# Guidosimplex vs Mental arithmetic quiz

The clearest difference is update cadence: Mental arithmetic quiz at every 8 days against Guidosimplex's every 28 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.

Guidosimplex ships an update every 28 months, Mental arithmetic quiz every 8 days. The most recent releases landed on March 3, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Guidosimplex | Mental arithmetic quiz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 8 days** |
| Size | 11 MB | 38 MB |
| Requires iOS | **11.0** | 12.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [常州信德泰克电器有限公司](https://appshunter.io/developer/1402533068) | [LiRen Sun](https://appshunter.io/developer/1649265349) |

## What reviewers say

### Guidosimplex

[App page](https://appshunter.io/ios/app/guidosimplex/id1549612487)

**In-app purchases:** none


### Mental arithmetic quiz

[App page](https://appshunter.io/ios/app/mental-arithmetic-quiz/id6443785734)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Guidosimplex free?

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

### Is Mental arithmetic quiz free?

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

### Do Guidosimplex or Mental arithmetic quiz have ads?

Neither Guidosimplex nor Mental arithmetic quiz shows ads.

### Which is updated more often, Guidosimplex or Mental arithmetic quiz?

Guidosimplex ships an update every 28 months, and Mental arithmetic quiz every 8 days. Most recently, Guidosimplex was updated on March 3, 2026 and Mental arithmetic quiz on May 17, 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.*