Subnet Mask Wheel vs WP 31s
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Subnet Mask Wheel
Easily convert subnet masks between decimal, binary, and CIDR notation. Quickly see the number of available host addresses for any given mask. Input masks using a picker, slider, or prefix length buttons.
- Decimal subnet mask display
- Binary subnet mask display
- CIDR notation display
- Host address count
- Input via picker, slider, or buttons
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This app displays the subnet mask in decimal, binary, prefix length(cidr notation). It displays the number of host addresses as well. You can enter the subnet mask in the following three ways. - Picker for decimal notation - Slider for binary - Buttons to increase/decrease prefix length
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 in-app purchases: WP 31s at none against Subnet Mask Wheel's 1. WP 31s also leads on ads (none vs shown) and ratings volume (15 vs 1). On price, rating and update cadence 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. Subnet Mask Wheel sells 1 one-off in-app purchase. WP 31s asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Subnet Mask Wheel against 4.9 for WP 31s. 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.
Subnet Mask Wheel ships an update every 5 months, WP 31s every 10 months. The most recent releases landed on July 6, 2026 and June 11, 2026 respectively.
| Parameter | Subnet Mask Wheel | WP 31s |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.9 (15 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 15 — better |
| Update frequency | Every 5 months — better | Every 10 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Takahiro Furuya | Pascal Meheut |
Customer experience
Subnet Mask Wheel
WP 31s
In-app purchases
Subnet Mask Wheel
- Remove ads$0.99
WP 31s
No in-app purchases
