# Subnet Mask vs LdM 50 Years!

The clearest difference is in-app purchases: LdM 50 Years! at none against Subnet Mask's 1. LdM 50 Years! also leads on ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Subnet Mask sells 1 one-off in-app purchase. LdM 50 Years! asks for nothing beyond the download.

## The numbers

| Metric | Subnet Mask | LdM 50 Years! |
| --- | --- | --- |
| 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 | — |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 52 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Furuya](https://appshunter.io/developer/503779747) | [PSTM SRL](https://appshunter.io/developer/1449013006) |

## 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 |


### LdM 50 Years!

[App page](https://appshunter.io/ios/app/ldm-50-years/id6471869104)

**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 LdM 50 Years! free?

LdM 50 Years! is free to download, with no in-app purchases.

### Do Subnet Mask or LdM 50 Years! have ads?

Subnet Mask shows ads; LdM 50 Years! does not.

---

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