WP 31s vs PDF Images Extract
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
PDF Images Extract
Easily extract, view, and save images from any PDF file directly on your device. This tool offers a fast and private way to access embedded visuals without needing an internet connection. Export images to Files, clipboard, or share them instantly.
- Extract images from PDFs
- On-device processing
- Fast and intuitive interface
- Export to Files app
- Copy to clipboard
- Share instantly
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PDF Image Extractor — Fast. Private. On-Device. Unlock the full potential of your PDFs with PDF Image Extractor — the easiest way to extract, view, and save images from any PDF file. 100% On-Device No internet required. Your data stays private. Blazing Fast & Intuitive Extract illustrations, graphics, and embedded visuals in seconds — no clutter, no fuss. One Tap to Export Save to Files, copy to clipboard, or share instantly. Whether you're a designer, student, researcher, or collector — PDF Image Extractor helps you grab exactly what you need, effortlessly. - Say goodbye to complex workflows. - Download now and experience clean, powerful PDF image extraction.
Screenshots
Verdict
The clearest difference is price: WP 31s at Free against PDF Images Extract's $1.99. WP 31s also leads on rating (4.9 vs 1.0) and ratings volume (15 vs 1). On ads, 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
WP 31s is free to download; PDF Images Extract costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WP 31s holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: WP 31s has 15 ratings behind it against 1, so its average is the more settled of the two.
WP 31s ships an update every 10 months, PDF Images Extract every 22 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.
| Parameter | WP 31s | PDF Images Extract |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.9 (15 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 15 — better | 1 |
| Update frequency | Every 10 months — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 16 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal Meheut | Jorge Lucioni Charalla |
Customer experience
WP 31s
PDF Images Extract
In-app purchases
WP 31s
No in-app purchases
PDF Images Extract
No in-app purchases
