# VPD Buddy - Grow Diary — Environmental Monitoring > Calculate and visualize VPD for optimal plant growth and yield. (iPhone/iPad app by Budmaster LED Ltd.) - Source: https://appshunter.io/ios/app/vpd-buddy-grow-diary/id1488078381 (this page in markdown: same URL + `.md`) - Developer: [Budmaster LED Ltd](https://appshunter.io/developer/1402486923) - Category: Productivity, Reference - Price: Free - Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 39 MB - Languages: English - Released: 2019-11-15 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/vpd-buddy-grow-diary/id1488078381/reviews.md ## What is VPD Buddy? Calculate multiple VPD values for your grow room and easily visualize them in an easy to read VPD chart as shown on our website here https://www.cropmaster-led.co.uk/vpd-buddy-vpd-chart. Connect to multiple sensors and store data such as (CO2, VOC, Temperature, Humidity, Height, Thermal image, Camera image and VPD in a grow journal as shown on our website here https://www.cropmaster-led.co.uk/environmental-monitoring. Store data in Grow Diaries / Journals Share data to Instagram and Facebook Configure local notifications alert you to problems in your room. Accurately assessing your VPD can be critical in achieving larger and higher quality yields. Achieving a good balanced average VPD is guaranteed to increase your overall yield. Simply enter your room values for temperature and humidity and select a target period such as Bloom or Seedlings to generate an informative chart showing your current VPD and position. Using the chart: If your temperature is too high in bloom for example and you can not lower it it may be that by sliding across the humidity axis on the chart you can raise your humidity levels and get back in the VPD sweet spot. Share and save charts for your projects. Configure ranges. Ability to connect with Thingy Bluetooth devices Added Sensor monitoring and display for a wide variety of sensors Added demo data section to preview products Added ability to store grow journal information Added local notifications ## Key features - VPD calculation and charting - Connect to multiple sensors - Store data in grow journals - Local notification alerts - Share data to social media - Configure custom ranges ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/vpd-buddy-grow-diary/id1488078381/reviews.md ### 1/5 — Black on black in dark mode. *2019-11-26, version 1.1* Can’t see text with iPhone in dark mode. Black text on black background. **Developer response:** Fixed that,thanks for spotting it👍 ## Frequently asked questions about VPD Buddy ### What is VPD Buddy used for? VPD Buddy is used to calculate and visualize Vapor Pressure Deficit (VPD) for your grow room. This helps growers optimize environmental conditions like temperature and humidity to achieve better plant growth and higher yields. ### Can VPD Buddy connect to sensors? Yes, VPD Buddy can connect to multiple sensors, including those for CO2, VOC, Temperature, Humidity, and can store data from thermal and camera images. It also has the ability to connect with Thingy Bluetooth devices. ### Does VPD Buddy offer alerts? Yes, VPD Buddy can configure local notifications to alert you to potential problems in your grow room, helping you to proactively manage your environment. ### How does VPD Buddy help improve yield? By accurately assessing and maintaining an optimal VPD, VPD Buddy helps growers achieve larger and higher quality yields. The app's charting feature assists in finding the 'VPD sweet spot' by adjusting humidity based on temperature. ### Can I save and share my data with VPD Buddy? Yes, you can share data to platforms like Instagram and Facebook, and also save charts for your projects. The app allows you to store grow journal information and data. ### What devices is VPD Buddy compatible with? VPD Buddy is compatible with iPhone, iPad, and iPod devices, as indicated by its supported devices list. ### How often is VPD Buddy updated? The latest version of VPD Buddy is 8.2, which was last updated on July 15, 2021. This indicates a release and update frequency that has been at least annual. ### What is the user rating for VPD Buddy? VPD Buddy currently has a user rating of 1.0 stars based on 1 rating. This suggests a very limited number of user reviews available. ## Version history (last 1 release) ### 8.2 — 2021-07-15 General Enhancements ## Apps similar to VPD Buddy | App | Rating | Price | Category | | --- | --- | --- | --- | | [Habit Tracker with Widget](https://appshunter.io/ios/app/habit-tracker-with-widget/id1440005368) | 4.7 (119) | Free | Productivity | | [UP Deck](https://appshunter.io/ios/app/up-deck/id1367176672) | 4.6 (10) | Free | Productivity | | [M&P Pressure Vessels](https://appshunter.io/ios/app/m-and-p-pressure-vessels/id1240098431) | — | Free | Productivity | | [Task Manager: Daily To-Do](https://appshunter.io/ios/app/task-manager-daily-to-do/id1371281013) | 5.0 (1) | Free | Productivity | | [Agri-Tech](https://appshunter.io/ios/app/agri-tech/id1491962254) | — | Free | Productivity | | [Cannavigia](https://appshunter.io/ios/app/cannavigia/id1526842777) | — | Free | Productivity | ## More apps by Budmaster LED Ltd - [Budbox](https://appshunter.io/ios/app/budbox/id1442609533) - [GrowLight](https://appshunter.io/ios/app/growlight/id1451615693) - [Mills Nutrient Calculator](https://appshunter.io/ios/app/mills-nutrient-calculator/id1467729839) - [Snoops Nutrient Calculator](https://appshunter.io/ios/app/snoops-nutrient-calculator/id1475253746) - [AutoPot](https://appshunter.io/ios/app/autopot/id1475770911) - [GrowRoom](https://appshunter.io/ios/app/growroom/id1480516971) All apps by Budmaster LED Ltd: https://appshunter.io/developer/1402486923 --- *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 2026-06-10.*