# こえで はくちず vs How Math Works

The clearest difference is in-app purchases: こえで はくちず at none against How Math Works's 1. How Math Works's advantage is update cadence (every 6 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. How Math Works sells 1 in-app purchase, starting at $3.99 per month. こえで はくちず asks for nothing beyond the download.

こえで はくちず ships an update every 3 months, How Math Works every 6 days. The most recent releases landed on August 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | こえで はくちず | How Math Works |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Size | 31 MB | 29 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Yasukawa](https://appshunter.io/developer/1815733536) | [Tsuyoshi Chujo](https://appshunter.io/developer/1481316741) |

## What reviewers say

### こえで はくちず

[App page](https://appshunter.io/ios/app/id6758234544)

**Features:** macOS Compatibility

**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 こえで はくちず free?

こえで はくちず 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 こえで はくちず or How Math Works have ads?

Neither こえで はくちず nor How Math Works shows ads.

### Which is updated more often, こえで はくちず or How Math Works?

こえで はくちず ships an update every 3 months, and How Math Works every 6 days. Most recently, こえで はくちず was updated on August 24, 2026 and How Math Works on September 23, 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.*