Comparison

VAPolyQuad vs JAX ONE XModulator Extended

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

Head to head
About

VAPolyQuad

Create rich, analog-style music with this powerful polyphonic synthesizer. Explore a vast array of sound-shaping tools, including multiple oscillators, filters, and effects. Program intricate melodies and rhythms with the built-in sequencer, and seamlessly share projects across your Apple devices.

Highlights
  • Virtual analog polyphonic synthesizer
  • Up to 8 voice polyphony
  • Four oscillators per voice
  • Multiple resonant filters
  • Built-in effects suite
  • 16-bar sequencer with piano roll
  • Audio Unit Extension (AUv3) support
Features
Read full description

VAPolyQuad is a virtual analog polyphonic synthesizer for iPhone, iPad and Mac. It features 8 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. Single voice of the synthesizer features four oscillators, two mixers, two resonant high pass filters, two resonant low pass filters, two amplifiers, four ADSR envelopes and four LFOs. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit and cascaded OTA filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and parameter automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. - Main Features - Virtual analog polyphonic synthesizer. Maximum 8 voice polyphony. it depends on performance of the device it is running. Four oscillators per voice. Flexible audio signal and control signal routing. Keyboard Control Routing Two type of Lowpass filter, cascaded OTA model and Sallen-key model. Support MIDI 2.0 New User Interface built by SwiftUI for improved performance. Built-in Sequencer. 16 bar patterns per clip. Total 8 clips. Piano Roll and Parameter automation. Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Ableton Link, Bluetooth MIDI, MIDI In / Out. 370 Factory Presets - System Requirements - A13 Fusion or above is 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.

About

JAX ONE XModulator Extended

This app offers a classic ring modulator effect with an analog-modeled unison oscillator for sound modulation and sonic refinement. It functions as a creative sound design tool and special effect processor with a unique 3D modular rack interface.

Highlights
  • Analog modeled ring modulator
  • Unison oscillator modulation source
  • Creative sound design tool
  • Special effect processor
  • 3D modular rack user interface
  • AUv3 app extension
Features
Read full description

The JAX ONE series is a new collection of analog modelled audio units (AUV3 app extensions), available on all Apople Silicon platforms and devices. JAX ONE XModulator Extended is a classic ring modulator effect with integration of an analog modelled unison oscillator as modulation source and some further extensions for sound modulation and sonic refinement. It can be used as a creative sound creation tool and special effect processor. It features a freely navigatable 3D user interface in the style of a modular rack synthesizer. A video demonstration is available at : https://youtu.be/Zxw67vlKowQ?si=khKl64aPgyNRW8sr The manual can be found here : https://audio.digitster.com/wp-content/uploads/2024/07/JAX-ONE-XModulator-Extended.pdf This build is truly 'universal', meaning, unit is available for: - MacOS (Silicon) - iOS (iPhone) - iPadOS (iPads) - visionOS (Apple Vision Pro) Please note, that AudioUnits (AUv3) require a supporting host application to perform.

Screenshots

VAPolyQuad4 screens
JAX ONE XModulator Extended4 screens

Verdict

The call

VAPolyQuad and JAX ONE XModulator Extended both sit at 4.0 stars, but that hides the real split: 50% of JAX ONE XModulator Extended's written reviews are positive against 0% of VAPolyQuad's. JAX ONE XModulator Extended also leads on update cadence (every 4 days vs every 22 months) and price ($12.99 vs $14.99). On rating, ratings volume, ads and in-app purchases 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

VAPolyQuad costs $14.99 and JAX ONE XModulator Extended $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for VAPolyQuad against 4.0 for JAX ONE XModulator Extended. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews are what separate them: 0% of VAPolyQuad's written reviews are positive against 50% of JAX ONE XModulator Extended's.

UpkeepUpdate frequency

VAPolyQuad ships an update every 22 months, JAX ONE XModulator Extended every 4 days. The most recent releases landed on September 22, 2026 and September 15, 2026 respectively.

Scorecard4 real differences · 6 level
VAPolyQuad versus JAX ONE XModulator Extended: the parameters behind the verdict, then further details
ParameterVAPolyQuadJAX ONE XModulator Extended
Price$14.99$12.99 — better
Rating4.0 (5 ratings)4.0 (2 ratings)
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings5 — better2
Update frequencyEvery 22 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.614.0 — better
Further details — not scored
Size16 MB32 MB
Age rating4+4+
DeveloperRyo TogawaJens Guell

Customer experience

VAPolyQuad

All ratings5 ratings
Positive60.0%
Neutral20.0%
Negative20.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

JAX ONE XModulator Extended

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

None

VAPolyQuad

No in-app purchases

None

JAX ONE XModulator Extended

No in-app purchases

Questions

Is VAPolyQuad free?
VAPolyQuad costs $14.99, with no in-app purchases.
Is JAX ONE XModulator Extended free?
JAX ONE XModulator Extended costs $12.99, with no in-app purchases.
Which has better reviews, VAPolyQuad or JAX ONE XModulator Extended?
VAPolyQuad and JAX ONE XModulator Extended are both rated 4.0 out of 5 on the App Store, from 5 and 2 ratings respectively.
Do VAPolyQuad or JAX ONE XModulator Extended have ads?
Neither VAPolyQuad nor JAX ONE XModulator Extended shows ads.
Which is updated more often, VAPolyQuad or JAX ONE XModulator Extended?
VAPolyQuad ships an update every 22 months, and JAX ONE XModulator Extended every 4 days. Most recently, VAPolyQuad was updated on September 22, 2026 and JAX ONE XModulator Extended on September 15, 2026.

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