WP 31s vs Stack RPN Calculator
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
Stack RPN Calculator
This scientific calculator displays major functions on screen and utilizes a stack for calculations. It supports a stack of up to 4 values but can store many more numbers depending on device memory.
- Visible scientific functions
- RPN (Reverse Polish Notation) input
- Stack display for up to 4 values
- Large number storage capacity
- Designed for iPhone and iPad
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RPN scientific calculator benefiting from the major scientific functions visible on the screen. The calculator shows a stack of up to 4 values but can store a large number of numbers (depends on the phone's memory).
Screenshots
Verdict
The clearest difference is review sentiment: WP 31s at 100% against Stack RPN Calculator's 33%. WP 31s also leads on rating (4.9 vs 3.5) and ratings volume (15 vs 2). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
WP 31s holds the better App Store score, 4.9 against 3.5. That said, the two scores are not equally well evidenced: WP 31s has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of WP 31s's written reviews are positive against 33% of Stack RPN Calculator's.
| Parameter | WP 31s | Stack RPN Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (15 ratings) — better | 3.5 (2 ratings) |
| Positive reviews | 100.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 15 — better | 2 |
| Update frequency | Every 10 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal Meheut | Dario Bersiga |
Customer experience
WP 31s
Stack RPN Calculator
In-app purchases
WP 31s
No in-app purchases
Stack RPN Calculator
No in-app purchases
