# IPv6 Subneting vs CIDR

The clearest difference is in-app purchases: IPv6 Subneting at none against CIDR's 1. IPv6 Subneting also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (10.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. CIDR sells 1 one-off in-app purchase. IPv6 Subneting asks for nothing beyond the download.

IPv6 Subneting ships an update weekly, CIDR every 3 weeks. The most recent releases landed on January 8, 2026 and June 30, 2026 respectively.

## The numbers

| Metric | IPv6 Subneting | CIDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | — | Free |
| Size | 12 MB | 23 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chuk Fong Ng](https://appshunter.io/developer/1086110905) | [ao-system, Inc.](https://appshunter.io/developer/1338624340) |

## What reviewers say

### IPv6 Subneting

[App page](https://appshunter.io/ios/app/ipv6-subneting/id1147206940)

**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 IPv6 Subneting free?

IPv6 Subneting is free to download, with no in-app purchases.

### Is CIDR free?

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

### Do IPv6 Subneting or CIDR have ads?

Neither IPv6 Subneting nor CIDR shows ads.

### Which is updated more often, IPv6 Subneting or CIDR?

IPv6 Subneting ships an update weekly, and CIDR every 3 weeks. Most recently, IPv6 Subneting was updated on January 8, 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.*