# CIDR vs CIDR Calc

The clearest difference is in-app purchases: CIDR Calc at none against CIDR's 1. CIDR's advantage is update cadence (every 3 weeks vs every 19 months). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for CIDR against 5.0 for CIDR Calc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

CIDR ships an update every 3 weeks, CIDR Calc every 19 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | CIDR | CIDR Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/cidr-calc/id1565667811/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 19 months |
| Monetization | Free | Free |
| Size | 23 MB | 1 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [Paul Smicker](https://appshunter.io/developer/1565667813) |

## What reviewers say

### 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 |


### CIDR Calc

[App page](https://appshunter.io/ios/app/cidr-calc/id1565667811)

Calculate subnet details, including IP addresses, masks, and reverse masks, using CIDR notation. Generate and share lists of subnets and hosts within the next higher octet. This tool simplifies network calculations for IT professionals and students.

**Highlights:** Subnet calculation, IP address display, Mask and reverse mask, Shareable subnet lists, Host calculation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CIDR free?

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

### Is CIDR Calc free?

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

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

CIDR and CIDR Calc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do CIDR or CIDR Calc have ads?

Neither CIDR nor CIDR Calc shows ads.

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

CIDR ships an update every 3 weeks, and CIDR Calc every 19 months. Most recently, CIDR was updated on November 3, 2026 and CIDR Calc on November 3, 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.*