# RPN vs Scanner Pro OCR

The clearest difference is update cadence: RPN at every 6 months against Scanner Pro OCR's every 21 months. RPN also leads on iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

RPN costs $1.99 and Scanner Pro OCR $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 6 months, Scanner Pro OCR every 21 months. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | RPN | Scanner Pro OCR |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/rpn-35-sd/id956224485/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 21 months |
| Monetization | Paid | — |
| Size | 14 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Jorge Lucioni Charalla](https://appshunter.io/developer/1198674844) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-35-sd/id956224485)

This app emulates the first pocket scientific calculator, offering a photo-realistic vintage experience. It simulates original operating speeds and unique arithmetic bugs, with optional modern enhancements like non-volatile registers.

**Highlights:** Photo-realistic look-and-feel, Multiple vintage skins, Vintage and Enhanced modes, Optional key-click and key-glow, Swipe to correct input, Display stack and memory registers

**Features:** macOS Compatibility

**In-app purchases:** none


### Scanner Pro OCR

[App page](https://appshunter.io/ios/app/scanner-pro-ocr/id6467523293)

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

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $1.99, with no in-app purchases.

### Is Scanner Pro OCR free?

Scanner Pro OCR costs $1.99, with no in-app purchases.

### Do RPN or Scanner Pro OCR have ads?

Neither RPN nor Scanner Pro OCR shows ads.

### Which is updated more often, RPN or Scanner Pro OCR?

RPN ships an update every 6 months, and Scanner Pro OCR every 21 months. Most recently, RPN was updated on October 12, 2026 and Scanner Pro OCR on October 16, 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.*