# Subnet Mask

> Subnet mask calculator with CIDR notation and host address calculation. (iPhone/iPad app by Takahiro Furuya.)

- Source: https://appshunter.io/ios/app/subnet-mask/id580727679 (this page in markdown: same URL + `.md`)
- Developer: [Takahiro Furuya](https://appshunter.io/developer/503779747)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.61/5 from 31 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 5 MB
- Languages: English, Japanese
- Released: 2012-12-06
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/subnet-mask/id580727679/reviews.md

## What is Subnet Mask?

This is the keypad for subnet mask. 
It has keys of prefix (CIDR notation). The subnet mask and number of host addresses are shown by single tap.
Keys are manipulated also by swipe. It behaves like a slider.

This App can be mutated to the keypad for wildcard mask. It shows wild card mask and number of addresses.

## Key features

- Subnet mask calculation
- Host address calculation
- CIDR notation keypad
- Swipe key manipulation
- Wildcard mask calculation

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/subnet-mask/id580727679/reviews.md

### 5/5 — Easy to Use

*2024-02-12, version 2.1*

It is very friendly user.

### 5/5 — Very helpful App

*2018-10-02, version 1.5*

I like the concept of this app. I was a bit curious if anybody out there had made this kind if app so I searched it in the store. Turns out it did exist. Thank you for creating this.

## Frequently asked questions about Subnet Mask

### What is Subnet Mask used for?

Subnet Mask is used to quickly calculate subnet masks, the number of host addresses, and wildcard masks based on CIDR notation. It simplifies network calculations for IT professionals and students.

### Does Subnet Mask have ads?

Yes, Subnet Mask contains advertisements. This allows the app to remain free for users while providing essential networking tools.

### What devices does Subnet Mask support?

Subnet Mask is currently supported on iPhones. It is designed for mobile use on Apple's iOS platform.

### How often is Subnet Mask updated?

The latest version of Subnet Mask is 2.1.2, last updated on February 25, 2026. This indicates a history of updates, though the exact frequency is not specified.

### What is the age rating for Subnet Mask?

Subnet Mask has an age rating of 4+. This means it is suitable for users of all ages, with no mature content.

### Can Subnet Mask be used offline?

The provided description does not specify offline functionality. However, as a calculation tool, it is likely to function without an active internet connection for its core features.

### What are the in-app purchases for Subnet Mask?

The app has in-app purchases available. These likely offer enhanced features or an ad-free experience, though specific details are not provided in the description.

### How does Subnet Mask handle user input?

Subnet Mask uses a keypad for CIDR notation and allows keys to be manipulated by swiping, functioning like a slider. This offers an intuitive way to input network information.

## Version history (last 5 releases)

### 2.1.3 — 2026-04-25

Minor improvements

### 2.1.2 — 2026-02-25

Tracking is disabled, and personalized ads are unavailable. non‑personalized ads are served.

### 2.1.1 — 2026-01-30

Minor improvements

### 2.1 — 2023-07-10

Updated advertising functionality

### 2.0 — 2019-12-16

-Screen adjustment for iPhone X and iPhone 11
-Color adjustment in dark mode

## Apps similar to Subnet Mask

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| --- | --- | --- | --- |
| [SED-East](https://appshunter.io/ios/app/sed-east/id6474872329) | — | Free | Productivity |
| [Vimkey](https://appshunter.io/ios/app/vimkey/id1585682577) | 5.0 (5) | Free | Productivity |
| [Mr. Wong- Nice Network Helper](https://appshunter.io/ios/app/mr-wong-nice-network-helper/id6462084745) | 4.6 (14) | Free | Productivity |
| [Multi-Web Proxy Master](https://appshunter.io/ios/app/multi-web-proxy-master/id6479396579) | 4.2 (10) | Free | Productivity |
| [Xany VNC](https://appshunter.io/ios/app/xany-vnc/id6514319627) | — | $9.99 | Productivity |
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## More apps by Takahiro Furuya

- [IP Keypad Pro - Subnet Calc](https://appshunter.io/ios/app/ip-keypad-pro-subnet-calc/id503779744)
- [IP Keypad - Subnet Calculator](https://appshunter.io/ios/app/ip-keypad-subnet-calculator/id504232308)
- [Subnet Mask Wheel](https://appshunter.io/ios/app/subnet-mask-wheel/id560947458)
- [Subnet Gauge](https://appshunter.io/ios/app/subnet-gauge/id567064150)

All apps by Takahiro Furuya: https://appshunter.io/developer/503779747

## Related topics

[takahiro furuya](https://appshunter.io/ios/topics/takahiro-furuya) · [cisco packet tracer](https://appshunter.io/ios/topics/cisco-packet-tracer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*