Stone Echo vs JAX DYNAMICS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stone Echo
This app creates a unique echo effect with adjustable frequency modulation, inspired by Mayan pyramid acoustics. It offers musical and experimental soundscapes, functioning as a standalone application or an AUV3 plugin.
- Frequency changing echo effect
- Phase modulated frequency
- Standalone app and AUV3 plugin
- Adjustable time, feedback, and level
- UFO mode for experimental sounds
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Echo effect Audio Unit V3 inspired by the mayan pyramids acoustic echo. I come up with a complex phase modulated frequency of the echo so you can change it’s frequency signature. It is kind of changing the material of the reflective surface and I called it “Stone F”. I have made the echo to sound more music friendly to me but there is button called “UFO” and if you press it the effect is more close to the mayan just shifting the frequency backwards (I liked that better). You can also control the feedback of the phase modulation. The effect can work as a stand alone app and as an audio unit AUV3 plug-in. Stone Echo is an effect that is heavy on the CPU Controls: - Time - time offset of the echo - Stone F - frequency response of the echo - Feedback - echo feedback - Level - the volume of the echo - UFO - heavy modulated echo
JAX DYNAMICS
This audio processing tool offers a single-band dynamics processor with versatile stereo operation modes, including independent and linked mid/side processing. It also features a parallel processing option for enhanced audio manipulation. The tool is distributed as an app extension for use within compatible music applications.
- Single-band dynamics processor
- Multiple stereo operation modes
- Independent and linked mid/side processing
- Parallel processing (mix) option
- AudioUnit (AUv3) format
- Universal app for macOS, iOS, iPadOS, visionOS
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The JAX DYNAMICS : Compressor is a single band dynamics audio processor and supports different stereo operation modi (like independent stereo, linked stereo, independent mid/side and linked mid/side processing) and has a parallel processing option (mix) too. The JAX Compressor is a dynamics processor in AudioUnit (AUv3) format. The audio unit itself (an app extension) is embedded into a small demo app. This is required for app distribution on Apple platforms. Installing the app will make the audio unit available for system wide usage with audio unit hosts (music apps), which support loading 3rd party app extensions in AUv3 format. There is a manual for our Dynamics Series Basic located at : https://audio.digitster.com/jax-dynamics-compressor A basic demonstration video for the dynamics series can be seen here : https://youtu.be/hOwM1t6jYes?si=gqlpp6oQRXtUuj8V This app 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 dedicated supporting host application to perform.
Screenshots
Verdict
The clearest difference is review sentiment: JAX DYNAMICS at 100% against Stone Echo's 50%. JAX DYNAMICS also leads on rating (3.7 vs 2.8) and update cadence (every 2 months vs every 38 months). Stone Echo's advantage is chart position (#191 vs unranked) and price ($2.99 vs $4.99). 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
Stone Echo costs $2.99 and JAX DYNAMICS $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
JAX DYNAMICS holds the better App Store score, 3.7 against 2.8. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 50% of Stone Echo's written reviews are positive against 100% of JAX DYNAMICS's.
Stone Echo ships an update every 38 months, JAX DYNAMICS every 2 months. The most recent releases landed on August 14, 2026 and September 22, 2026 respectively.
| Parameter | Stone Echo | JAX DYNAMICS |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 2.8 (4 ratings) | 3.7 (3 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 — better | 3 |
| Update frequency | Every 38 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #191 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 9 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | Jens Guell |
Customer experience
Stone Echo
JAX DYNAMICS
In-app purchases
Stone Echo
No in-app purchases
JAX DYNAMICS
No in-app purchases








