# Subnet Calculator + vs CIDR

The clearest difference is rating: CIDR at 5.0 against Subnet Calculator +'s 4.0. CIDR also leads on update cadence (every 3 weeks vs every 64 months) and iOS requirement (15.6 vs 18.6). Subnet Calculator +'s advantage is ratings volume (7 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Subnet Calculator + sells 4 one-off in-app purchases and CIDR sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CIDR holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Subnet Calculator + has 7 ratings behind it against 1, so its average is the more settled of the two.

Subnet Calculator + ships an update every 64 months, CIDR every 3 weeks. The most recent releases landed on September 27, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Subnet Calculator + | CIDR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (7 ratings)](https://appshunter.io/ios/app/subnet-calculator-plus/id445990645/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cidr/id1564239813/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 64 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 23 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steven Eppler](https://appshunter.io/developer/312274388) | [akira ohmachi](https://appshunter.io/developer/1338624340) |

## What reviewers say

### Subnet Calculator +

[App page](https://appshunter.io/ios/app/subnet-calculator-plus/id445990645)

This utility app simplifies network calculations for professionals and students. It offers tools for IPv4 and IPv6 subnetting, including live CIDR sliders and subnet splitting. Results can be easily shared or copied.

**Highlights:** IPv4 subnet calculator with CIDR slider, Subnet Splitter for VLSM, IPv6 calculator with prefix slider, Auto-detect device IP from Wi-Fi, Navigate adjacent subnets, Share or copy results, Native Mac support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Huge Tip | $9.99 | one-time |


### 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 Subnet Calculator + free?

Subnet Calculator + is free to download, with in-app purchases available.

### Is CIDR free?

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

### Which has better reviews, Subnet Calculator + or CIDR?

CIDR is rated higher. Subnet Calculator + averages 4.0 out of 5 from 7 ratings, while CIDR averages 5.0 from 1 ratings.

### Do Subnet Calculator + or CIDR have ads?

Neither Subnet Calculator + nor CIDR shows ads.

### Which is updated more often, Subnet Calculator + or CIDR?

Subnet Calculator + ships an update every 64 months, and CIDR every 3 weeks. Most recently, Subnet Calculator + was updated on September 27, 2026 and CIDR on October 2, 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.*