# GDU Calculator > Calculate crop Growing Degree Units for corn and wheat, with notifications. (iPhone/iPad app by IFA Productions Inc..) - Source: https://appshunter.io/ios/app/gdu-calculator/id850528308 (this page in markdown: same URL + `.md`) - Developer: [IFA Productions Inc.](https://appshunter.io/developer/520210329) - Category: Business, Reference - Price: Free - Rating: 2.50/5 from 11 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 57 MB - Languages: American English - Released: 2014-04-29 - Data updated: 2026-06-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gdu-calculator/id850528308/reviews.md ## What is GDU Calculator? The Ag PhD GDU Calculator is a reference for corn and wheat growers to determine the amount of Growing Degree Units for their crops in the current crop season. Includes day-by-day breakdown of temperature and GDU data and has the option for push notifications informing growers of potential problems in their fields based on their crop growth stage, as calculated by the crop GDU from planting date. ## Key features - Growing Degree Unit calculation - Corn and wheat crop support - Day-by-day temperature data - Push notifications for field issues - Crop growth stage tracking ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/gdu-calculator/id850528308/reviews.md ### 1/5 — Instantly Crashes *2022-09-08* Crashes after tapping on field name. App is great when it works. **Developer response:** We apologize for the issues you're having. Please try deleting and re-installing the app to see if this resolves the problem. If you continue to have problems, please reach out to us at info@agphd.com. ### 5/5 — PGR calculator *2021-06-12* Works for calculating GDD to time PGR apps for turfgrass. I am shooting for .125oz/1k sqft every 300 GDD on 1/2” zenith zoysia. This app makes it easy to know when to reapply. ### 2/5 — Ok *2020-08-20* I like the features of the app, but to make it great I’d like to see a five year average of GDU’s and a +/- from this year and also a +/- from last year to really know how the year is stacking up. ### 1/5 — Doesn’t work properly *2020-04-26* This app does not configure to you screen!! So when you enter info you can barely hit the done button. Then went to edit some info and you can’t even see the done button and can’t scroll down either. BAD app **Developer response:** We apologize for this error and are currently working to issue a fix ASAP. You should be receiving the update any day now. Thanks, Ag PhD Edit #1: Update to the app has been submitted to the App Store for review. Fix should be deployed within 24-48 hours. Edit #2 (04-29-20): Update is now live in the App Store. Please let us know if your issue has been resolved. ## Frequently asked questions about GDU Calculator ### What is GDU Calculator used for? GDU Calculator helps corn and wheat growers determine the amount of Growing Degree Units for their crops throughout the current season. It tracks daily temperature and GDU data to monitor crop development. ### Does GDU Calculator have ads? No, GDU Calculator is ad-free, allowing for an uninterrupted user experience focused on crop management data. ### What devices does GDU Calculator support? GDU Calculator is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users. ### How often is GDU Calculator updated? The app was last updated on November 26, 2024, with version 1.6.0. This indicates ongoing support and potential for future improvements. ### What is the age rating for GDU Calculator? GDU Calculator has an age rating of 4+, making it suitable for a broad audience including younger users interested in agriculture. ### Can GDU Calculator notify me about potential field problems? Yes, GDU Calculator offers push notifications that can inform growers of potential problems in their fields based on their crop growth stage, as calculated by GDU data from the planting date. ### What is the user rating for GDU Calculator? GDU Calculator has a rating of 2.5 stars based on 11 ratings. This suggests mixed user sentiment, with potential areas for improvement. ### Is GDU Calculator free to use? Yes, GDU Calculator is available for free, meaning growers can access its features without any purchase cost. ## Version history (last 5 releases) ### 1.6.0 — 2024-11-26 Bug Fixes: Resolved minor issues to enhance reliability. Performance Improvements: Enjoy a faster and smoother app experience.or bug fix!App performance improvement. ### 1.5.9 — 2024-11-20 We've resolved an issue that caused the app to crash for some users. Thank you for your patience and feedback! ### 1.5.8 — 2022-08-26 We have added a local storage of data for fast calculations and better user experience. Minor bug fixing. ### 1.5.7.1 — 2022-08-18 The app is stuck with a loading indicator when choosing the current day as the planted date. - Fixed Please share your reviews. ### 1.5.7 — 2022-08-18 fixed an crash for year earlier then 2012. ## Apps similar to GDU Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Granular Insights Classic](https://appshunter.io/ios/app/granular-insights-classic/id1447163449) | 3.9 (48) | Free | Business | | [Taranis mobile](https://appshunter.io/ios/app/taranis-mobile/id1536572923) | 5.0 (2) | Free | Business | | [FieldAlytics Mobile](https://appshunter.io/ios/app/fieldalytics-mobile/id1151565425) | 4.0 (31) | Free | Business | | [Stine Seed](https://appshunter.io/ios/app/stine-seed/id1565023144) | — | Free | Business | | [ADM Fertilizer](https://appshunter.io/ios/app/adm-fertilizer/id1536731455) | 4.5 (8) | Free | Business | | [FS Yield Estimator](https://appshunter.io/ios/app/fs-yield-estimator/id999053779) | 3.0 (5) | Free | Business | ## More apps by IFA Productions Inc. - [Fertilizer Removal by Crop](https://appshunter.io/ios/app/fertilizer-removal-by-crop/id520209986) - [Ag PhD Field Guide](https://appshunter.io/ios/app/ag-phd-field-guide/id545427305) - [Planting Population Calculator](https://appshunter.io/ios/app/planting-population-calculator/id555293516) - [Harvest Loss Calculator](https://appshunter.io/ios/app/harvest-loss-calculator/id555296106) - [Drainage Tile Calculator](https://appshunter.io/ios/app/drainage-tile-calculator/id584976425) - [Nutrient Deficiencies by Crop](https://appshunter.io/ios/app/nutrient-deficiencies-by-crop/id847529160) All apps by IFA Productions Inc.: https://appshunter.io/developer/520210329 ## Related topics [gdu calculator](https://appshunter.io/ios/topics/gdu-calculator) · [agphd](https://appshunter.io/ios/topics/agphd) · [ag phd](https://appshunter.io/ios/topics/ag-phd) --- *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 2026-06-04.*