# RPN vs Annotation Control

The clearest difference is price: Annotation Control at Free against RPN's $2.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Annotation Control is free to download; RPN costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | RPN | Annotation Control |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/rpn-25-ce/id1529311398/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 28 MB | 44 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Williams Sound, LLC](https://appshunter.io/developer/709827064) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-25-ce/id1529311398)

This app is a photo-realistic simulation of the classic HP-25 scientific calculator. It offers advanced programming features, a vast function library, and modern enhancements for enhanced usability on iOS devices.

**Highlights:** Photo-realistic simulation, Programmable (99/999 steps), 15 user-defined function keys, 100 symbolic labels, 100 visible registers, Program library with 150+ programs, Over 270 functions

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

**In-app purchases:** none


### Annotation Control

[App page](https://appshunter.io/ios/app/annotation-control/id1549095503)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $2.99, with no in-app purchases.

### Is Annotation Control free?

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

### Do RPN or Annotation Control have ads?

Neither RPN nor Annotation Control 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.*