Stone Echo vs ThreeTuring
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
ThreeTuring
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Construct evolving sequences. The creative experience of using a constrained hardware system rather than the lazy freedom of just being able to “add another module”. ThreeTuring lays out everything in front of you without the need to keep going back to the manual. No menu diving, no alternative pages and easy to pick up if you haven’t used it for a few weeks or months. Having fun making music. ThreeTuring consists of a dual oscillator monosynth, a clock module for generating trigger patterns alongside a collection of generative modules encompassing a range of modular generative techniques including a turing machine, random generators, LFOs, envelope generators, a quantiser, a note accent and a set of effects modules. Pretty much every control can be modulated via the nine slot modmatrix, including the modulation settings themselves.
Screenshots
Verdict
The clearest difference is price: Stone Echo at $2.99 against ThreeTuring's $9.99. Stone Echo also leads on iOS requirement (10.0 vs 15.0). ThreeTuring's advantage is update cadence (every 4 days vs every 38 months). On ads, in-app purchases and device support 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 ThreeTuring $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Stone Echo ships an update every 38 months, ThreeTuring every 4 days. The most recent releases landed on September 20, 2026 and September 16, 2026 respectively.
| Parameter | Stone Echo | ThreeTuring |
|---|---|---|
| Price | $2.99 — better | $9.99 |
| Rating | 2.8 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 38 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | Pagefall limited |
In-app purchases
Stone Echo
No in-app purchases
ThreeTuring
No in-app purchases









