Comparison

Stone Echo vs GSDSP MagicFusion

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

GSDSP MagicFusion

This advanced audio effect plugin offers precise spectral fusion and multi-curve vocoding. It allows users to extract spectral characteristics from one audio source and apply them to another, enabling detailed transformations from subtle shading to extreme effects.

Highlights
  • Multi-curve spectral vocoding
  • Frequency-domain processing
  • Independent fusion amounts per frequency
  • Dynamic response control
  • Formant shifting
  • AUv3 audio effect plugin
Features
Read full description

The world’s first frequency-domain vocoder with multi-curve control and precision spectral fusion. Multi-Curve Spectral Vocoding MagicFusion is a multi-curve spectral vocoder workstation operating entirely in the frequency domain. Instead of relying on bandpass filters and envelope followers, it extracts the spectral characteristics of a modulator and applies them to a carrier, enabling precise, customizable vocoding across the entire spectrum. Apply independent fusion amounts per frequency or frequency range, then mix, modulate, and spread them to create anything from subtle vocal shading to extreme spectral transformations. Vocoder Signal Flow MagicFusion requires two audio inputs: the carrier (main input) and the modulator (sidechain). The plugin extracts the modulator’s spectral envelope and applies it to the carrier, creating a fused signal where both sources interact. This process provides clean, flexible control over the degree of spectral fusion and allows highly detailed shaping across the frequency spectrum. Dynamic Response & Formants Adjust the Smooth control to define how quickly the vocoder reacts, from fast, precise transitions to slower, more rounded movement. The Formant parameter shifts the spectral character of the modulator, while Detail adjusts the complexity of the filter response — from clean, intricate results to more organic, pumping behavior. MagicFusion is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products

Screenshots

Stone Echo2 screens
GSDSP MagicFusion3 screens

Verdict

The call

The clearest difference is review sentiment: GSDSP MagicFusion at 100% against Stone Echo's 50%. GSDSP MagicFusion also leads on rating (5.0 vs 2.8) and update cadence (every 6 weeks vs every 38 months). Stone Echo's advantage is price ($2.99 vs $29.99) and iOS requirement (10.0 vs 13.0). 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

CostPrice · In-app purchases · Ads · Monetization

Stone Echo costs $2.99 and GSDSP MagicFusion $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP MagicFusion holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 50% of Stone Echo's written reviews are positive against 100% of GSDSP MagicFusion's.

UpkeepUpdate frequency

Stone Echo ships an update every 38 months, GSDSP MagicFusion every 6 weeks. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Stone Echo versus GSDSP MagicFusion: the parameters behind the verdict, then further details
ParameterStone EchoGSDSP MagicFusion
Price$2.99 — better$29.99
Rating2.8 (4 ratings)5.0 (4 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings44
Update frequencyEvery 38 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better13.0
Further details — not scored
Size9 MB69 MB
Age rating4+4+
DeveloperAleksandar MlazevGustav Scholda

Customer experience

Stone Echo

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

GSDSP MagicFusion

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stone Echo

No in-app purchases

None

GSDSP MagicFusion

No in-app purchases

Questions

Is Stone Echo free?
Stone Echo costs $2.99, with no in-app purchases.
Is GSDSP MagicFusion free?
GSDSP MagicFusion costs $29.99, with no in-app purchases.
Which has better reviews, Stone Echo or GSDSP MagicFusion?
GSDSP MagicFusion is rated higher. Stone Echo averages 2.8 out of 5 from 4 ratings, while GSDSP MagicFusion averages 5.0 from 4 ratings.
Do Stone Echo or GSDSP MagicFusion have ads?
Neither Stone Echo nor GSDSP MagicFusion shows ads.
Which is updated more often, Stone Echo or GSDSP MagicFusion?
Stone Echo ships an update every 38 months, and GSDSP MagicFusion every 6 weeks. Most recently, Stone Echo was updated on November 11, 2026 and GSDSP MagicFusion on November 3, 2026.

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