# Subnet Mask Calc vs CIDR

The clearest difference is rating: CIDR at 5.0 against Subnet Mask Calc's 2.3. CIDR also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 5 months). Subnet Mask Calc's advantage is in-app purchases (none vs 1) and ratings volume (22 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. CIDR sells 1 one-off in-app purchase. Subnet Mask Calc asks for nothing beyond the download.

CIDR holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: Subnet Mask Calc has 22 ratings behind it against 1, so its average is the more settled of the two.

Subnet Mask Calc ships an update every 5 months, CIDR every 3 weeks. The most recent releases landed on September 8, 2026 and June 30, 2026 respectively.

## The numbers

| Metric | Subnet Mask Calc | CIDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (22 ratings)](https://appshunter.io/ios/app/subnet-mask-calc/id406375326/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** |
| Number of ratings | **22** | 1 |
| Positive reviews | 38.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 3 MB | 23 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [John Rouda](https://appshunter.io/developer/396597129) | [ao-system, Inc.](https://appshunter.io/developer/1338624340) |

## 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


### CIDR

[App page](https://appshunter.io/ios/app/cidr/id1564239813)

This utility calculates IP address ranges from an IP address and subnet mask. It supports IPv4 calculations, including prefix display, address range counts, and bit notation. Useful for quick CIDR notation checks and subnet mask conversions.

**Highlights:** IP address range calculation, Subnet mask to CIDR conversion, IPv4 prefix display, Number of address ranges, Bit notation display, Quick reference table

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Subnet Mask Calc free?

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

### Is CIDR free?

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

### Which has better reviews, Subnet Mask Calc or CIDR?

CIDR is rated higher. Subnet Mask Calc averages 2.3 out of 5 from 22 ratings, while CIDR averages 5.0 from 1 ratings.

### Do Subnet Mask Calc or CIDR have ads?

Subnet Mask Calc shows ads; CIDR does not.

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

Subnet Mask Calc ships an update every 5 months, and CIDR every 3 weeks. Most recently, Subnet Mask Calc was updated on September 8, 2026 and CIDR on June 30, 2026.

---

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