WP 31s vs PaletteCalculator
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
PaletteCalculator
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PaletteCalculator has the following functions ・display of calculation formula ・history ・memory ・undo ・selection of calculation formulas by cursor / partial selection / overall selection PaletteCalculator supports the following functions ・sin ・cos ・tan ・arcsin ・arccos ・arctan ・sinh ・cosh ・tanh ・arcsinh ・arccosh ・arctanh ・exp ・log ・power ・root ・factorical ・nPk ・nCk ・nHk ・tax
Screenshots
Verdict
The clearest difference is ads: WP 31s at none against PaletteCalculator's shown. On price, update cadence, in-app purchases and device support 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 ships an update every 10 months, PaletteCalculator every 6 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.
| Parameter | WP 31s | PaletteCalculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (15 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 10 months | Every 6 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 16 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal Meheut | Towa TAKEUCHI |
In-app purchases
WP 31s
No in-app purchases
PaletteCalculator
No in-app purchases
