# Subnetwork vs CIDR

The clearest difference is rating: CIDR at 5.0 against Subnetwork's 4.4. CIDR also leads on update cadence (every 3 weeks vs every 3 months). Subnetwork's advantage is in-app purchases (none vs 1) and ratings volume (7 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. Subnetwork asks for nothing beyond the download.

CIDR holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Subnetwork has 7 ratings behind it against 1, so its average is the more settled of the two.

Subnetwork ships an update every 3 months, CIDR every 3 weeks. The most recent releases landed on September 4, 2026 and June 30, 2026 respectively.

## The numbers

| Metric | Subnetwork | CIDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/subnetwork/id1523667659/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 23 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Smart](https://appshunter.io/developer/1523667661) | [ao-system, Inc.](https://appshunter.io/developer/1338624340) |

## What reviewers say

### Subnetwork

[App page](https://appshunter.io/ios/app/subnetwork/id1523667659)

This app is a comprehensive IPv4 subnet calculator designed for both students and IT professionals. It offers intuitive tools for calculating single subnets, FLSM, and VLSM, with options for detailed binary calculations and saving subnet configurations.

**Highlights:** IPv4 subnet calculation, FLSM subnet generation, VLSM subnet generation, Detailed binary calculations, Save and retrieve subnet configurations, Intuitive user interface

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

**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 Subnetwork free?

Subnetwork 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, Subnetwork or CIDR?

CIDR is rated higher. Subnetwork averages 4.4 out of 5 from 7 ratings, while CIDR averages 5.0 from 1 ratings.

### Do Subnetwork or CIDR have ads?

Neither Subnetwork nor CIDR shows ads.

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

Subnetwork ships an update every 3 months, and CIDR every 3 weeks. Most recently, Subnetwork was updated on September 4, 2026 and CIDR on June 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*