# Subnet Mask vs Simple Cidr

The clearest difference is in-app purchases: Simple Cidr at none against Subnet Mask's 1. Simple Cidr also leads on ads (none vs shown) and iOS requirement (17.6 vs 26.0). Subnet Mask's advantage is update cadence (every 6 months vs every 30 months). On price and device support there is nothing between them.

Both are free to download. Subnet Mask sells 1 one-off in-app purchase. Simple Cidr asks for nothing beyond the download.

Subnet Mask ships an update every 6 months, Simple Cidr every 30 months. The most recent releases landed on June 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Subnet Mask | Simple Cidr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (31 ratings)](https://appshunter.io/ios/app/subnet-mask/id580727679/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 months** | Every 30 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 0 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Furuya](https://appshunter.io/developer/503779747) | [Luke Pilkington](https://appshunter.io/developer/1515186312) |

## What reviewers say

### Subnet Mask

[App page](https://appshunter.io/ios/app/subnet-mask/id580727679)

This app provides a quick way to calculate subnet masks and host addresses. It features a keypad for CIDR notation and allows for manipulation of keys via swipe gestures, functioning like a slider. It can also be used to determine wildcard masks and the number of addresses.

**Highlights:** Subnet mask calculation, Host address calculation, CIDR notation keypad, Swipe key manipulation, Wildcard mask calculation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |


### Simple Cidr

[App page](https://appshunter.io/ios/app/simple-cidr/id1515186313)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subnet Mask free?

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

### Is Simple Cidr free?

Simple Cidr is free to download, with no in-app purchases.

### Do Subnet Mask or Simple Cidr have ads?

Subnet Mask shows ads; Simple Cidr does not.

### Which is updated more often, Subnet Mask or Simple Cidr?

Subnet Mask ships an update every 6 months, and Simple Cidr every 30 months. Most recently, Subnet Mask was updated on June 10, 2026 and Simple Cidr on September 8, 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.*