# goRPN vs RPN

The clearest difference is price: goRPN at Free against RPN's $2.99. goRPN also leads on iOS requirement (9.0 vs 12.0). RPN's advantage is rating (4.3 vs 3.0) and review sentiment (80% vs 50%). On ads, in-app purchases and device support there is nothing between them.

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

RPN holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: RPN has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of goRPN's written reviews are positive against 80% of RPN's.

## The numbers

| Metric | goRPN | RPN |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/gorpn/id1212060693/reviews) | **[4.3 (10 ratings)](https://appshunter.io/ios/app/rpn-25-ce/id1529311398/reviews)** |
| Number of ratings | 1 | **10** |
| Positive reviews | 50.0% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 12 MB | 28 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Joel Perry](https://appshunter.io/developer/972887837) | [CuVee Software](https://appshunter.io/developer/424873503) |

## What reviewers say

### goRPN

[App page](https://appshunter.io/ios/app/gorpn/id1212060693)

This app emulates the functionality of the HP-16C calculator using a Reverse Polish Notation (RPN) input method. It is a minimal, open-source utility designed for users familiar with RPN calculators.

**Highlights:** RPN calculator, HP-16C stack emulation, Open-source software, Minimalist design, Future functionality expansion

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is goRPN free?

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

### Is RPN free?

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

### Which has better reviews, goRPN or RPN?

RPN is rated higher. goRPN averages 3.0 out of 5 from 1 ratings, while RPN averages 4.3 from 10 ratings.

### Do goRPN or RPN have ads?

Neither goRPN nor RPN shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*