# About Subnet Mask vs MasterSet

The clearest difference is in-app purchases: About Subnet Mask at none against MasterSet's 2. MasterSet's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. MasterSet sells 2 in-app purchases, starting at $3.99 per month. About Subnet Mask asks for nothing beyond the download.

About Subnet Mask ships an update every 9 days, MasterSet every 2 weeks. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | About Subnet Mask | MasterSet |
| --- | --- | --- |
| 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** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Ad-supported | — |
| Size | 9 MB | 46 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jaehwa Noh](https://appshunter.io/developer/1629220949) | [Jessy Valis](https://appshunter.io/developer/6809316189) |

## 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


### MasterSet

[App page](https://appshunter.io/ios/app/masterset/id6809316187)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MasterSet Premium Annuel | $3.99 | per month |
| MasterSet Premium Annuel | $29.99 | per year |


## Frequently asked questions

### Is About Subnet Mask free?

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

### Is MasterSet free?

MasterSet is free to download, with in-app purchases available.

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

About Subnet Mask shows ads; MasterSet does not.

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

About Subnet Mask ships an update every 9 days, and MasterSet every 2 weeks. Most recently, About Subnet Mask was updated on October 15, 2026 and MasterSet on October 14, 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.*