# RPN vs WP 31s

RPN and WP 31s both sit at 5.0 stars, but that hides the real split: 100% of WP 31s's written reviews are positive against 83% of RPN's. WP 31s also leads on ratings volume (15 vs 3) and device support (3 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for RPN against 4.9 for WP 31s. That said, the two scores are not equally well evidenced: WP 31s has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 83% of RPN's written reviews are positive against 100% of WP 31s's.

RPN ships an update every 9 months, WP 31s every 10 months. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | RPN | WP 31s |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rpn-70-hd/id436127144/reviews)** | [4.9 (15 ratings)](https://appshunter.io/ios/app/wp-31s/id973621300/reviews) |
| Number of ratings | 3 | **15** |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 14 MB | 16 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Pascal Meheut](https://appshunter.io/developer/620255097) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-70-hd/id436127144)

This app provides a photo-realistic simulation of a rare 1974 financial calculator, offering full functionality for loan amortization, saving plans, and depreciation. It features an authentic design with animated keys and an optional live register view.

**Highlights:** Photo-realistic design, Live register view, Animated keys with sound, Full HP-70 function implementation, Cut/copy/paste display value, Built-in manual with examples

**Features:** macOS Compatibility

**In-app purchases:** none


### WP 31s

[App page](https://appshunter.io/ios/app/wp-31s/id973621300)

This app emulates a classic RPN scientific calculator, offering a rich function set for daily use with a simplified interface. It's based on the more complex WP 34s but is designed for easier operation.

**Highlights:** RPN scientific calculator emulation, Rich function set, Simplified, less cluttered keyboard, Based on WP 34s, Available on iOS

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is WP 31s free?

WP 31s is free to download, with no in-app purchases.

### Which has better reviews, RPN or WP 31s?

RPN is rated higher. RPN averages 5.0 out of 5 from 3 ratings, while WP 31s averages 4.9 from 15 ratings.

### Do RPN or WP 31s have ads?

Neither RPN nor WP 31s shows ads.

### Which is updated more often, RPN or WP 31s?

RPN ships an update every 9 months, and WP 31s every 10 months. Most recently, RPN was updated on November 4, 2026 and WP 31s on November 2, 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.*