# WP 31s vs DB40X

WP 31s and DB40X both sit at 4.9 stars, but that hides the real split: 100% of WP 31s's written reviews are positive against 67% of DB40X's. WP 31s also leads on iOS requirement (12.0 vs 14.0). DB40X's advantage is update cadence (every 3 weeks vs every 10 months). On price, rating, ratings volume 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.

WP 31s holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews point the same way: 100% of WP 31s's written reviews are positive against 67% of DB40X's.

WP 31s ships an update every 10 months, DB40X every 3 weeks. The most recent releases landed on September 25, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | WP 31s | DB40X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (15 ratings)](https://appshunter.io/ios/app/wp-31s/id973621300/reviews)** | [4.7 (7 ratings)](https://appshunter.io/ios/app/db40x/id6624315901/reviews) |
| Number of ratings | **15** | 7 |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 16 MB | 7 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pascal Meheut](https://appshunter.io/developer/620255097) | [Christophe de Dinechin](https://appshunter.io/developer/1761608161) |

## What reviewers say

### 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


### DB40X

[App page](https://appshunter.io/ios/app/db40x/id6624315901)

A high-precision scientific calculator inspired by the HP48 series, offering arbitrary precision computations, complex numbers, vectors, matrices, and graphing. It supports RPN and algebraic operations, with over 1000 built-in functions and a hyperlinked help system.

**Highlights:** Arbitrary precision computations, RPN and algebraic operations, Complex numbers, vectors, and matrices, Graphing and plotting, Engineering units and conversions, Hyperlinked help system

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WP 31s free?

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

### Is DB40X free?

DB40X is free to download, with no in-app purchases.

### Which has better reviews, WP 31s or DB40X?

WP 31s is rated higher. WP 31s averages 4.9 out of 5 from 15 ratings, while DB40X averages 4.7 from 7 ratings.

### Do WP 31s or DB40X have ads?

Neither WP 31s nor DB40X shows ads.

### Which is updated more often, WP 31s or DB40X?

WP 31s ships an update every 10 months, and DB40X every 3 weeks. Most recently, WP 31s was updated on September 25, 2026 and DB40X on October 3, 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.*