Built-in effects and piano roll sequencer. - Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) - Support Audio Unit Extension (AUv3). - Support MIDI 2.0. - Support Ableton Link, Bluetooth MIDI, MIDI In / Out. - Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. - Support MIDI Foot Pedal (CC#11, CC#64) - MIDI CC Settings are saved. It will be recovered when the app launched in the next time. - UI Color can be selected from black, navy, gray, blown and red. - Font size for title of controls are adjustable. - Factory Preset 128 - Effects Preset 40 System Requirements - iOS 17.0 or later - Devices with Apple Silicon are recommended. A13 Fusion or above is highly recommended. - AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. - AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension. - Sound may be distorted if CPU of the device doesn't have enough power. If it happens reduce number of voices.

Screenshots

IAP Control2 screens
VAPolyFMWest4 screens

Verdict

The call

The clearest difference is price: IAP Control at Free against VAPolyFMWest's $14.99. IAP Control also leads on iOS requirement (12.0 vs 16.6). VAPolyFMWest's advantage is update cadence (every 4 days vs every 9 months). On ads, in-app purchases 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

IAP Control is free to download; VAPolyFMWest costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

IAP Control ships an update every 9 months, VAPolyFMWest every 4 days. The most recent releases landed on October 26, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 6 level
IAP Control versus VAPolyFMWest: the parameters behind the verdict, then further details
ParameterIAP ControlVAPolyFMWest
PriceFree — better$14.99
Rating—5.0 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 9 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS12.0 — better16.6
Further details — not scored
Size2 MB19 MB
Age rating4+4+
DeveloperIllusonic GmbHRyo Togawa

In-app purchases

None

IAP Control

No in-app purchases

None

VAPolyFMWest

No in-app purchases

Questions

Is IAP Control free?
IAP Control is free to download, with no in-app purchases.
Is VAPolyFMWest free?
VAPolyFMWest costs $14.99, with no in-app purchases.
Do IAP Control or VAPolyFMWest have ads?
Neither IAP Control nor VAPolyFMWest shows ads.
Which is updated more often, IAP Control or VAPolyFMWest?
IAP Control ships an update every 9 months, and VAPolyFMWest every 4 days. Most recently, IAP Control was updated on October 26, 2026 and VAPolyFMWest on November 5, 2026.

Other comparisons