# About Subnet Mask vs UnivAuditTool

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

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

About Subnet Mask ships an update every 9 days, UnivAuditTool every 11 days. The most recent releases landed on October 15, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | About Subnet Mask | UnivAuditTool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/about-subnet-mask/id1662782439/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 11 days |
| Monetization | Ad-supported | — |
| Size | 9 MB | 27 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jaehwa Noh](https://appshunter.io/developer/1629220949) | [书源 张](https://appshunter.io/developer/1822285171) |

## 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


### UnivAuditTool

[App page](https://appshunter.io/ios/app/univaudittool/id6747732455)

**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 UnivAuditTool free?

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

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

About Subnet Mask shows ads; UnivAuditTool does not.

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

About Subnet Mask ships an update every 9 days, and UnivAuditTool every 11 days. Most recently, About Subnet Mask was updated on October 15, 2026 and UnivAuditTool on October 28, 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.*