# International maths guide vs Cat Probability Roulette

The clearest difference is in-app purchases: International maths guide at none against Cat Probability Roulette's 1. International maths guide also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Cat Probability Roulette's advantage is update cadence (every 2 months vs every 46 months). On price and device support there is nothing between them.

Both are free to download. Cat Probability Roulette sells 1 one-off in-app purchase. International maths guide asks for nothing beyond the download.

International maths guide ships an update every 46 months, Cat Probability Roulette every 2 months. The most recent releases landed on March 3, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | International maths guide | Cat Probability Roulette |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 46 months | **Every 2 months** |
| Size | 13 MB | 145 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [rahul baweja](https://appshunter.io/developer/804610215) | [Yusuke Okada](https://appshunter.io/developer/1793725878) |

## What reviewers say

### International maths guide

[App page](https://appshunter.io/ios/app/international-maths-guide/id1121180802)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cat Probability Roulette

[App page](https://appshunter.io/ios/app/cat-probability-roulette/id6754866024)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.49 | one-time |


## Frequently asked questions

### Is International maths guide free?

International maths guide is free to download, with no in-app purchases.

### Is Cat Probability Roulette free?

Cat Probability Roulette is free to download, with in-app purchases available.

### Do International maths guide or Cat Probability Roulette have ads?

Cat Probability Roulette shows ads; International maths guide does not.

### Which is updated more often, International maths guide or Cat Probability Roulette?

International maths guide ships an update every 46 months, and Cat Probability Roulette every 2 months. Most recently, International maths guide was updated on March 3, 2026 and Cat Probability Roulette on September 19, 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.*