# Subnet Calculator + vs About Subnet Mask

The clearest difference is rating: About Subnet Mask at 5.0 against Subnet Calculator +'s 4.0. About Subnet Mask also leads on in-app purchases (none vs 4) and update cadence (every 9 days vs every 64 months). Subnet Calculator +'s advantage is ads (none vs shown) and ratings volume (7 vs 1). On price and device support there is nothing between them.

Both are free to download. Subnet Calculator + sells 4 one-off in-app purchases. About Subnet Mask asks for nothing beyond the download.

About Subnet Mask holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Subnet Calculator + has 7 ratings behind it against 1, so its average is the more settled of the two.

Subnet Calculator + ships an update every 64 months, About Subnet Mask every 9 days. The most recent releases landed on June 7, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Subnet Calculator + | About Subnet Mask |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (7 ratings)](https://appshunter.io/ios/app/subnet-calculator-plus/id445990645/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/about-subnet-mask/id1662782439/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 64 months | **Every 9 days** |
| Monetization | **Free** | Ad-supported |
| Size | 1 MB | 9 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steven Eppler](https://appshunter.io/developer/312274388) | [Jaehwa Noh](https://appshunter.io/developer/1629220949) |

## What reviewers say

### Subnet Calculator +

[App page](https://appshunter.io/ios/app/subnet-calculator-plus/id445990645)

This utility app simplifies network calculations for professionals and students. It offers tools for IPv4 and IPv6 subnetting, including live CIDR sliders and subnet splitting. Results can be easily shared or copied.

**Highlights:** IPv4 subnet calculator with CIDR slider, Subnet Splitter for VLSM, IPv6 calculator with prefix slider, Auto-detect device IP from Wi-Fi, Navigate adjacent subnets, Share or copy results, Native Mac support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Huge Tip | $9.99 | one-time |


### 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 Subnet Calculator + free?

Subnet Calculator + is free to download, with in-app purchases available.

### Is About Subnet Mask free?

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

### Which has better reviews, Subnet Calculator + or About Subnet Mask?

About Subnet Mask is rated higher. Subnet Calculator + averages 4.0 out of 5 from 7 ratings, while About Subnet Mask averages 5.0 from 1 ratings.

### Do Subnet Calculator + or About Subnet Mask have ads?

About Subnet Mask shows ads; Subnet Calculator + does not.

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

Subnet Calculator + ships an update every 64 months, and About Subnet Mask every 9 days. Most recently, Subnet Calculator + was updated on June 7, 2026 and About Subnet Mask on September 10, 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.*