i48 vs WP 31s
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i48
This application emulates the HP48GX calculator on your iPhone or iPod touch. It allows you to perform complex calculations like matrix operations and function integration on the go.
- HP48GX calculator emulation
- Matrix calculations
- Function integration
- Mobile calculator
- On-the-go calculations
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i48 is an emulator for the HP48GX calculator, so the next time you're out and about and need to do some quick matrix calculations or work out the integral of a function, just whip out your iPhone (or iPod touch) and have at it
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
Screenshots
Verdict
The clearest difference is review sentiment: WP 31s at 100% against i48's 54%. WP 31s also leads on rating (4.9 vs 3.5) and monetization model (free vs paid). i48's advantage is ratings volume (196 vs 15) and update cadence (every 4 months vs every 10 months). On price, 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
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: i48 has 196 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 54% of i48's written reviews are positive against 100% of WP 31s's.
i48 ships an update every 4 months, WP 31s every 10 months. The most recent releases landed on October 8, 2026 and September 25, 2026 respectively.
| Parameter | i48 | WP 31s |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (196 ratings) | 4.9 (15 ratings) — better |
| Positive reviews | 54.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 196 — better | 15 |
| Update frequency | Every 4 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 4 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Automagic Software Pty Ltd | Pascal Meheut |
Customer experience
i48
WP 31s
Bugs and requests
i48
Reported bugs
4 issues- Memory recovery prompt not working
- Cursor keys behaving erratically
- Equation solver locking up the app
- Keyboard issues on certain devices
Requested features
4 requests- Landscape mode support
- Improved display resolution and graphics
- Haptic feedback for button presses
- Ability to assign units to numbers
WP 31s
Not enough reviews yet to summarise bugs or requests.
In-app purchases
i48
No in-app purchases
WP 31s
No in-app purchases
