# 計算アタック vs How Math Works

The clearest difference is in-app purchases: 計算アタック at none against How Math Works's 1. 計算アタック also leads on iOS requirement (12.0 vs 15.0). How Math Works's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. How Math Works sells 1 in-app purchase, starting at $3.99 per month. 計算アタック asks for nothing beyond the download.

## The numbers

| Metric | 計算アタック | How Math Works |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 6 days |
| Size | 31 MB | 29 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wataru Naotsuka](https://appshunter.io/developer/1821566933) | [Tsuyoshi Chujo](https://appshunter.io/developer/1481316741) |

## What reviewers say

### 計算アタック

[App page](https://appshunter.io/ios/app/id6749502322)

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

**In-app purchases:** none


### How Math Works

[App page](https://appshunter.io/ios/app/how-math-works/id6787864882)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan (Monthly) | $3.99 | per month |


## Frequently asked questions

### Is 計算アタック free?

計算アタック is free to download, with no in-app purchases.

### Is How Math Works free?

How Math Works is free to download, with in-app purchases available.

### Do 計算アタック or How Math Works have ads?

計算アタック shows ads; How Math Works does not.

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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.*