# RPN vs CalcBoard

The clearest difference is price: CalcBoard at Free against RPN's $4.99. CalcBoard also leads on update cadence (every 3 months vs every 7 months). RPN's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

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

RPN ships an update every 7 months, CalcBoard every 3 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RPN | CalcBoard |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calcboard-multi-calculator/id6759535339/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 50 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Steven Davies](https://appshunter.io/developer/1705785558) | [Colby Clark](https://appshunter.io/developer/1110053823) |

## What reviewers say

### RPN

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

**Features:** Vision Pro support

**In-app purchases:** none


### CalcBoard

[App page](https://appshunter.io/ios/app/calcboard-multi-calculator/id6759535339)

Perform multiple calculations simultaneously on one screen, compare prices side-by-side, and access various modes like scientific and programmer. This ad-free utility offers precise results and stores your data locally.

**Highlights:** Multiple independent calculator panels, Side-by-side price comparison, Scientific, programmer, and unit converter modes, Visible expression history, Shared value tray for chaining calculations, Named variables for complex formulas, Ad-free and no tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcBoard Premium | $2.99 | one-time |


## Frequently asked questions

### Is RPN free?

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

### Is CalcBoard free?

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

### Do RPN or CalcBoard have ads?

Neither RPN nor CalcBoard shows ads.

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

RPN ships an update every 7 months, and CalcBoard every 3 months. Most recently, RPN was updated on November 3, 2026 and CalcBoard on October 31, 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.*