# おはなし日記 vs How Math Works

The clearest difference is in-app purchases: おはなし日記 at none against How Math Works's 1. おはなし日記 also leads on iOS requirement (13.0 vs 15.0). How Math Works's advantage is ads (none vs shown) and update cadence (every 6 days vs every 5 weeks). 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. おはなし日記 asks for nothing beyond the download.

おはなし日記 ships an update every 5 weeks, How Math Works every 6 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | おはなし日記 | How Math Works |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Size | 83 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fixis, LLC](https://appshunter.io/developer/1827219655) | [Tsuyoshi Chujo](https://appshunter.io/developer/1481316741) |

## What reviewers say

### おはなし日記

[App page](https://appshunter.io/ios/app/id6757658644)

**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 おはなし日記 free?

おはなし日記 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 おはなし日記 or How Math Works have ads?

おはなし日記 shows ads; How Math Works does not.

### Which is updated more often, おはなし日記 or How Math Works?

おはなし日記 ships an update every 5 weeks, and How Math Works every 6 days. Most recently, おはなし日記 was updated on October 25, 2026 and How Math Works on October 25, 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.*