Comparison

JAX Stereo Tool (AU) vs Piano Visualizer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

JAX Stereo Tool (AU)

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
Read full description

JAX Stereo Tool is a visual Audio Unit plugin for manipulating the stereo image of digital audio. The distribution app comes with an embedded plug-in (Audio Unit) that is available system-wide when you install the app. You should be able to use it with most supporting host applications. Audio Units are Apple's recommended method for providing shared audio effects for applications and audio editors. You can load the plugin into any host application that supports at least stereophonic audio effect plug-ins (in Audio Unit format - AUv3) with its own user interface. JAX Stereo Tool has its main use as a mastering effect, that allows you to modify the stereo image of your audio by narrowing or widening it in a controlled manner. That is, the stereo output can be continuously adjusted in the basic function of pure mono to very wide stereo. This happens in real time and you can observe the result with the integrated correlograph, controlling and optimizing the audio thanks to this helpful additional visual information. One of the special functions of JAX Stereo Toolis to recover lost mono-compatibility. This technique is conceptually quite simple and effective but somewhat difficult to understand. Please read the manual for further details. The manual is shipped with the app or available on the product website at https://audio.digitster.com

About

Piano Visualizer

Experience piano music like never before with detailed 3D animations of a grand piano's inner workings. Watch any music or MIDI file come to life with real-time, mechanically accurate visuals, including augmented reality and tactile feedback options.

Highlights
  • Mechanically accurate 3D grand piano model
  • Versatile audio and MIDI input
  • Live, real-time animation
  • Transparent view mode
  • Augmented Reality mode
  • Tactile feedback (iOS)
Read full description

Dive into the elegance of piano music paired with groundbreaking technology. Piano Visualizer transforms how you experience music, offering a stunning 3D glimpse into the inner workings of a grand piano through detailed, mechanically accurate animations. Discover the Magic of Piano Visualizer: Imagine watching a piano play itself with exact precision - from the striking of each key to the movement of hammers and dampers. With Piano Visualizer, unleash the true beauty of piano performances right from your Mac, iPhone, iPad, or Apple Vision Pro. Key Features You’ll Love: - Mechanically Accurate 3D Model: Explore all intricacies of a grand piano in high-definition 3D. - Versatile Audio Input: Feed any music or midi file into the app and watch it come to life. - Live Animation: Enjoy real-time animations of a grand piano. - Transparent View Mode: Peek into the piano’s inner mechanisms with an innovative see-through display option. - Augmented Reality Mode: (Available on mobile devices) Step into new dimensions and view performances right in your living space. - Feel Every Note: (Available on iOS devices) Experience every keystroke with tactile feedback through CoreHaptics. Privacy and Convenience Hand in Hand: Your performances are personal. That’s why all processing in Piano Visualizer is conducted on your device, ensuring that your data remains private and secure with no internet connection required.

Screenshots

JAX Stereo Tool (AU)4 screens
Piano Visualizer4 screens

Verdict

The call

The clearest difference is rating: JAX Stereo Tool (AU) at 4.4 against Piano Visualizer's 1.0. JAX Stereo Tool (AU) also leads on update cadence (every 11 days vs every 3 months) and price ($5.99 vs $9.99). On ads, in-app purchases, monetization model and device support 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

JAX Stereo Tool (AU) costs $5.99 and Piano Visualizer $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

JAX Stereo Tool (AU) holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: JAX Stereo Tool (AU) has 27 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

JAX Stereo Tool (AU) ships an update every 11 days, Piano Visualizer every 3 months. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

Scorecard5 real differences · 5 level
JAX Stereo Tool (AU) versus Piano Visualizer: the parameters behind the verdict, then further details
ParameterJAX Stereo Tool (AU)Piano Visualizer
Price$5.99 — better$9.99
Rating4.4 (27 ratings) — better1.0 (1 ratings)
Positive reviews80.0% of reviews—
Number of ratings27 — better1
Update frequencyEvery 11 days — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac, Vision Pro — better
Requires iOS12.0 — better26.0
Further details — not scored
Size10 MB247 MB
Age rating4+4+
DeveloperJens GuellWeida Fan

Customer experience

JAX Stereo Tool (AU)

All ratings27 ratings
Positive85.2%
Neutral0.0%
Negative14.8%
Written reviews10 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Piano Visualizer

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

JAX Stereo Tool (AU)

No in-app purchases

None

Piano Visualizer

No in-app purchases

Questions

Is JAX Stereo Tool (AU) free?
JAX Stereo Tool (AU) costs $5.99, with no in-app purchases.
Is Piano Visualizer free?
Piano Visualizer costs $9.99, with no in-app purchases.
Which has better reviews, JAX Stereo Tool (AU) or Piano Visualizer?
JAX Stereo Tool (AU) is rated higher. JAX Stereo Tool (AU) averages 4.4 out of 5 from 27 ratings, while Piano Visualizer averages 1.0 from 1 ratings.
Do JAX Stereo Tool (AU) or Piano Visualizer have ads?
Neither JAX Stereo Tool (AU) nor Piano Visualizer shows ads.
Which is updated more often, JAX Stereo Tool (AU) or Piano Visualizer?
JAX Stereo Tool (AU) ships an update every 11 days, and Piano Visualizer every 3 months. Most recently, JAX Stereo Tool (AU) was updated on October 12, 2026 and Piano Visualizer on October 15, 2026.

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