Comparison

Stereo Modulator 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

Stereo Modulator

This audio effect plugin transforms mono sound into stereo, adding width and depth. It uses micro-delays to create a natural sense of space, with optional LFO modulation for a Leslie speaker-like effect without pitch shifting. Ideal for creating separation in mixes, especially for guitars and vocals.

Highlights
  • Mono to stereo conversion
  • Adjustable stereo width
  • Optional LFO modulation
  • Micro-delay de-correlators
  • Creates natural spatial depth
  • No pitch shifting or echo
Features
Read full description

Stereo Modulator is an AU3 effect that converts mono sound into stereo, with an adjustable width and optional LFO modulation. It works by using a bank of randomized stereo de-correlators that apply micro-delays to introduce random differences between the spectrums of the left and right audio channels. In its output we hear a natural sense of space that is not present in mono recordings. It's similar to the sound space one gets from using a stereo reverb plugin except that it is tight and clear, without echo. It can operate either as a static effect or it can be gently modulated by a low-frequency oscillator. The modulation is akin to the sound of a Leslie speaker, except that it doesn't do any pitch shifting, so the output remains focused and tuning is not compromised. This effect is especially useful for mixing overdriven electric guitar sounds together with vocals. Using Stereo Modulator on the guitars, we can push them out to the sides, creating a space in the centre for the vocal to cut through, without needing to reduce the volume of the guitars. NOTE: Stereo Modulator is an AU3 plugin only, not a standalone app. To use it, you will need an audio unit host app such as Garageband or Audiobus.

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

Stereo Modulator3 screens
JAX ONE XModulator Extended4 screens

Verdict

The call

The clearest difference is review sentiment: Stereo Modulator at 100% against JAX ONE XModulator Extended's 50%. Stereo Modulator also leads on price ($2.99 vs $12.99) and rating (5.0 vs 4.0). JAX ONE XModulator Extended's advantage is update cadence (every 4 days vs every 3 months). 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

CostPrice · In-app purchases · Ads · Monetization

Stereo Modulator costs $2.99 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

Stereo Modulator holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 100% of Stereo Modulator's written reviews are positive against 50% of JAX ONE XModulator Extended's.

UpkeepUpdate frequency

Stereo Modulator ships an update every 3 months, JAX ONE XModulator Extended every 4 days. The most recent releases landed on August 30, 2026 and September 15, 2026 respectively.

Scorecard5 real differences · 5 level
Stereo Modulator versus JAX ONE XModulator Extended: the parameters behind the verdict, then further details
ParameterStereo ModulatorJAX ONE XModulator Extended
Price$2.99 — better$12.99
Rating5.0 (3 ratings) — better4.0 (2 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings3 — better2
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better14.0
Further details — not scored
Size2 MB32 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedJens Guell

Customer experience

Stereo Modulator

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Stereo Modulator

No in-app purchases

None

JAX ONE XModulator Extended

No in-app purchases

Questions

Is Stereo Modulator free?
Stereo Modulator costs $2.99, 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, Stereo Modulator or JAX ONE XModulator Extended?
Stereo Modulator is rated higher. Stereo Modulator averages 5.0 out of 5 from 3 ratings, while JAX ONE XModulator Extended averages 4.0 from 2 ratings.
Do Stereo Modulator or JAX ONE XModulator Extended have ads?
Neither Stereo Modulator nor JAX ONE XModulator Extended shows ads.
Which is updated more often, Stereo Modulator or JAX ONE XModulator Extended?
Stereo Modulator ships an update every 3 months, and JAX ONE XModulator Extended every 4 days. Most recently, Stereo Modulator was updated on August 30, 2026 and JAX ONE XModulator Extended on September 15, 2026.

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