# RPN Big Float Calculator vs x

The clearest difference is update cadence: x at fortnightly against RPN Big Float Calculator's monthly. RPN Big Float Calculator's advantage is device support (4 vs 1) and iOS requirement (14.1 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.

RPN Big Float Calculator ships an update monthly, x fortnightly. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | RPN Big Float Calculator | x |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 14 MB | 1 MB |
| Requires iOS | **14.1** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Stephan Jancar](https://appshunter.io/developer/1107422127) | [FMILLET](https://appshunter.io/developer/550887984) |

## What reviewers say

### RPN Big Float Calculator

[App page](https://appshunter.io/ios/app/rpn-big-float-calculator/id1312613680)

This advanced calculator offers unparalleled precision for complex mathematical operations, supporting up to 100,000 digits. It features both RPN mode and direct formula input, with a vast array of functions and built-in constants. Explore calculations with complex numbers, quaternions, and p-adic numbers.

**Highlights:** High precision up to 100,000 digits, RPN and direct formula input modes, Complex number and quaternion calculations, Elliptic integrals and theta-functions, Built-in mathematical constants, P-adic number calculations

**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 Float Calculator free?

RPN Big Float 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 Float Calculator or x have ads?

Neither RPN Big Float Calculator nor x shows ads.

### Which is updated more often, RPN Big Float Calculator or x?

RPN Big Float Calculator ships an update monthly, and x fortnightly. Most recently, RPN Big Float Calculator was updated on November 4, 2026 and x on November 8, 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.*