# 聲波密碼戰 vs MATHero 數學資通救地球

The clearest difference is device support: 聲波密碼戰 at 2 against MATHero 數學資通救地球's —. 聲波密碼戰 also leads on iOS requirement (13.4 vs 16.1). On price and in-app purchases 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 | 聲波密碼戰 | MATHero 數學資通救地球 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/id1614045705/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 3 days | — |
| Size | 91 MB | 396 MB |
| Requires iOS | **13.4** | 16.1 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 9+ |
| Developer | [Chia Feng Lee](https://appshunter.io/developer/1465685382) | [The Education University of Hong Kong](https://appshunter.io/developer/1130838504) |

## What reviewers say

### 聲波密碼戰

[App page](https://appshunter.io/ios/app/id1614045705)

**Features:** macOS Compatibility

**In-app purchases:** none


### MATHero 數學資通救地球

[App page](https://appshunter.io/ios/app/mathero/id6443892990)

**In-app purchases:** none


## Frequently asked questions

### Is 聲波密碼戰 free?

聲波密碼戰 is free to download, with no in-app purchases.

### Is MATHero 數學資通救地球 free?

MATHero 數學資通救地球 is free to download, with no in-app purchases.

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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.*