# Stone Echo vs PolyrhythmLab

The clearest difference is review sentiment: Stone Echo at 50% against PolyrhythmLab's 0%. Stone Echo also leads on rating (2.8 vs 1.0) and price ($2.99 vs $4.99). PolyrhythmLab's advantage is update cadence (fortnightly vs every 38 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

Stone Echo costs $2.99 and PolyrhythmLab $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stone Echo holds the better App Store score, 2.8 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 50% of Stone Echo's written reviews are positive against 0% of PolyrhythmLab's.

Stone Echo ships an update every 38 months, PolyrhythmLab fortnightly. Both last shipped on October 7, 2026.

## The numbers

| Metric | Stone Echo | PolyrhythmLab |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | **[2.8 (4 ratings)](https://appshunter.io/ios/app/stone-echo/id1354390681/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/polyrhythmlab/id6806714489/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 9 MB | 401 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Martin Adler](https://appshunter.io/developer/1896354791) |

## What reviewers say

### Stone Echo

[App page](https://appshunter.io/ios/app/stone-echo/id1354390681)

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:** Vision Pro support

**In-app purchases:** none


### PolyrhythmLab

[App page](https://appshunter.io/ios/app/polyrhythmlab/id6806714489)

Create complex, evolving musical rhythms and dynamic visual performances. This app offers a unique polyrhythmic engine for sound layers and a live visual mixer with customizable effects and camera controls. Export audio, MIDI, or video of your creations.

**Highlights:** True polyrhythm engine with independent step/pulse counts per layer, AUv3 plugin support for DAWs like GarageBand and Logic, Live MIDI output for driving external synths, Integrated VJ mixer with audio-reactive visuals and effects, Song mode for arranging patterns into full tracks, Save and reload groovebox patterns and VJ setups as presets, Export audio, MIDI, and video recordings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stone Echo free?

Stone Echo costs $2.99, with no in-app purchases.

### Is PolyrhythmLab free?

PolyrhythmLab costs $4.99, with no in-app purchases.

### Which has better reviews, Stone Echo or PolyrhythmLab?

Stone Echo is rated higher. Stone Echo averages 2.8 out of 5 from 4 ratings, while PolyrhythmLab averages 1.0 from 1 ratings.

### Do Stone Echo or PolyrhythmLab have ads?

Neither Stone Echo nor PolyrhythmLab shows ads.

### Which is updated more often, Stone Echo or PolyrhythmLab?

Stone Echo ships an update every 38 months, and PolyrhythmLab fortnightly. Most recently, Stone Echo was updated on October 7, 2026 and PolyrhythmLab on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*