WP 31s vs MultiiCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WP 31s
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.
- RPN scientific calculator emulation
- Rich function set
- Simplified, less cluttered keyboard
- Based on WP 34s
- Available on iOS
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WP 31s is a classic RPN scientific calculator based on the powerful but more complex WP 34s. Now available on iOS too (see the support site for other emulators and for the real stuff). It is not programmable but has a rich function set for daily use and is easier to use, thanks to a less cluttered keyboard. A manual can be downloaded at http://sourceforge.net/projects/wp34s/files/doc/Manual_wp_31s_1_2q.pdf/download
MultiiCalc
Save and reuse your important calculations. This tool lets you store named values to easily perform complex financial or cost analyses without losing track of intermediate steps. Share your results with others or export them to different applications.
- Save notable calculations by name
- Calculate against saved list items
- Track complex financial analyses
- Share calculations with friends
- Export calculations to other apps
- No analytics or tracking
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MultiiCalc allows you to keep your notable calculations saved to a list by name so that you can calculate other values against those list items later. Imagine you want to calculate the potential profit of a real estate investment, or the cost of a new home, perhaps the cost of a vacation. There are so many different fees and percentages that will need to be calculated that a simple calculator app will not be able to handle in one go. With MultiiCalc, you can save your values along the way and come back later - or just save and keep calculating so you don't lose track. You can even share your calculations with your friends or other apps! All of your data is YOUR data. I don't have any analytics or tracking in here, enjoy!
Screenshots
Verdict
WP 31s and MultiiCalc both sit at 4.9 stars, but that hides the real split: 100% of WP 31s's written reviews are positive against 50% of MultiiCalc's. WP 31s also leads on in-app purchases (none vs 3) and iOS requirement (12.0 vs 14.0). MultiiCalc's advantage is update cadence (monthly vs every 10 months). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. MultiiCalc sells 3 one-off in-app purchases. WP 31s asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for WP 31s against 5.0 for MultiiCalc. Both are backed by a comparable volume of ratings — 15 and 9 respectively. Written reviews are what separate them: 100% of WP 31s's written reviews are positive against 50% of MultiiCalc's.
WP 31s ships an update every 10 months, MultiiCalc monthly. The most recent releases landed on September 25, 2026 and October 3, 2026 respectively.
| Parameter | WP 31s | MultiiCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (15 ratings) | 5.0 (9 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 15 — better | 9 |
| Update frequency | Every 10 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 16 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal Meheut | Christina Schell |
Customer experience
WP 31s
MultiiCalc
In-app purchases
WP 31s
No in-app purchases
MultiiCalc
- A Generous Tip$1.99
- A Hefty Tip$3.99
- A Lavish Tip$6.99
