# Subnet Calculator 192 vs VPD Tool

The clearest difference is price: Subnet Calculator 192 at Free against VPD Tool's $0.49. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Subnet Calculator 192 is free to download; VPD Tool costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Subnet Calculator 192 | VPD Tool |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vpd-tool/id6751213834/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Paid |
| Size | 6 MB | 2 MB |
| Requires iOS | **17.6** | 18.5 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alvaro Garcia Pizarro](https://appshunter.io/developer/1822790774) | [Nicholas Hwang](https://appshunter.io/developer/1802240669) |

## What reviewers say

### Subnet Calculator 192

[App page](https://appshunter.io/ios/app/subnet-calculator-192/id6748156871)

**In-app purchases:** none


### VPD Tool

[App page](https://appshunter.io/ios/app/vpd-tool/id6751213834)

This utility app helps growers understand Vapor Pressure Deficit (VPD) for optimal plant growth. It features an interactive heatmap and stage presets to guide environmental adjustments. Calculations are performed on-device for privacy.

**Highlights:** Interactive VPD heatmap, Stage-specific VPD ranges, Leaf and Air VPD calculation, Home and Lock Screen widgets, On-device calculations, CSV log export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Subnet Calculator 192 free?

Subnet Calculator 192 is free to download, with no in-app purchases.

### Is VPD Tool free?

VPD Tool costs $0.49, with no in-app purchases.

### Do Subnet Calculator 192 or VPD Tool have ads?

Neither Subnet Calculator 192 nor VPD Tool shows ads.

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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.*