# IP Calcpad vs VLSM | Subnet

The clearest difference is ads: VLSM | Subnet at none against IP Calcpad's shown. IP Calcpad's advantage is update cadence (every 3 months vs every 9 months) and iOS requirement (12.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IP Calcpad ships an update every 3 months, VLSM | Subnet every 9 months. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | IP Calcpad | VLSM | Subnet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 9 months |
| Size | 42 MB | 23 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tadayoshi Fujiki](https://appshunter.io/developer/401633010) | [Edwin Mejia](https://appshunter.io/developer/1620400021) |

## What reviewers say

### IP Calcpad

[App page](https://appshunter.io/ios/app/ip-calcpad/id1610436312)

**Features:** macOS Compatibility

**In-app purchases:** none


### VLSM | Subnet

[App page](https://appshunter.io/ios/app/vlsm-subnet/id6504495906)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IP Calcpad free?

IP Calcpad is free to download, with no in-app purchases.

### Is VLSM | Subnet free?

VLSM | Subnet is free to download, with no in-app purchases.

### Do IP Calcpad or VLSM | Subnet have ads?

IP Calcpad shows ads; VLSM | Subnet does not.

### Which is updated more often, IP Calcpad or VLSM | Subnet?

IP Calcpad ships an update every 3 months, and VLSM | Subnet every 9 months. Most recently, IP Calcpad was updated on October 19, 2026 and VLSM | Subnet on October 17, 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.*