# Subnet Mask Calc vs Skillmine Authenticator

The clearest difference is ads: Skillmine Authenticator at none against Subnet Mask Calc's shown. Skillmine Authenticator 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.

Subnet Mask Calc ships an update every 5 months, Skillmine Authenticator every 7 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Subnet Mask Calc | Skillmine Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (22 ratings)](https://appshunter.io/ios/app/subnet-mask-calc/id406375326/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 38.9% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Ad-supported | — |
| Size | 3 MB | 69 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [John Rouda](https://appshunter.io/developer/396597129) | [SKILLMINE TECHNOLOGY CONSULTING PRIVATE LIMITED](https://appshunter.io/developer/1789106848) |

## What reviewers say

### Subnet Mask Calc

[App page](https://appshunter.io/ios/app/subnet-mask-calc/id406375326)

This free utility app quickly calculates subnet masks and wildcard masks for IPv4 networks. It's designed for IT professionals and students to simplify complex networking tasks and aid in certification preparation, offering offline functionality.

**Highlights:** Lightning-fast subnet calculations, Offline network connectivity, Calculates IP and wildcard masks, User-friendly interface, Ideal for IT engineers, Learning aid for certifications

**Features:** macOS Compatibility

**In-app purchases:** none


### Skillmine Authenticator

[App page](https://appshunter.io/ios/app/skillmine-authenticator/id6745257114)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subnet Mask Calc free?

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

### Is Skillmine Authenticator free?

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

### Do Subnet Mask Calc or Skillmine Authenticator have ads?

Subnet Mask Calc shows ads; Skillmine Authenticator does not.

### Which is updated more often, Subnet Mask Calc or Skillmine Authenticator?

Subnet Mask Calc ships an update every 5 months, and Skillmine Authenticator every 7 months. Most recently, Subnet Mask Calc was updated on September 8, 2026 and Skillmine Authenticator on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*