# Dri-Eaz Psychrometric Calc — Psychrometric Calculator > Psychrometric calculator for drying environments, measuring GPP, vapor pressure, and dew point. (iPhone/iPad app by Legend Brands.) - Source: https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596 (this page in markdown: same URL + `.md`) - Developer: [Legend Brands](https://appshunter.io/developer/484266599) - Category: Utilities, Productivity - Price: Free - Rating: 3.58/5 from 12 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 4 MB - Languages: English - Released: 2011-12-05 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596/reviews.md ## What is Dri? Calculate drying environment variables quickly and easily with this all-new psychrometric calculator. Just enter temperature and relative humidity and it will instantly calculate grains per pound (GPP). Or use the Advanced section to calculate vapor pressure and air dew point to material. Switch between F° and C° modes. Features easy-access definitions for all terms. ## Key features - Calculate grains per pound (GPP) - Calculate vapor pressure - Calculate air dew point to material - Switch between F° and C° - Easy-access term definitions ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596/reviews.md ### 4/5 — App couldn’t be Grater *2024-07-24* Today, I downloaded the Dri-Eaz Psychrometric Calculator, and it’s clear that this tool is designed for professionals with a strong technical background. The app provides detailed psychrometric calculations, essential for those in the restoration industry. However, its advanced features and data inputs can be overwhelming for those not familiar with psychrometric charts and concepts. Overall, it’s a specialized and highly technical app best suited for experienced users. ### 5/5 — Lorne McIntyre *2018-07-22, version 2.0* The newly redesigned GPP calculator is a great tool for restorer. ### 3/5 — Crash ...crash ... crash some more *2017-12-05, version 1.0.2* Simple app , that's just fine .. but perhaps update it for latest iOS ### 1/5 — Gpp app *2017-11-24* It seems this app needs updating to ios11.0 it no longer works on either of my iPhones Sure would love to see it updated ### 4/5 — Want more *2013-04-13, version 1.0.2* Love this app, very simple, a little short. How about folders for monitoring progress for example and why not throwing in Sharing while at it!? ### 5/5 — Great *2012-03-31* This is a great app... A lot better than pulling out a grains wheel! ### 3/5 — Grate for finding GPP *2012-01-23* Grate for finding GPP but it would be better if we can use the app to find out the number of air movers and dehumidifiers to use. Otherwise grate app. ### 5/5 — Great tool *2012-01-22* Very simple. A great tool for water damage mitigation. ## Frequently asked questions about Dri ### What are the main functions of Dri-Eaz Psychrometric Calc? Dri-Eaz Psychrometric Calc calculates key drying environment variables such as grains per pound (GPP), vapor pressure, and air dew point to material. It also allows switching between Fahrenheit and Celsius units and provides definitions for its terms. ### How accurate is Dri-Eaz Psychrometric Calc? The app's accuracy is not explicitly detailed, but it is rated 3.6 stars from 12 ratings. Users can input temperature and relative humidity for calculations. ### What devices is Dri-Eaz Psychrometric Calc available on? Dri-Eaz Psychrometric Calc is available on iPhone, iPad, and iPod devices. ### Is Dri-Eaz Psychrometric Calc free to use? Yes, Dri-Eaz Psychrometric Calc is available for free and does not have in-app purchases or advertisements. ### How often is Dri-Eaz Psychrometric Calc updated? The latest version is 2.0.3, and the app was last updated on August 27, 2025. It was initially released on December 5, 2011. ### What is the age rating for Dri-Eaz Psychrometric Calc? Dri-Eaz Psychrometric Calc has an age rating of 4+, making it suitable for a wide range of users. ### Who developed Dri-Eaz Psychrometric Calc? Dri-Eaz Psychrometric Calc was developed by Legend Brands. ## Version history (last 5 releases) ### 2.0.3 — 2025-08-27 Update Footer Links ### 2.0.2 — 2024-08-06 -iOS version updated ### 2.0.1 — 2019-01-23 Minor bug fixes ### 2.0 — 2018-07-17 Redesign ### 1.0.2 — 2011-12-21 Incorporated analysis tools to learn how to better serve the users. ## Apps similar to Dri | App | Rating | Price | Category | | --- | --- | --- | --- | | [Dew Point Humidity Calculator](https://appshunter.io/ios/app/dew-point-humidity-calculator/id6480256120) | 4.6 (52) | Free | Utilities | | [Restoration-OS](https://appshunter.io/ios/app/restoration-os/id6443714896) | 5.0 (1) | Free | Utilities | | [E3 Drying](https://appshunter.io/ios/app/e3-drying/id1513574356) | 5.0 (10) | Free | Utilities | | [Allday HVAC Calc](https://appshunter.io/ios/app/allday-hvac-calc/id6446276144) | 5.0 (1) | Free | Utilities | | [PulseM FieldOps](https://appshunter.io/ios/app/pulsem-fieldops/id1222047384) | 3.3 (12) | Free | Utilities | | [PRO-LAB 24/7](https://appshunter.io/ios/app/pro-lab-247/id1251063238) | 4.9 (74) | Free | Utilities | ## More apps by Legend Brands - [Dri-Eaz Command Center](https://appshunter.io/ios/app/dri-eaz-command-center/id1550550461) - [enviroboss](https://appshunter.io/ios/app/enviroboss/id1571617140) - [Dri-Eaz Command Center Pro](https://appshunter.io/ios/app/dri-eaz-command-center-pro/id1591491354) - [Coleman Dehumidifier](https://appshunter.io/ios/app/coleman-dehumidifier/id1635210605) All apps by Legend Brands: https://appshunter.io/developer/484266599 ## Related topics [sycorp calc](https://appshunter.io/ios/topics/sycorp-calc) · [sycorp](https://appshunter.io/ios/topics/sycorp) · [dew point calculator](https://appshunter.io/ios/topics/dew-point-calculator) · [moisturedensitytool](https://appshunter.io/ios/topics/moisturedensitytool) · [flycarpet psychrometric chart](https://appshunter.io/ios/topics/flycarpet-psychrometric-chart) · [psychrometric chart](https://appshunter.io/ios/topics/psychrometric-chart) --- *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.*