# CIDR vs SiteWeb Insight

The clearest difference is in-app purchases: SiteWeb Insight at none against CIDR's 1. SiteWeb Insight also leads on iOS requirement (12.0 vs 15.6). CIDR's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

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

CIDR ships an update every 3 weeks, SiteWeb Insight every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | CIDR | SiteWeb Insight |
| --- | --- | --- |
| 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 | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 23 MB | 44 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [Vertiv](https://appshunter.io/developer/1288641397) |

## 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 |


### SiteWeb Insight

[App page](https://appshunter.io/ios/app/siteweb-insight/id1672459051)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CIDR free?

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

### Is SiteWeb Insight free?

SiteWeb Insight is free to download, with no in-app purchases.

### Do CIDR or SiteWeb Insight have ads?

Neither CIDR nor SiteWeb Insight shows ads.

### Which is updated more often, CIDR or SiteWeb Insight?

CIDR ships an update every 3 weeks, and SiteWeb Insight every 2 months. Most recently, CIDR was updated on November 3, 2026 and SiteWeb Insight 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.*