# ScaleGen vs Stone Echo

The clearest difference is rating: ScaleGen at 4.7 against Stone Echo's 2.8. ScaleGen also leads on review sentiment (71% vs 50%) and ratings volume (12 vs 4). Stone Echo's advantage is device support (3 vs 1) and price ($2.99 vs $3.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

ScaleGen costs $3.99 and Stone Echo $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ScaleGen holds the better App Store score, 4.7 against 2.8. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews point the same way: 71% of ScaleGen's written reviews are positive against 50% of Stone Echo's.

ScaleGen ships an update every 29 months, Stone Echo every 38 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ScaleGen | Stone Echo |
| --- | --- | --- |
| Price | $3.99 | **$2.99** |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/scalegen/id908056629/reviews)** | [2.8 (4 ratings)](https://appshunter.io/ios/app/stone-echo/id1354390681/reviews) |
| Number of ratings | **12** | 4 |
| Positive reviews | **70.6% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 29 months** | Every 38 months |
| Monetization | Paid | Paid |
| Size | 14 MB | 9 MB |
| Requires iOS | 10.0 | 10.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gestrument AB](https://appshunter.io/developer/576235485) | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) |

## What reviewers say

### ScaleGen

[App page](https://appshunter.io/ios/app/scalegen/id908056629)

Generate and edit musical scales with intricate detail. Explore traditional and experimental tunings, audition your creations, and export them as MIDI files or to other applications. Ideal for composers and students seeking to expand their musical horizons.

**Highlights:** Generate and manipulate musical scales, Detailed scale definition and editing, Audition scales within the app, Export as MIDI or to Gestrument, Predefined scales from various traditions, Explore microtonal and experimental tunings

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ScaleGen free?

ScaleGen costs $3.99, with no in-app purchases.

### Is Stone Echo free?

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

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

ScaleGen is rated higher. ScaleGen averages 4.7 out of 5 from 12 ratings, while Stone Echo averages 2.8 from 4 ratings.

### Do ScaleGen or Stone Echo have ads?

Neither ScaleGen nor Stone Echo shows ads.

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

ScaleGen ships an update every 29 months, and Stone Echo every 38 months. Most recently, ScaleGen was updated on October 13, 2026 and Stone Echo on October 7, 2026.

---

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