# こともん vs How Math Works

The clearest difference is update cadence: How Math Works at every 6 days against こともん's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. こともん sells 1 one-off in-app purchase and How Math Works sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

こともん ships an update every 3 weeks, How Math Works every 6 days. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | こともん | How Math Works |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Size | 42 MB | 29 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [REINA KIMURA](https://appshunter.io/developer/1883302663) | [Tsuyoshi Chujo](https://appshunter.io/developer/1481316741) |

## What reviewers say

### こともん

[App page](https://appshunter.io/ios/app/id6760374286)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| こともん Plus | $5.99 | one-time |


### 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 こともん free?

こともん is free to download, with in-app purchases available.

### Is How Math Works free?

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

### Do こともん or How Math Works have ads?

Neither こともん nor How Math Works shows ads.

### Which is updated more often, こともん or How Math Works?

こともん ships an update every 3 weeks, and How Math Works every 6 days. Most recently, こともん was updated on September 9, 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.*