# IP and Subnet Calculator vs About Subnet Mask

The clearest difference is in-app purchases: About Subnet Mask at none against IP and Subnet Calculator's 1. About Subnet Mask also leads on update cadence (every 9 days vs monthly). IP and Subnet Calculator's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. IP and Subnet Calculator sells 1 one-off in-app purchase. About Subnet Mask asks for nothing beyond the download.

IP and Subnet Calculator ships an update monthly, About Subnet Mask every 9 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | IP and Subnet Calculator | About Subnet Mask |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/about-subnet-mask/id1662782439/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | **Free** | Ad-supported |
| Size | 5 MB | 9 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Le Vu](https://appshunter.io/developer/888757091) | [Jaehwa Noh](https://appshunter.io/developer/1629220949) |

## What reviewers say

### IP and Subnet Calculator

[App page](https://appshunter.io/ios/app/ip-and-subnet-calculator/id1014969125)

This utility simplifies IP address and subnet calculations. It supports various input formats and provides binary and decimal views of IP addresses. The app also includes error checking for incorrect data inputs.

**Highlights:** Subnet Mask, CIDR, Wildcard Mask support, Host requirement calculation, Network navigation via swipe, Decimal and Binary IP views, Input data validation and alerts

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### About Subnet Mask

[App page](https://appshunter.io/ios/app/about-subnet-mask/id1662782439)

This utility tool calculates subnet masks based on IP and subnet inputs. It supports both IP and CIDR formats, determines class-based network numbers, and saves previous calculations for easy access. Users can also check the class of any IP address.

**Highlights:** Subnet mask calculation, IP and CIDR format support, Class-based network number calculation, IP class checking, Search history

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IP and Subnet Calculator free?

IP and Subnet Calculator is free to download, with in-app purchases available.

### Is About Subnet Mask free?

About Subnet Mask is free to download, with no in-app purchases.

### Do IP and Subnet Calculator or About Subnet Mask have ads?

About Subnet Mask shows ads; IP and Subnet Calculator does not.

### Which is updated more often, IP and Subnet Calculator or About Subnet Mask?

IP and Subnet Calculator ships an update monthly, and About Subnet Mask every 9 days. Most recently, IP and Subnet Calculator was updated on November 1, 2026 and About Subnet Mask on November 3, 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.*