# Calcul Mental Challenge vs Random Picker

The clearest difference is in-app purchases: Calcul Mental Challenge at none against Random Picker's 4. Calcul Mental Challenge also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Random Picker sells 4 in-app purchases, starting at $2.99 per 7 days. Calcul Mental Challenge asks for nothing beyond the download.

Calcul Mental Challenge ships an update every 4 days, Random Picker weekly. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Calcul Mental Challenge | Random Picker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Size | 196 MB | 8 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Laurent BOST](https://appshunter.io/developer/1891585206) | [ALEXANDRE JOSEPH PIERRE PAUL](https://appshunter.io/developer/1813388637) |

## 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


### Random Picker

[App page](https://appshunter.io/ios/app/random-picker-roulo/id6775554440)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Roulo Pro Weekly | $2.99 | per 7 days |
| Roulo Pro Monthly | $3.99 | per month |
| Roulo Pro Annual | $24.99 | per year |
| Roulo Pro | $1.99 | one-time |


## Frequently asked questions

### Is Calcul Mental Challenge free?

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

### Is Random Picker free?

Random Picker is free to download, with in-app purchases available.

### Do Calcul Mental Challenge or Random Picker have ads?

Neither Calcul Mental Challenge nor Random Picker shows ads.

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

Calcul Mental Challenge ships an update every 4 days, and Random Picker weekly. Most recently, Calcul Mental Challenge was updated on October 18, 2026 and Random Picker on October 7, 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.*