JAX Stereo Tool (AU) vs TB Compressor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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
TB Compressor
This professional audio plugin offers mastering-grade compression and dynamics processing for iOS devices. It features advanced controls like soft knee, parallel, upward/downward, and band-limited compression, with real-time visual feedback and an interactive interface.
- Mastering-grade compression
- Upward and downward compression
- External side-chain input
- Band-limited and spatially selective compression
- Real-time interactive display
- Audition function for compressor and side chain
- Integrated spectrum analyzer
Read full descriptionHide full description
Say Hi! to your new favourite iOS compressor AUv3 plugin! ToneBoosters Compressor is an AUv3 plugin for professional, mastering-grade compression and dynamics processing. This flexible plug-in has all the features you will ever need, such as: - Soft knee compression - Parallel compression - Upward and downward compression - External side-chain input (if supported by the host) - Band-limited compression - Spatially selective compression This compressor is suitable for every compression task and beyond: - Track compression - Bus and master bus compression - De-essing and de-harshing using the band-limited compression feature The user interface shows compression in action, with a real-time and interactive display of levels, gains and curves. Assisted sliders provide guidance to accurately adjust threshold, makeup and range parameters. Want to hear what signal elements are affected by compression? Hit the audition button and listen to everything that is changed by the compressor in isolation. The side-chain editor allows you to adjust the frequency response of the side chain, and has an integrated spectrum analyzer. You can select which channels the side chain listens to, including selection of mid or side channels. Obviously we have provided an audition button for the side chain as well! Imagine you could just compress the mid or side channel, and apply compression to a specific frequency range only. Dynamically make space for elements without having to compress the full mix; de-ess those sibilant vocals in the mid channel; soothe those harsh frequencies; the possibilities are endless. This is all possible with the compression zone feature. The ToneBoosters Compressor app captures the microphone (or external sound card) input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters Compressor will appear in the list of Audio Unit extensions for effect plug-ins. Key features: - The same professional sound as the acclaimed desktop version - Ultra-low harmonic distortion, even with very short attack and release times (THD less than -100dB at 1kHz, depending on the selected compression mode) - Full-fledged side-chain equalizer - Audition function for compressor and side chain - Integrated spectrum analyzer for output and side chain - Variable release curve shape and release time - Upward and downward compression - Signal-adaptive release - Auto make up - Range parameter to limit the amount of compression - Dry/wet (amount) control for parallel compression - Zero latency (for live use) or lookahead mode (for studio use) - Interactive user interface with assisted sliders, curve and gain visualization - Undo/redo, and A/B comparison - Color themes for the user interface - Max screen support in Garageband - Optimised for iPad and compatible with iPhone and iPod Touch What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.
Screenshots
Verdict
The clearest difference is rating: TB Compressor at 4.8 against JAX Stereo Tool (AU)'s 4.4. JAX Stereo Tool (AU)'s advantage is update cadence (every 11 days vs every 2 months) and price ($5.99 vs $8.99). On review sentiment, ratings volume, ads and in-app purchases 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
JAX Stereo Tool (AU) costs $5.99 and TB Compressor $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TB Compressor holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 27 and 24 respectively. Written reviews point the same way: 80% of JAX Stereo Tool (AU)'s written reviews are positive against 82% of TB Compressor's.
JAX Stereo Tool (AU) ships an update every 11 days, TB Compressor every 2 months. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.
| Parameter | JAX Stereo Tool (AU) | TB Compressor |
|---|---|---|
| Price | $5.99 — better | $8.99 |
| Rating | 4.4 (27 ratings) | 4.8 (24 ratings) — better |
| Positive reviews | 80.0% of reviews | 82.4% of reviews — better |
| Number of ratings | 27 — better | 24 |
| Update frequency | Every 11 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Guell | ToneBoosters |
Customer experience
JAX Stereo Tool (AU)
TB Compressor
In-app purchases
JAX Stereo Tool (AU)
No in-app purchases
TB Compressor
No in-app purchases
Questions
Is JAX Stereo Tool (AU) free?
Is TB Compressor free?
Which has better reviews, JAX Stereo Tool (AU) or TB Compressor?
Do JAX Stereo Tool (AU) or TB Compressor have ads?
Which is updated more often, JAX Stereo Tool (AU) or TB Compressor?
Other comparisons















