# About Subnet Mask vs NetBits

The clearest difference is ads: NetBits at none against About Subnet Mask's shown. NetBits also leads on monetization model (free vs ad-supported). About Subnet Mask's advantage is update cadence (every 9 days vs monthly). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for About Subnet Mask against 5.0 for NetBits. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

About Subnet Mask ships an update every 9 days, NetBits monthly. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | About Subnet Mask | NetBits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/about-subnet-mask/id1662782439/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/netbits-ip-calculator/id6746674812/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Ad-supported | **Free** |
| Size | 9 MB | 3 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jaehwa Noh](https://appshunter.io/developer/1629220949) | [Vitaly Churkin](https://appshunter.io/developer/1765665325) |

## What reviewers say

### 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


### NetBits

[App page](https://appshunter.io/ios/app/netbits-ip-calculator/id6746674812)

This utility app quickly calculates IP subnet information. It provides network and broadcast addresses, usable host ranges, and binary representations for IPv4 addresses and subnet masks. Designed for network professionals and students, it offers a clean, ad-free experience.

**Highlights:** CIDR notation input, Network and broadcast address calculation, Usable host range display, Binary address and mask view, Offline functionality, Ad-free experience

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is About Subnet Mask free?

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

### Is NetBits free?

NetBits is free to download, with no in-app purchases.

### Which has better reviews, About Subnet Mask or NetBits?

About Subnet Mask and NetBits are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do About Subnet Mask or NetBits have ads?

About Subnet Mask shows ads; NetBits does not.

### Which is updated more often, About Subnet Mask or NetBits?

About Subnet Mask ships an update every 9 days, and NetBits monthly. Most recently, About Subnet Mask was updated on September 10, 2026 and NetBits on September 22, 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.*