# Stone Echo — Frequency changing echo effect

> Frequency-changing echo effect audio unit for music production. (iPhone/iPad app by Aleksandar Mlazev.)

- Source: https://appshunter.io/ios/app/stone-echo/id1354390681 (this page in markdown: same URL + `.md`)
- Developer: [Aleksandar Mlazev](https://appshunter.io/developer/1093798140)
- Category: Music, Utilities
- Price: $2.99
- Rating: 2.80/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 9 MB
- Languages: American English
- Released: 2018-03-02
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/stone-echo/id1354390681/reviews.md

## What is Stone Echo?

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

## Key features

- Frequency changing echo effect
- Phase modulated frequency
- Standalone app and AUV3 plugin
- Adjustable time, feedback, and level
- UFO mode for experimental sounds

## Chart rankings

- #191 in Top Paid · Music (US App Store)

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/stone-echo/id1354390681/reviews.md

### 5/5 — Kadar Woody

*2024-05-24*

Is this modeled on Tera Echo by Boss

### 1/5 — Not compatible with AirPods!

*2018-11-30*

Just bought it for $ 2.99 and found out  it’s not compatible with AirPods

## Frequently asked questions about Stone Echo

### What is Stone Echo?

Stone Echo is an audio effect application that creates a unique, frequency-changing echo. It's inspired by the acoustics of Mayan pyramids and can be used as a standalone app or an AUV3 plugin.

### How much does Stone Echo cost?

Stone Echo is a paid application, priced at $2.99. There are no in-app purchases or subscriptions available for this app.

### Does Stone Echo have ads?

No, Stone Echo does not contain advertisements. It is a paid application that offers an ad-free experience.

### What devices does Stone Echo support?

Stone Echo is compatible with iPhone, iPad, and iPod devices. It is designed for iOS and iPadOS.

### What is the age rating for Stone Echo?

Stone Echo has an age rating of 4+, making it suitable for a wide range of users.

### How often is Stone Echo updated?

The latest version of Stone Echo is 1.3, last updated on July 22, 2025. The app was initially released on March 2, 2018.

### What are the main controls in Stone Echo?

Key controls include Time for echo delay, Stone F for frequency response, Feedback for echo sustain, Level for volume, and a UFO button for a more experimental, heavily modulated echo.

### Is Stone Echo CPU intensive?

Yes, the description states that Stone Echo is an effect that is heavy on the CPU. Users should be aware of this when integrating it into their projects.

## Version history (last 4 releases)

### 1.3 — 2025-07-22

Updated with new SDK

### 1.2 — 2021-10-23

Updated to the newest Swift version
Fix for the newest iPad models

### 1.1 — 2018-09-08

This app has been updated by Apple to display the Apple Watch app icon.

fix for iOS 11.4 sliders freeze problem in stand alone mode

### 1.0 — 2018-03-02

No release notes.

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## More apps by Aleksandar Mlazev

- [Fine Chromatic Tuner](https://appshunter.io/ios/app/fine-chromatic-tuner/id1093798141)
- [Frequency Sound Generator](https://appshunter.io/ios/app/frequency-sound-generator/id1098669497)
- [Fine Bass Tuner](https://appshunter.io/ios/app/fine-bass-tuner/id1099100372)
- [Sonic Synth : FM synthesizer](https://appshunter.io/ios/app/sonic-synth-fm-synthesizer/id1104940736)
- [Drum Beats Metronome](https://appshunter.io/ios/app/drum-beats-metronome/id1115616093)
- [Guitar Tabs X - tabs editor](https://appshunter.io/ios/app/guitar-tabs-x-tabs-editor/id1138809362)

All apps by Aleksandar Mlazev: https://appshunter.io/developer/1093798140

## Related topics

[bsky echo](https://appshunter.io/ios/topics/bsky-echo)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*