# RPN vs WP 31s

RPN and WP 31s are too close to call on the numbers: across 10 compared parameters — price, rating, review sentiment and ratings volume among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

WP 31s holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 11 and 15 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

RPN ships an update every 7 months, WP 31s every 10 months. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | RPN | WP 31s |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (11 ratings)](https://appshunter.io/ios/app/rpn-70-sd/id738422213/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/wp-31s/id973621300/reviews)** |
| Number of ratings | 11 | **15** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 17 MB | 16 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **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-sd/id738422213)

This app is a faithful simulation of a rare 1974 financial calculator, offering all its original functions with enhanced features like more memory registers and a visual stack display. It's designed for users who appreciate vintage technology and need precise financial calculations.

**Highlights:** Photo-realistic vintage calculator design, Full HP-70 function simulation, Animated keys with sound, Enhanced stack and memory register view, Cut/copy/paste display value, Input parameter visual indicators

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

**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?

WP 31s is rated higher. RPN averages 4.7 out of 5 from 11 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 7 months, and WP 31s every 10 months. Most recently, RPN was updated on October 20, 2026 and WP 31s on October 11, 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.*