# CaIculator vs RPN

The clearest difference is price: CaIculator at Free against RPN's $4.99. CaIculator also leads on iOS requirement (12.0 vs 16.6). RPN's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support there is nothing between them.

CaIculator is free to download; RPN costs $4.99 up front. CaIculator sells 1 one-off in-app purchase. RPN asks for nothing beyond the download.

CaIculator ships an update every 5 months, RPN every 7 months. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | CaIculator | RPN |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.9 (27 ratings)](https://appshunter.io/ios/app/caiculator/id6447991457/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 1 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Edison Largo](https://appshunter.io/developer/978541799) | [Steven Davies](https://appshunter.io/developer/1705785558) |

## What reviewers say

### CaIculator

[App page](https://appshunter.io/ios/app/caiculator/id6447991457)

A simple and intuitive calculator app designed for ease of use. It offers features like a backspace key, decimal point/comma support, calculation history, and customizable themes. Regular updates ensure continuous improvement.

**Highlights:** Intuitive interface with large buttons, Backspace key for corrections, Decimal point or comma support, Calculation history display, Two customizable themes, Regular updates with new features

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### RPN

[App page](https://appshunter.io/ios/app/rpn-calc/id6464329997)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CaIculator free?

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

### Is RPN free?

RPN costs $4.99, with no in-app purchases.

### Do CaIculator or RPN have ads?

CaIculator shows ads; RPN does not.

### Which is updated more often, CaIculator or RPN?

CaIculator ships an update every 5 months, and RPN every 7 months. Most recently, CaIculator was updated on October 24, 2026 and RPN on October 4, 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.*