JAX ONE XModulator Extended vs VAPolyWest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Analog modeled ring modulator
- Unison oscillator modulation source
- Creative sound design tool
- Special effect processor
- 3D modular rack user interface
- AUv3 app extension
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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.
VAPolyWest
This app is a polyphonic synthesizer inspired by 1960s California west coast synthesis. It features wave folding, lowpass gates, and step sequencers for generative music creation. It functions as a standalone app or an AudioUnit Extension across iPhone, iPad, and Mac.
- Virtual analog west coast style polyphonic synthesizer
- Wave folder and lowpass gate
- Step sequencer and envelope generators
- Up to 8 voice polyphony
- Audio Unit Extension (AUv3) support
- MIDI 2.0 support
- Audio export options
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VAPolyWest is inspired by synthesizers developed in California in the 1960’s. VAPolyWest features wave folder and lowpass gate, which are key components of the west coast synthesis. VAPolyWest also features 5 step sequencer and envelope generators which are designed to create generative music. VAPolyWest works on iPhone, iPad and Mac. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. - Main Features - Virtual analog west coast style polyphonic synthesizer. Maximum 8 voice polyphony. it depends on performance of the device it is running. Wave folder and lowpass gate for West Coast Synthesis. Step sequencer and envelopes designed for generative music. Support MIDI 2.0 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. - 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.
Screenshots
Verdict
The clearest difference is rating: VAPolyWest at 5.0 against JAX ONE XModulator Extended's 4.0. VAPolyWest also leads on review sentiment (75% vs 50%). JAX ONE XModulator Extended's advantage is update cadence (every 4 days vs every 10 months) and price ($12.99 vs $14.99). On ratings volume, ads, in-app purchases 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
JAX ONE XModulator Extended costs $12.99 and VAPolyWest $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
VAPolyWest holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 50% of JAX ONE XModulator Extended's written reviews are positive against 75% of VAPolyWest's.
JAX ONE XModulator Extended ships an update every 4 days, VAPolyWest every 10 months. Both last shipped on November 4, 2026.
| Parameter | JAX ONE XModulator Extended | VAPolyWest |
|---|---|---|
| Price | $12.99 — better | $14.99 |
| Rating | 4.0 (2 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 50.0% of reviews | 75.0% of reviews — better |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 4 days — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 14.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 32 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Guell | Ryo Togawa |
Customer experience
JAX ONE XModulator Extended
VAPolyWest
In-app purchases
JAX ONE XModulator Extended
No in-app purchases
VAPolyWest
No in-app purchases
Questions
Is JAX ONE XModulator Extended free?
Is VAPolyWest free?
Which has better reviews, JAX ONE XModulator Extended or VAPolyWest?
Do JAX ONE XModulator Extended or VAPolyWest have ads?
Which is updated more often, JAX ONE XModulator Extended or VAPolyWest?
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