Comparison

Stone Echo vs JAX Convolutor PRO (AU)

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

Head to head
About

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.

Highlights
  • Frequency changing echo effect
  • Phase modulated frequency
  • Standalone app and AUV3 plugin
  • Adjustable time, feedback, and level
  • UFO mode for experimental sounds
Features
Read full description

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

About

JAX Convolutor PRO (AU)

This app uses complex signal processing to create realistic reverberation effects by analyzing real-world environments. It allows users to apply these effects to audio material, making it sound as if it were played in a specific location. Advanced adjustments can refine the results for professional audio production.

Highlights
  • Realistic reverberation effects
  • Impulse response analysis
  • Audio material manipulation
  • FFT algorithm processing
  • Customizable adjustments
Features
Read full description

Remarks: This is an Audio Unit, but you have to open the distribution app ones at least to install the included IR file library. Convolution is a highly complex signal processing approach, that needs some certain computation power. The recorded impulse response of a real world environment is used to render a reverberation effect onto any audio material, so that it sounds like the source was played in that original room or at that location. Some further adjustments and manipulations can be applied to refine these results. Now this all may sound somewhat naive at first listen but the entire calculation is extremely complex math, so that the very first processors and computers were able to perform this in realtime rather around the end of the last millennium. Basically, the impulse responses and the audio stream are completely analyzed with FFT algorithms and then the entire analysis data will be cross-modulated into the realtime audio stream by performing a repeated highly performance intensive re-synthesis and accumulation processing for each analysis block of the impulse response. Therefore it is a crucial performance factor that you use JAX Convolutor with larger processing buffer sizes (1024) samples. Shorter buffers may raise the CPU hit exorbitantly for several reasons. The manual is embedded into the main app.

Screenshots

Stone Echo2 screens
JAX Convolutor PRO (AU)4 screens

Verdict

The call

The clearest difference is review sentiment: JAX Convolutor PRO (AU) at 100% against Stone Echo's 50%. JAX Convolutor PRO (AU) also leads on rating (4.6 vs 2.8). Stone Echo's advantage is price ($2.99 vs $9.99) and iOS requirement (10.0 vs 12.0). On ratings volume, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Stone Echo costs $2.99 and JAX Convolutor PRO (AU) $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

JAX Convolutor PRO (AU) holds the better App Store score, 4.6 against 2.8. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews point the same way: 50% of Stone Echo's written reviews are positive against 100% of JAX Convolutor PRO (AU)'s.

UpkeepUpdate frequency

Stone Echo ships an update every 38 months, JAX Convolutor PRO (AU) every 25 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Stone Echo versus JAX Convolutor PRO (AU): the parameters behind the verdict, then further details
ParameterStone EchoJAX Convolutor PRO (AU)
Price$2.99 — better$9.99
Rating2.8 (4 ratings)4.6 (5 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings45 — better
Update frequencyEvery 38 monthsEvery 25 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better12.0
Further details — not scored
Size9 MB139 MB
Age rating4+4+
DeveloperAleksandar MlazevJens Guell

Customer experience

Stone Echo

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

JAX Convolutor PRO (AU)

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stone Echo

No in-app purchases

None

JAX Convolutor PRO (AU)

No in-app purchases

Questions

Is Stone Echo free?
Stone Echo costs $2.99, with no in-app purchases.
Is JAX Convolutor PRO (AU) free?
JAX Convolutor PRO (AU) costs $9.99, with no in-app purchases.
Which has better reviews, Stone Echo or JAX Convolutor PRO (AU)?
JAX Convolutor PRO (AU) is rated higher. Stone Echo averages 2.8 out of 5 from 4 ratings, while JAX Convolutor PRO (AU) averages 4.6 from 5 ratings.
Do Stone Echo or JAX Convolutor PRO (AU) have ads?
Neither Stone Echo nor JAX Convolutor PRO (AU) shows ads.
Which is updated more often, Stone Echo or JAX Convolutor PRO (AU)?
Stone Echo ships an update every 38 months, and JAX Convolutor PRO (AU) every 25 months. Most recently, Stone Echo was updated on November 2, 2026 and JAX Convolutor PRO (AU) on November 3, 2026.

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