# Mental Math Fun vs 19×19

The clearest difference is price: Mental Math Fun at Free against 19×19's $2.99. Mental Math Fun also leads on update cadence (every 2 days vs every 9 days). 19×19's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Mental Math Fun is free to download; 19×19 costs $2.99 up front. Mental Math Fun sells 2 in-app purchases, starting at $2.99 per year. 19×19 asks for nothing beyond the download.

Mental Math Fun ships an update every 2 days, 19×19 every 9 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Mental Math Fun | 19×19 |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 days |
| Size | 5 MB | 7 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [光 韩](https://appshunter.io/developer/6772845629) | [JINGZHE JIANG](https://appshunter.io/developer/1888097689) |

## What reviewers say

### Mental Math Fun

[App page](https://appshunter.io/ios/app/mental-math-fun/id6772945811)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Zone Subscription | $2.99 | per year |
| Unlock All Features | $4.99 | one-time |


### 19×19

[App page](https://appshunter.io/ios/app/1919/id6815097266)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Math Fun free?

Mental Math Fun is free to download, with in-app purchases available.

### Is 19×19 free?

19×19 costs $2.99, with no in-app purchases.

### Do Mental Math Fun or 19×19 have ads?

Neither Mental Math Fun nor 19×19 shows ads.

### Which is updated more often, Mental Math Fun or 19×19?

Mental Math Fun ships an update every 2 days, and 19×19 every 9 days. Most recently, Mental Math Fun was updated on October 25, 2026 and 19×19 on October 31, 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.*