# Extinguisher360 vs VPD Tool

The clearest difference is price: Extinguisher360 at Free against VPD Tool's $0.49. Extinguisher360 also leads on ratings volume (3 vs 1) and iOS requirement (15.6 vs 18.5). On rating, review sentiment, update cadence and ads there is nothing between them.

Extinguisher360 is free to download; VPD Tool costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Extinguisher360 against 5.0 for VPD Tool. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Extinguisher360 ships an update every 4 months, VPD Tool every 2 months. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Extinguisher360 | VPD Tool |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/extinguisher360/id6462470501/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/vpd-tool/id6751213834/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 52 MB | 2 MB |
| Requires iOS | **15.6** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Extinguisher 360 Inc](https://appshunter.io/developer/1703078539) | [Nicholas Hwang](https://appshunter.io/developer/1802240669) |

## What reviewers say

### Extinguisher360

[App page](https://appshunter.io/ios/app/extinguisher360/id6462470501)

Streamline fire extinguisher inspections with this intuitive app. It simplifies compliance with NFPA 10 requirements through QR code scanning and detailed digital forms, making safety management accessible to everyone.

**Highlights:** Simplified inspections without special qualifications, QR code scanning for automated inspections, User-friendly interface for registration and inventory, Detailed inspection and maintenance forms, Instant report generation for record-keeping, Enhanced safety and credibility

**Features:** macOS Compatibility

**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 Extinguisher360 free?

Extinguisher360 is free to download, with no in-app purchases.

### Is VPD Tool free?

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

### Which has better reviews, Extinguisher360 or VPD Tool?

Extinguisher360 and VPD Tool are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do Extinguisher360 or VPD Tool have ads?

Neither Extinguisher360 nor VPD Tool shows ads.

### Which is updated more often, Extinguisher360 or VPD Tool?

Extinguisher360 ships an update every 4 months, and VPD Tool every 2 months. Most recently, Extinguisher360 was updated on October 21, 2026 and VPD Tool on October 18, 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.*