# Subnetting Calculator vs CIDR

The clearest difference is rating: CIDR at 5.0 against Subnetting Calculator's 3.8. CIDR also leads on update cadence (every 3 weeks vs every 26 months). Subnetting Calculator's advantage is in-app purchases (none vs 1) and ratings volume (4 vs 1). On price, ads, monetization model and device support there is nothing between them.

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

CIDR holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Subnetting Calculator ships an update every 26 months, CIDR every 3 weeks. The most recent releases landed on June 7, 2026 and June 30, 2026 respectively.

## The numbers

| Metric | Subnetting Calculator | CIDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/subnetting-calculator/id729985998/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** |
| Number of ratings | **4** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 5 MB | 23 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rooster Glue, Inc.](https://appshunter.io/developer/729986001) | [ao-system, Inc.](https://appshunter.io/developer/1338624340) |

## What reviewers say

### Subnetting Calculator

[App page](https://appshunter.io/ios/app/subnetting-calculator/id729985998)

This utility calculates IPv4 IP address ranges, host counts, broadcast addresses, and subnet masks. It supports both traditional classful and classless (CIDR) subnet mask calculations for network administrators.

**Highlights:** IPv4 IP address range calculation, Host number calculation, Broadcast address calculation, Subnet mask calculation, Classful subnetting (A, B, C), Classless Inter-Domain Routing (CIDR)

**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 Subnetting Calculator free?

Subnetting Calculator 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, Subnetting Calculator or CIDR?

CIDR is rated higher. Subnetting Calculator averages 3.8 out of 5 from 4 ratings, while CIDR averages 5.0 from 1 ratings.

### Do Subnetting Calculator or CIDR have ads?

Neither Subnetting Calculator nor CIDR shows ads.

### Which is updated more often, Subnetting Calculator or CIDR?

Subnetting Calculator ships an update every 26 months, and CIDR every 3 weeks. Most recently, Subnetting Calculator was updated on June 7, 2026 and CIDR on June 30, 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.*