# Calcul Mental Challenge vs Grammatis

The clearest difference is update cadence: Calcul Mental Challenge at every 4 days against Grammatis's every 4 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.

Calcul Mental Challenge ships an update every 4 days, Grammatis every 4 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calcul Mental Challenge | Grammatis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Size | 196 MB | 15 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Laurent BOST](https://appshunter.io/developer/1891585206) | [Christophe Auclair](https://appshunter.io/developer/1333526155) |

## What reviewers say

### Calcul Mental Challenge

[App page](https://appshunter.io/ios/app/calcul-mental-challenge/id6761807166)

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

**In-app purchases:** none


### Grammatis

[App page](https://appshunter.io/ios/app/grammatis/id6769785196)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calcul Mental Challenge free?

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

### Is Grammatis free?

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

### Do Calcul Mental Challenge or Grammatis have ads?

Neither Calcul Mental Challenge nor Grammatis shows ads.

### Which is updated more often, Calcul Mental Challenge or Grammatis?

Calcul Mental Challenge ships an update every 4 days, and Grammatis every 4 months. Most recently, Calcul Mental Challenge was updated on October 25, 2026 and Grammatis on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*