# JAX Stereo Tool (AU) vs Composer Lab

The clearest difference is price: JAX Stereo Tool (AU) at $5.99 against Composer Lab's $17.99. JAX Stereo Tool (AU) also leads on ratings volume (27 vs 2) and iOS requirement (12.0 vs 18.2). Composer Lab's advantage is rating (5.0 vs 4.4) and review sentiment (100% vs 80%). On ads, in-app purchases, monetization model and device support there is nothing between them.

JAX Stereo Tool (AU) costs $5.99 and Composer Lab $17.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Composer Lab holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: JAX Stereo Tool (AU) has 27 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of JAX Stereo Tool (AU)'s written reviews are positive against 100% of Composer Lab's.

JAX Stereo Tool (AU) ships an update every 11 days, Composer Lab every 3 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | JAX Stereo Tool (AU) | Composer Lab |
| --- | --- | --- |
| Price | **$5.99** | $17.99 |
| Rating | [4.4 (27 ratings)](https://appshunter.io/ios/app/jax-stereo-tool-au/id1473390302/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/composer-lab/id6744673208/reviews)** |
| Number of ratings | **27** | 2 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 3 days** |
| Monetization | Paid | Paid |
| Size | 10 MB | 49 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jens Guell](https://appshunter.io/developer/1195004865) | [笑一 杨](https://appshunter.io/developer/1808689646) |

## What reviewers say

### JAX Stereo Tool (AU)

[App page](https://appshunter.io/ios/app/jax-stereo-tool-au/id1473390302)

This audio processing tool allows users to visually manipulate the stereo image of digital audio. It functions as a mastering effect, enabling real-time adjustment of stereo width and the recovery of mono compatibility. The app includes a correlograph for visual feedback and optimization.

**Highlights:** Visual stereo image manipulation, Real-time stereo width adjustment, Mono compatibility recovery, Integrated correlograph for visual feedback, Audio Unit (AUv3) plugin format, System-wide availability

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Composer Lab

[App page](https://appshunter.io/ios/app/composer-lab/id6744673208)

Explore harmonic structures, scales, and microtonal tuning systems. This app offers tools for organizing pitch material, crafting custom tunings, and managing rhythmic units for songwriting and composition.

**Highlights:** Harmonic structure exploration, Custom tuning system creation, Rhythmic unit management, Microtonal scale playback, DAW file export (.scl, .tun), Pitch set theory principles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JAX Stereo Tool (AU) free?

JAX Stereo Tool (AU) costs $5.99, with no in-app purchases.

### Is Composer Lab free?

Composer Lab costs $17.99, with no in-app purchases.

### Which has better reviews, JAX Stereo Tool (AU) or Composer Lab?

Composer Lab is rated higher. JAX Stereo Tool (AU) averages 4.4 out of 5 from 27 ratings, while Composer Lab averages 5.0 from 2 ratings.

### Do JAX Stereo Tool (AU) or Composer Lab have ads?

Neither JAX Stereo Tool (AU) nor Composer Lab shows ads.

### Which is updated more often, JAX Stereo Tool (AU) or Composer Lab?

JAX Stereo Tool (AU) ships an update every 11 days, and Composer Lab every 3 days. Most recently, JAX Stereo Tool (AU) was updated on November 3, 2026 and Composer Lab on November 5, 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.*