# M.ETRO vs Moon Echo

The clearest difference is iOS requirement: M.ETRO at 9.0 against Moon Echo's 12.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | M.ETRO | Moon Echo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (20 ratings)](https://appshunter.io/ios/app/moon-echo/id6503342104/reviews)** |
| Number of ratings | — | **20** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Monetization | — | Free |
| Size | 17 MB | 21 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Paolo Giorgi](https://appshunter.io/developer/1481916003) | [AudioThing Ltd.](https://appshunter.io/developer/1659941236) |

## What reviewers say

### M.ETRO

[App page](https://appshunter.io/ios/app/metro/id1543955749)

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

**In-app purchases:** none


### Moon Echo

[App page](https://appshunter.io/ios/app/moon-echo/id6503342104)

This free music app simulates echoes using the moon as a radio wave reflector. It creates unique, lively, and lo-fi effects modulated by celestial movements, offering a playful tool for both musicians and space enthusiasts.

**Highlights:** Moon-based echo simulation, Lo-fi musical effect, Celestial modulation, Space education tool, AUv3 and Standalone support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is M.ETRO free?

M.ETRO is free to download, with no in-app purchases.

### Is Moon Echo free?

Moon Echo is free to download, with no in-app purchases.

### Do M.ETRO or Moon Echo have ads?

Neither M.ETRO nor Moon Echo shows ads.

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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.*