# FusionMobile vs About Subnet Mask

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

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

FusionMobile ships an update monthly, About Subnet Mask every 9 days. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | FusionMobile | 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** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | — | Ad-supported |
| Size | 126 MB | 9 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [xFusion Digital Technologies Co., Ltd.](https://appshunter.io/developer/1639079473) | [Jaehwa Noh](https://appshunter.io/developer/1629220949) |

## What reviewers say

### FusionMobile

[App page](https://appshunter.io/ios/app/fusionmobile/id1639079471)

**In-app purchases:** none


### 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 FusionMobile free?

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

### Is About Subnet Mask free?

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

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

About Subnet Mask shows ads; FusionMobile does not.

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

FusionMobile ships an update monthly, and About Subnet Mask every 9 days. Most recently, FusionMobile was updated on September 28, 2026 and About Subnet Mask on September 29, 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.*