# Subnet Mask Wheel vs Simple Cidr

The clearest difference is in-app purchases: Simple Cidr at none against Subnet Mask Wheel's 1. Simple Cidr also leads on ads (none vs shown) and iOS requirement (17.6 vs 26.0). Subnet Mask Wheel's advantage is update cadence (every 5 months vs every 30 months). On price and device support there is nothing between them.

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

Subnet Mask Wheel ships an update every 5 months, Simple Cidr every 30 months. The most recent releases landed on July 6, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Subnet Mask Wheel | Simple Cidr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/subnet-mask-wheel/id560947458/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 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 Wheel

[App page](https://appshunter.io/ios/app/subnet-mask-wheel/id560947458)

Easily convert subnet masks between decimal, binary, and CIDR notation. Quickly see the number of available host addresses for any given mask. Input masks using a picker, slider, or prefix length buttons.

**Highlights:** Decimal subnet mask display, Binary subnet mask display, CIDR notation display, Host address count, Input via picker, slider, or buttons

**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 Wheel free?

Subnet Mask Wheel 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 Wheel or Simple Cidr have ads?

Subnet Mask Wheel shows ads; Simple Cidr does not.

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

Subnet Mask Wheel ships an update every 5 months, and Simple Cidr every 30 months. Most recently, Subnet Mask Wheel was updated on July 6, 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.*