# おうちえいごナビ vs How Math Works

The clearest difference is in-app purchases: おうちえいごナビ at none against How Math Works's 1. おうちえいごナビ also leads on iOS requirement (13.0 vs 15.0). How Math Works's advantage is ads (none vs shown). On price, update cadence 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. おうちえいごナビ asks for nothing beyond the download.

おうちえいごナビ ships an update every 5 days, How Math Works every 6 days. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | おうちえいごナビ | How Math Works |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 6 days |
| Size | 62 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kaoru Nishimura](https://appshunter.io/developer/1815862694) | [Tsuyoshi Chujo](https://appshunter.io/developer/1481316741) |

## What reviewers say

### おうちえいごナビ

[App page](https://appshunter.io/ios/app/id6746684264)

**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 おうちえいごナビ free?

おうちえいごナビ 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 おうちえいごナビ or How Math Works have ads?

おうちえいごナビ shows ads; How Math Works does not.

### Which is updated more often, おうちえいごナビ or How Math Works?

おうちえいごナビ ships an update every 5 days, and How Math Works every 6 days. Most recently, おうちえいごナビ was updated on October 18, 2026 and How Math Works on October 9, 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.*