# Probability Theory Foundations vs Roman Numerals & Dates

The clearest difference is in-app purchases: Probability Theory Foundations at none against Roman Numerals & Dates's 1. Probability Theory Foundations also leads on device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Roman Numerals & Dates sells 1 one-off in-app purchase. Probability Theory Foundations asks for nothing beyond the download.

## The numbers

| Metric | Probability Theory Foundations | Roman Numerals & Dates |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Size | 38 MB | 58 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [Ravinderjeet Dhillon](https://appshunter.io/developer/1896491671) |

## What reviewers say

### Probability Theory Foundations

[App page](https://appshunter.io/ios/app/probability-theory-foundations/id6773734025)

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

**In-app purchases:** none


### Roman Numerals & Dates

[App page](https://appshunter.io/ios/app/roman-numerals-and-dates/id6802918915)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Practice & Big Numbers | $2.99 | one-time |


## Frequently asked questions

### Is Probability Theory Foundations free?

Probability Theory Foundations is free to download, with no in-app purchases.

### Is Roman Numerals & Dates free?

Roman Numerals & Dates is free to download, with in-app purchases available.

### Do Probability Theory Foundations or Roman Numerals & Dates have ads?

Neither Probability Theory Foundations nor Roman Numerals & Dates shows ads.

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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.*