# VPD Vapor Pressure Calculator — Dial In Your Grow Environment

> Calculate Vapor Pressure Deficit for optimal plant growth and yield. (iPhone/iPad app by harry bloch.)

- Source: https://appshunter.io/ios/app/vpd-vapor-pressure-calculator/id1586028655 (this page in markdown: same URL + `.md`)
- Developer: [harry bloch](https://appshunter.io/developer/1130009832)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 2.56/5 from 9 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 20 MB
- Languages: English
- Released: 2022-06-17
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/vpd-vapor-pressure-calculator/id1586028655/reviews.md

## What is VPD Vapor Pressure Calculator?

Maximize Your Plant’s Growth Potential with VPD Calculation!

Are you looking to optimize your grow environment and achieve bigger, healthier plants? With this easy-to-use app, you can calculate your Vapor Pressure Deficit (VPD) to ensure the perfect balance between moisture in the air and your plants' needs, ultimately maximizing your yield. Whether you’re growing tomatoes, herbs, flowers, or any other plants, understanding and controlling VPD is critical for optimal growth.

VPD, or Vapor Pressure Deficit, measures the difference between the current amount of moisture in the air and the maximum moisture the air can hold at saturation. By keeping track of this key parameter, you can create the ideal environment for plant health, reducing the risk of problems such as rot, dehydration, and stress.

This app will guide you through regulating your grow room conditions and adjusting humidity, temperature, and other environmental factors for hydroponic systems, no-till farming, and organic gardening. By following algorithmic suggestions tailored to your specific conditions, you can rest assured that your growing methods will always be efficient and high-yielding.

Whether you’re a seasoned gardener or a beginner, understanding the effects of VPD on your plants is essential for maintaining healthy, thriving crops. Grow giant tomatoes and enjoy bountiful harvests by ensuring that your greenhouse or indoor grow space is always in optimal conditions.

VPD in Greenhouses:
In greenhouse environments, controlling VPD is vital for preventing moisture buildup on your plants’ leaves. A film of water on a plant can lead to fungal infections and rot. In contrast, high VPD levels can lead to dehydration, stressing the plants and potentially killing cuttings. This app helps you strike the perfect balance for plant health and growth.

Start growing smarter today by calculating your VPD and fine-tuning your environment. Maximize your crop yield, grow bigger tomatoes, and elevate your gardening game!

Terms of Use: https://harryfbloch.wixsite.com/mysite/vpd-terms

Privacy Policy: https://harryfbloch.wixsite.com/mysite/vpd-privacy

EULA Agreement: https://apple.com/legal/internet-services/itunes/dev/stdeula

## Key features

- VPD calculation for plant growth
- Optimize grow environment
- Maximize plant yield
- Guidance on humidity and temperature
- Suitable for hydroponics and organic gardening
- Algorithmic suggestions for conditions

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| VPD Premium | $9.99 | one-time |


## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/vpd-vapor-pressure-calculator/id1586028655/reviews.md

### 2/5 — Bo Celsius

*2024-04-09, version 1.4*

Temperatures are in Fahrenheit

### 1/5 — good idea but pointless in the greenhouse

*2024-02-14*

i can't see any way to add leaf temps which makes calculating vpd pretty worthless for growing plants

### 1/5 — No ad removal

*2024-02-06, version 1.4*

Each & every time you calculate your VPD u have to deal with an ad running,,,,,, waaaaa

I guess that’s better than giving $ for ad removal & ads Not being removed.

### 3/5 — Ist ok wer umrechnen mag

*2023-11-12, version 1.4*

Leider nicht in grad celsius

### 1/5 — Whack!!

*2023-10-29, version 1.4*

This calculator is definitely broken.

### 2/5 — Is this science? No.

*2022-12-13*

Science is done in Celsius, this is in Fahrenheit first of all with no option to change it. Secondly , adds on a simple calculator that I can find online , free, and it’s in Celsius ….

## Frequently asked questions about VPD Vapor Pressure Calculator

### What is VPD Vapor Pressure Calculator used for?

VPD Vapor Pressure Calculator is used to calculate Vapor Pressure Deficit (VPD), a key metric for optimizing plant growth environments. It helps users balance air moisture and plant needs to maximize yield and plant health.

### Is VPD Vapor Pressure Calculator free to use?

Yes, VPD Vapor Pressure Calculator is free to download and use. It also offers in-app purchases for additional features or content.

### Does VPD Vapor Pressure Calculator have ads?

Yes, VPD Vapor Pressure Calculator contains advertisements. Users may encounter ads while using the application.

### What devices does VPD Vapor Pressure Calculator support?

VPD Vapor Pressure Calculator is supported on iPhone, iPad, and iPod devices. It is designed for iOS users.

### How often is VPD Vapor Pressure Calculator updated?

The latest version of VPD Vapor Pressure Calculator is 1.5.2, last updated on March 11, 2025. Updates typically occur to improve functionality and add new features.

### What is the age rating for VPD Vapor Pressure Calculator?

VPD Vapor Pressure Calculator has an age rating of 4+. This indicates it is suitable for users aged four and older.

### What are the terms of use and privacy policy for VPD Vapor Pressure Calculator?

The terms of use and privacy policy for VPD Vapor Pressure Calculator can be found on the developer's website. Links are provided within the app's store listing or settings.

### What is the user sentiment for VPD Vapor Pressure Calculator based on ratings?

VPD Vapor Pressure Calculator has a rating of 2.6 stars from 9 ratings. This suggests a mixed to negative user sentiment based on current reviews.

## Version history (last 5 releases)

### 1.5.2 — 2025-03-11

-bug fixes and stability improvments
-added affilate links instead of google ads

### 1.5.1 — 2024-04-29

Stability Improvements & Bug Fixes
Add support for Celsius and custom leaf def

### 1.5 — 2024-04-23

minor bug fixes

### 1.4 — 2023-05-16

add the ability to remove ads

### 1.3.9 — 2023-03-29

Fix Bug Causing Results not to load

## Apps similar to VPD Vapor Pressure Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Photone - Grow Light Meter](https://appshunter.io/ios/app/photone-grow-light-meter/id1450079523) | 4.6 (4,851) | Free | Utilities |
| [Grow Calc: Plant Light Meter](https://appshunter.io/ios/app/grow-calc-plant-light-meter/id6751297015) | — | Free | Utilities |
| [Concrete Evap](https://appshunter.io/ios/app/concrete-evap/id6743004622) | 5.0 (1) | Free | Utilities |
| [Spider Farmer](https://appshunter.io/ios/app/spider-farmer/id6476436750) | 3.0 (99) | Free | Utilities |
| [PPFD METER - Grow Light Meter](https://appshunter.io/ios/app/ppfd-meter-grow-light-meter/id6479329051) | 4.7 (87) | Free | Utilities |
| [VIVOSUN](https://appshunter.io/ios/app/vivosun/id1600813756) | 4.7 (7,705) | Free | Utilities |

## More apps by harry bloch

- [Habit Mentor - Self Discipline](https://appshunter.io/ios/app/habit-mentor-self-discipline/id1525635596)
- [Wellness Meditation Journal](https://appshunter.io/ios/app/wellness-meditation-journal/id1526686931)
- [Purple Noise Fan Train Sounds](https://appshunter.io/ios/app/purple-noise-fan-train-sounds/id1633061452)
- [Plant Water Tracker Garden Dad](https://appshunter.io/ios/app/plant-water-tracker-garden-dad/id1669342722)
- [Fish Tank Buddy](https://appshunter.io/ios/app/fish-tank-buddy/id6446954175)

All apps by harry bloch: https://appshunter.io/developer/1130009832

## Related topics

[vpd vapor pressure calculator](https://appshunter.io/ios/topics/vpd-vapor-pressure-calculator)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*