# Mental Calculation vs LIOU

The clearest difference is update cadence: LIOU at fortnightly against Mental Calculation's every 25 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mental Calculation ships an update every 25 months, LIOU fortnightly. The most recent releases landed on September 20, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Mental Calculation | LIOU |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 7 MB | 82 MB |
| Requires iOS | **11.4** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Frederic Bronner](https://appshunter.io/developer/291929818) | [SYNAKENE](https://appshunter.io/developer/1481479346) |

## What reviewers say

### Mental Calculation

[App page](https://appshunter.io/ios/app/mental-calculation/id765124023)

This game helps you practice mental arithmetic skills throughout the year. It offers a fun and engaging way to improve your math abilities.

**Highlights:** Mental arithmetic practice, Year-round learning, Engaging gameplay, Improves math skills

**Features:** macOS Compatibility

**In-app purchases:** none


### LIOU

[App page](https://appshunter.io/ios/app/liou/id6444768728)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mental Calculation free?

Mental Calculation is free to download, with no in-app purchases.

### Is LIOU free?

LIOU is free to download, with no in-app purchases.

### Do Mental Calculation or LIOU have ads?

Neither Mental Calculation nor LIOU shows ads.

### Which is updated more often, Mental Calculation or LIOU?

Mental Calculation ships an update every 25 months, and LIOU fortnightly. Most recently, Mental Calculation was updated on September 20, 2026 and LIOU 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.*