# Subnet Mask Wheel vs WP 31s

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.

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.

## The numbers

| Metric | Subnet Mask Wheel | WP 31s |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/subnet-mask-wheel/id560947458/reviews)** | [4.9 (15 ratings)](https://appshunter.io/ios/app/wp-31s/id973621300/reviews) |
| Number of ratings | 1 | **15** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 16 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Furuya](https://appshunter.io/developer/503779747) | [Pascal Meheut](https://appshunter.io/developer/620255097) |

## What reviewers say

### Subnet Mask Wheel

[App page](https://appshunter.io/ios/app/subnet-mask-wheel/id560947458)

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.

**Highlights:** Decimal subnet mask display, Binary subnet mask display, CIDR notation display, Host address count, Input via picker, slider, or buttons

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |


### WP 31s

[App page](https://appshunter.io/ios/app/wp-31s/id973621300)

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.

**Highlights:** RPN scientific calculator emulation, Rich function set, Simplified, less cluttered keyboard, Based on WP 34s, Available on iOS

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subnet Mask Wheel free?

Subnet Mask Wheel is free to download, with in-app purchases available.

### Is WP 31s free?

WP 31s is free to download, with no in-app purchases.

### Which has better reviews, Subnet Mask Wheel or WP 31s?

Subnet Mask Wheel is rated higher. Subnet Mask Wheel averages 5.0 out of 5 from 1 ratings, while WP 31s averages 4.9 from 15 ratings.

### Do Subnet Mask Wheel or WP 31s have ads?

Subnet Mask Wheel shows ads; WP 31s does not.

### Which is updated more often, Subnet Mask Wheel or WP 31s?

Subnet Mask Wheel ships an update every 5 months, and WP 31s every 10 months. Most recently, Subnet Mask Wheel was updated on July 6, 2026 and WP 31s on June 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*