# JAX ONE XModulator Extended vs VAPolyWest

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.

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.

## The numbers

| Metric | JAX ONE XModulator Extended | VAPolyWest |
| --- | --- | --- |
| Price | **$12.99** | $14.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/jax-one-xmodulator-extended/id6505114652/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/vapolywest/id6587550154/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | 50.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 10 months |
| Monetization | Paid | Paid |
| Size | 32 MB | 15 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Jens Guell](https://appshunter.io/developer/1195004865) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## What reviewers say

### JAX ONE XModulator Extended

[App page](https://appshunter.io/ios/app/jax-one-xmodulator-extended/id6505114652)

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:** macOS Compatibility

**In-app purchases:** none


### VAPolyWest

[App page](https://appshunter.io/ios/app/vapolywest/id6587550154)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JAX ONE XModulator Extended free?

JAX ONE XModulator Extended costs $12.99, with no in-app purchases.

### Is VAPolyWest free?

VAPolyWest costs $14.99, with no in-app purchases.

### Which has better reviews, JAX ONE XModulator Extended or VAPolyWest?

VAPolyWest is rated higher. JAX ONE XModulator Extended averages 4.0 out of 5 from 2 ratings, while VAPolyWest averages 5.0 from 5 ratings.

### Do JAX ONE XModulator Extended or VAPolyWest have ads?

Neither JAX ONE XModulator Extended nor VAPolyWest shows ads.

### Which is updated more often, JAX ONE XModulator Extended or VAPolyWest?

JAX ONE XModulator Extended ships an update every 4 days, and VAPolyWest every 10 months. Most recently, JAX ONE XModulator Extended was updated on November 4, 2026 and VAPolyWest on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*