# RPN Big Integer Calculator vs x

The clearest difference is device support: RPN Big Integer Calculator at 3 against x's 1. RPN Big Integer Calculator also leads on iOS requirement (9.3 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | RPN Big Integer Calculator | x |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rpn-big-integer-calculator/id1300713250/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | Free | — |
| Size | 19 MB | 1 MB |
| Requires iOS | **9.3** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Stephan Jancar](https://appshunter.io/developer/1107422127) | [FMILLET](https://appshunter.io/developer/550887984) |

## What reviewers say

### RPN Big Integer Calculator

[App page](https://appshunter.io/ios/app/rpn-big-integer-calculator/id1300713250)

This application provides a Reverse Polish Notation (RPN) calculator designed for handling very large numbers, up to 1024 bits. It specializes in prime number calculations and the factorization of substantial integers.

**Highlights:** RPN calculator interface, Big Integer support (up to 1024 bits), Prime Number Calculations, Factorization of large numbers

**Features:** macOS Compatibility

**In-app purchases:** none


### x

[App page](https://appshunter.io/ios/app/x-cal-plus/id6747112339)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN Big Integer Calculator free?

RPN Big Integer Calculator is free to download, with no in-app purchases.

### Is x free?

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

### Do RPN Big Integer Calculator or x have ads?

Neither RPN Big Integer Calculator nor x 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.*