# ChordMapMidi vs JAX Stereo Tool (AU)

The clearest difference is rating: ChordMapMidi at 5.0 against JAX Stereo Tool (AU)'s 4.4. ChordMapMidi also leads on price ($3.99 vs $5.99). JAX Stereo Tool (AU)'s advantage is update cadence (every 11 days vs every 8 months) and review sentiment (80% vs 53%). On ads, in-app purchases and monetization model there is nothing between them.

ChordMapMidi costs $3.99 and JAX Stereo Tool (AU) $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ChordMapMidi 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 5, so its average is the more settled of the two. Written reviews complicate that: 53% of ChordMapMidi's written reviews are positive against 80% of JAX Stereo Tool (AU)'s, so the app with the better star average is not the one people write more warmly about.

ChordMapMidi ships an update every 8 months, JAX Stereo Tool (AU) every 11 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ChordMapMidi | JAX Stereo Tool (AU) |
| --- | --- | --- |
| Price | **$3.99** | $5.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/chordmapmidi/id533859936/reviews)** | [4.4 (27 ratings)](https://appshunter.io/ios/app/jax-stereo-tool-au/id1473390302/reviews) |
| Number of ratings | 5 | **27** |
| Positive reviews | 52.9% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 11 days** |
| Monetization | Paid | Paid |
| Size | 4 MB | 10 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Malcolm Mugglin](https://appshunter.io/developer/533859939) | [Jens Guell](https://appshunter.io/developer/1195004865) |

## What reviewers say

### ChordMapMidi

[App page](https://appshunter.io/ios/app/chordmapmidi/id533859936)

This app is a MIDI controller for exploring musical chords and progressions in major and minor keys. It sends note information to other synthesizer apps on your device, making it a portable tool for musicians and educators.

**Highlights:** Explore chords and progressions, Major and minor keys, MIDI controller functionality, Sends note information to synth apps, Portable music tool

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ChordMapMidi free?

ChordMapMidi costs $3.99, with no in-app purchases.

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

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

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

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

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

Neither ChordMapMidi nor JAX Stereo Tool (AU) shows ads.

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

ChordMapMidi ships an update every 8 months, and JAX Stereo Tool (AU) every 11 days. Most recently, ChordMapMidi was updated on October 9, 2026 and JAX Stereo Tool (AU) on October 12, 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.*