# Dr. Greenhouse VPD Calculator — Calculate your VPD > Calculate and interpret Vapor Pressure Deficit for plant cultivation. (iPhone/iPad app by Dr Greenhouse Inc.) - Source: https://appshunter.io/ios/app/dr-greenhouse-vpd-calculator/id1616781331 (this page in markdown: same URL + `.md`) - Developer: [Dr Greenhouse Inc](https://appshunter.io/developer/1616781333) - Category: Productivity - Price: Free - Rating: 5.00/5 from 6 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 15 MB - Languages: English - Released: 2022-05-02 - Data updated: 2026-07-26 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/dr-greenhouse-vpd-calculator/id1616781331/reviews.md ## What is Dr. Greenhouse VPD Calculator? Welcome to the Dr. Greenhouse VPD App! With this tool, you can easily calculate the Vapor Pressure Deficit of your grow room’s air. First, choose your temperature units: Fahrenheit or Celsius. Then plug in the air temperature and relative humidity and click “Calculate.” The resulting VPD (kPa) will be color-coded to indicate whether the grow room climate is humid (blue), vegetative (green), reproductive (yellow), or dry (purple). The desired VPD depends on the type of plant, its stage of growth, and, in some cases, the time of day. In general, leafy greens, microgreens, and other non-flowering plants enjoy a “vegetative” environment. Flowering and fruiting plants benefit from a “reproductive” environment. Cannabis plants may yield more trichomes and terpenes, if exposed to a “dry” and water-stressed environment in the days leading up to harvest. And a “humid” nighttime environment can improve translocation of nutrients and metabolites to strawberries and other fruiting plants. ## Key features - VPD calculation - Temperature unit selection (Fahrenheit/Celsius) - Color-coded climate indicators - Supports plant growth stages - Supports different plant types ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/dr-greenhouse-vpd-calculator/id1616781331/reviews.md ### 5/5 — Best Ever *2025-12-06* As a new cannabis grower this app is a dog send. Thank you!!! Telling everyone I can. ### 5/5 — Best Calculator in the App Store *2023-10-06* If all you need to know, is a simple calculation of your VPD this app is perfect! It has an easy switch to calculate Fahrenheit and Celsius so there’s no need to guess and, it also tells you the best VPD limits for each stage of your plants that actually lines up with everything that I’ve ever seen online ### 5/5 — Great indoor farming calculator *2022-09-15, version 1.0* Easy to use on the fly, and I like that it has charts for different crops. ### 5/5 — Great indoor farming calculator *2022-09-15* Easy to use on the fly, and I like that it has charts for different crops. ### 5/5 — Easy to use and make changes *2022-07-05* The VPD app is great for on the fly / in the field calcs to ensure I have the best environment for plant growth. So long paper chart! ## Frequently asked questions about Dr. Greenhouse VPD Calculator ### How does Dr. Greenhouse VPD Calculator help with plant growth? Dr. Greenhouse VPD Calculator helps by providing a color-coded indication of your grow room's climate, allowing you to adjust temperature and humidity to create optimal conditions for different plant types and growth stages, potentially improving yield and plant health. ### What units does Dr. Greenhouse VPD Calculator support? Dr. Greenhouse VPD Calculator supports both Fahrenheit and Celsius for temperature input, offering flexibility for users regardless of their preferred measurement system. ### Is Dr. Greenhouse VPD Calculator available on Android? Based on the provided data, Dr. Greenhouse VPD Calculator is available on iPhone and iPad. Information regarding Android compatibility is not specified. ### How often is Dr. Greenhouse VPD Calculator updated? Dr. Greenhouse VPD Calculator was last updated on May 2, 2023, with version 2.0. This indicates a recent update, suggesting ongoing development and support. ### What is the age rating for Dr. Greenhouse VPD Calculator? Dr. Greenhouse VPD Calculator has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in plant care. ### Does Dr. Greenhouse VPD Calculator have ads? No, Dr. Greenhouse VPD Calculator does not contain advertisements. It is a free application without any ad interruptions. ### What is the user sentiment for Dr. Greenhouse VPD Calculator? Dr. Greenhouse VPD Calculator has received overwhelmingly positive user sentiment, evidenced by its perfect rating of 5.0 stars from 6 ratings. ### Can Dr. Greenhouse VPD Calculator be used for commercial growing? Yes, the app's ability to precisely calculate VPD and provide color-coded climate indicators makes it a valuable tool for optimizing conditions in commercial growing environments. ## Version history (last 2 releases) ### 2.0 — 2023-05-02 Version 2.0 of the VPD Calculator includes the following changes and new features: - Improved user interface - New leaf temperature - based VPD calculator - New RH calculator based on target VPD ### 1.0 — 2022-05-02 No release notes. ## Apps similar to Dr. Greenhouse VPD Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [BudLabs](https://appshunter.io/ios/app/budlabs/id1174388506) | 3.2 (77) | Free | Productivity | | [AROYA](https://appshunter.io/ios/app/aroya/id1486621692) | 3.7 (28) | Free | Productivity | | [Edenic](https://appshunter.io/ios/app/edenic/id1614720652) | 1.6 (32) | Free | Productivity | | [Growlink](https://appshunter.io/ios/app/growlink/id1108096591) | 1.8 (5) | Free | Productivity | | [SuperGreenLab - Grow Assistant](https://appshunter.io/ios/app/supergreenlab-grow-assistant/id1502232318) | 3.9 (19) | Free | Productivity | | [Hempie - AI Growing Companion](https://appshunter.io/ios/app/hempie-ai-growing-companion/id6743956483) | — | Free | Productivity | ## Related topics [vpd calculator](https://appshunter.io/ios/topics/vpd-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 2026-07-26.*