Stone Echo vs HearSonic
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
HearSonic
Transform your listening experience with this audio processor. It enhances live audio for outdoor headphone use, offering spectral feedback and tonal shifts. Save custom soundscapes and record past moments with history recording.
- Band-selective spectral feedback
- Sound Field sphere shaping
- History Recording
- On-device motion sensor integration
- MIDI In for parameter control
- AUv3 plugin support
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HearSonic is a reactive granular processor with band-selective spectral feedback for live audio, built primarily for outdoor headphone listening. It also works as an AUv3 effect on instruments and recordings in a host. It combines several processing chains to produce rich overlays and warm or dark tonal shifts in received audio which transforms user's listening environment. - shape the sound with Sound Field sphere, Dark & Bright amounts, and many parameters - parameters sets can be saved in a session - standalone works with default microphone input only (you need headphones, otherwise the processing will not start) - has 'History Recording' with configurable length which runs continuously and allows capturing past moments - On device motion sensors can be used for sound field movement - MIDI In for chosen parameter - works as AU plugin in audio hosts with adjusted input signal processing
Screenshots
Verdict
The clearest difference is rating: HearSonic at 5.0 against Stone Echo's 2.8. HearSonic also leads on update cadence (every 3 days vs every 38 months). Stone Echo's advantage is price ($2.99 vs $7.99) and iOS requirement (10.0 vs 15.0). 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
Stone Echo costs $2.99 and HearSonic $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HearSonic holds the better App Store score, 5.0 against 2.8. Both are backed by a comparable volume of ratings — 4 and 2 respectively.
Stone Echo ships an update every 38 months, HearSonic every 3 days. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.
| Parameter | Stone Echo | HearSonic |
|---|---|---|
| Price | $2.99 — better | $7.99 |
| Rating | 2.8 (4 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | 2 |
| Update frequency | Every 38 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | r6 appz |
Customer experience
Stone Echo
HearSonic
In-app purchases
Stone Echo
No in-app purchases
HearSonic
No in-app purchases





