# Plus 1 vs Calcul Mental Challenge

The clearest difference is price: Calcul Mental Challenge at Free against Plus 1's $2.99. Calcul Mental Challenge also leads on update cadence (every 4 days vs every 6 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Calcul Mental Challenge is free to download; Plus 1 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plus 1 ships an update every 6 months, Calcul Mental Challenge every 4 days. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Plus 1 | Calcul Mental Challenge |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Size | 6 MB | 196 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CROMBEZ Emmanuel](https://appshunter.io/developer/375656695) | [Laurent BOST](https://appshunter.io/developer/1891585206) |

## What reviewers say

### Plus 1

[App page](https://appshunter.io/ios/app/plus-1/id1142564014)

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

**In-app purchases:** none


### Calcul Mental Challenge

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Plus 1 free?

Plus 1 costs $2.99, with no in-app purchases.

### Is Calcul Mental Challenge free?

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

### Do Plus 1 or Calcul Mental Challenge have ads?

Neither Plus 1 nor Calcul Mental Challenge shows ads.

### Which is updated more often, Plus 1 or Calcul Mental Challenge?

Plus 1 ships an update every 6 months, and Calcul Mental Challenge every 4 days. Most recently, Plus 1 was updated on September 17, 2026 and Calcul Mental Challenge on September 14, 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.*