Comparison

Stone Echo vs SGA Phoenix

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

SGA Phoenix

This app provides authentic analog preamp sounds for music production. It simulates various triode and JFET circuits in real-time to add warmth, color, and depth to mixes and masters. EQ can be adjusted before or after the preamp, with auto gain and oversampling for professional results.

Highlights
  • Authentic analog sound simulation
  • Triode and JFET preamp models
  • Adjustable EQ placement
  • Auto Gain control
  • Automatic oversampling
  • Wet/Dry mixing
Read full description

SGA Phoenix brings the authentic sound of five analog preamps to your AUv3 compatible host. Each preamp derives its unique sonic character from a different active element (12AX7, 12AT7, and 12AU7 triodes, and J201 and 2N5457 JFET transistors). To achieve the most authentic analog sound, each preamp circuit is simulated in real time using Shattered Glass Audio’s state-of-the-art circuit simulator. Use Phoenix to add color, warmth, dirt, depth, and vibe to your mixes and masters or as a saturation compressor. Key features: - Authentic analog sound through real-time high-performance circuit simulation. - Three preamps featuring triodes 12AX7, 12AT7, and 12AU7. - Two preamps featuring JFET transistors J201, 2N5457. - Multiple types of EQs. - EQ can be taken out of the signal path or placed either before or after the preamp. - Auto Gain - Automatic 4x oversampling to control aliasing - Wet/Dry mixing. Phoenix is primarily an AUv3 effect. To use Phoenix as a plug-in, you will need an AUv3 compatible host such as Garageband, AUM, etc. Phoenix application is there to provide a user manual and a chance to use Phoenix with the microphone input. You can try Phoenix on a macOS or a Windows based, machine by downloading the demo version of the plug-in (VST3, AUv2, AAX) from our website https://www.shatteredglassaudio.com and running it in a DAW of your choice. Sonically speaking there are no differences between the iOS and macOS/Windows versions of Phoenix.

Screenshots

Stone Echo2 screens
SGA Phoenix2 screens

Verdict

The call

The clearest difference is price: Stone Echo at $2.99 against SGA Phoenix's $24.99. Stone Echo also leads on iOS requirement (10.0 vs 15.8). SGA Phoenix's advantage is rating (5.0 vs 2.8) and update cadence (every 14 months vs every 38 months). 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 SGA Phoenix $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SGA Phoenix holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 4 and 4 respectively.

UpkeepUpdate frequency

Stone Echo ships an update every 38 months, SGA Phoenix every 14 months. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

Scorecard4 real differences · 6 level
Stone Echo versus SGA Phoenix: the parameters behind the verdict, then further details
ParameterStone EchoSGA Phoenix
Price$2.99 — better$24.99
Rating2.8 (4 ratings)5.0 (4 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings44
Update frequencyEvery 38 monthsEvery 14 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.8
Further details — not scored
Size9 MB5 MB
Age rating4+4+
DeveloperAleksandar MlazevShattered Glass Audio

Customer experience

Stone Echo

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

SGA Phoenix

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stone Echo

No in-app purchases

None

SGA Phoenix

No in-app purchases

Questions

Is Stone Echo free?
Stone Echo costs $2.99, with no in-app purchases.
Is SGA Phoenix free?
SGA Phoenix costs $24.99, with no in-app purchases.
Which has better reviews, Stone Echo or SGA Phoenix?
SGA Phoenix is rated higher. Stone Echo averages 2.8 out of 5 from 4 ratings, while SGA Phoenix averages 5.0 from 4 ratings.
Do Stone Echo or SGA Phoenix have ads?
Neither Stone Echo nor SGA Phoenix shows ads.
Which is updated more often, Stone Echo or SGA Phoenix?
Stone Echo ships an update every 38 months, and SGA Phoenix every 14 months. Most recently, Stone Echo was updated on October 7, 2026 and SGA Phoenix on October 11, 2026.

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