# CIDR vs IT電卓+

The clearest difference is in-app purchases: IT電卓+ at none against CIDR's 1. CIDR's advantage is ads (none vs shown). 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. IT電卓+ asks for nothing beyond the download.

## The numbers

| Metric | CIDR | IT電卓+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | — |
| Monetization | Free | — |
| Size | 23 MB | 4 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) |

## 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 |


### IT電卓+

[App page](https://appshunter.io/ios/app/it-plus/id6774959562)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CIDR free?

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

### Is IT電卓+ free?

IT電卓+ is free to download, with no in-app purchases.

### Do CIDR or IT電卓+ have ads?

IT電卓+ shows ads; CIDR does not.

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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.*