# GDDTracker — Growing Degree Day Calculator > Precision lawn care companion for timing applications and managing records. (iPhone/iPad app by Kirk Faris.) - Source: https://appshunter.io/ios/app/gddtracker/id6752981800 (this page in markdown: same URL + `.md`) - Developer: [Kirk Faris](https://appshunter.io/developer/1842027731) - Category: Weather, Utilities - Price: Free with in-app purchases - Rating: 4.60/5 from 10 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 15 MB - Languages: American English - Released: 2026-03-15 - Data updated: 2026-08-25 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/gddtracker/id6752981800/reviews.md ## What is GDDTracker? GDD Tracker is the complete lawn care companion for homeowners and pros who want precision timing and organized records. Using your location and hyper-local weather data, the app calculates Growing Degree Days (GDD) so you know exactly when to apply pre-emergents, post-emergents, plant growth regulators, fertilizers, and more. But GDD Tracker goes beyond just tracking — it's a full-featured lawn management tool. GDD Tracking & Forecasting • Accurate GDD calculations based on your location and daily temps • Forecasted date to hit your target threshold • Clear progress with percentage, badge, and cumulative/daily charts • No-spray advisories for high wind, heat, or rain Application Log • Log every application — PGR, fertilizer, weed control, fungicide, insecticide, and more • Track products, rates, and notes for each entry • View season history with year-over-year comparisons • Export your records as CSV or PDF Smart Reminders • Get notified when it's time to reapply • Set reminders by GDD accumulation, calendar days, or soil temperature • Early warning alerts as you approach your threshold Built for Your Lawn • 50+ grass variety profiles — Bermuda, Zoysia, Fescue, Bluegrass, and more • Rate calculator for exact product amounts based on lawn size • Soil temperature estimates for pre-emergent and seeding timing • Manage multiple lawns with separate locations, settings, and color tags Everywhere You Need It • Widgets for your Home Screen • Apple Watch app for a quick glance • iCloud sync across all your devices • Optional device location or locked "home" coordinates Privacy-First No ads. No data selling. Location is used only to fetch local weather. iCloud sync is optional. How it works: 1. Add your lawn and choose your grass type or set a custom threshold. 2. Set your start date (e.g., last application). 3. Track daily progress as GDD accumulates. 4. Log applications and get notified when it's time to reapply. Perfect for: • Homeowners aiming for a healthier, weed-free lawn • DIY lawn enthusiasts who want precision timing • Lawn care pros who manage multiple properties and schedules Subscription Information GDD Tracker Pro is required to access all features. Two auto-renewing subscription options are available: • Monthly: $0.99/month • Annual: $9.99/year The annual plan includes a 7-day free trial. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Privacy Policy: https://gdd-tracker.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Download GDD Tracker and take the guesswork out of lawn care. ## Key features - Growing Degree Day (GDD) calculation and forecasting - Application logging with product details and notes - Smart reminders based on GDD, days, or soil temp - 50+ grass variety profiles - Rate calculator for product amounts - Multiple lawn management - CSV/PDF record export ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly | $0.99 | per month | | Annual | $9.99 | per year | ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/gddtracker/id6752981800/reviews.md ### 5/5 — My grass is so juicy *2026-06-22* OMG!!! My grass is so green and Lucious. Just learned that word today! Love how this app tracks my grass. YIPEEEEE! ### 5/5 — AMAZING *2026-06-17* Honest review, I’ve tried other apps that are suppose to do what this app does and they don’t work nearly as good as this one! **Developer response:** Thank you so much! I am glad to finally provide a much needed app to the lawn care community. Please send us an email if there are any features you think would be useful! ### 5/5 — Love this! *2026-06-12* Awesome tool for a new home owner who wants a beautiful lawn. ### 5/5 — Just what we needed *2026-05-20* Great app! ### 5/5 — Finally *2026-03-19* Finally an easy to use app that actually works for us lawn nerds!! **Developer response:** Thank you so much! I am glad to finally provide a much needed app to the lawn care community. Please send us an email if there are any features you think would be useful! ## Frequently asked questions about GDDTracker ### What is GDDTracker used for? GDDTracker is used to calculate Growing Degree Days (GDD) based on your location and hyper-local weather data. This helps you precisely time lawn care applications like pre-emergents, fertilizers, and more. ### How does GDDTracker calculate GDD? GDDTracker calculates GDD using your location to fetch daily temperature data. It then applies a chosen formula to determine the accumulated degree days, helping you forecast when to reach specific thresholds. ### Can GDDTracker help me remember when to reapply treatments? Yes, GDDTracker offers smart reminders. You can set notifications based on GDD accumulation, calendar days, or soil temperature, and receive early warning alerts as you approach your application thresholds. ### What kind of lawn care information can I log in GDDTracker? You can log every application, including PGRs, fertilizers, weed control, fungicides, and insecticides. The app allows you to track products used, application rates, and add specific notes for each entry. ### Does GDDTracker support multiple lawns? Yes, GDDTracker is built to manage multiple lawns. You can set up separate locations, customize settings, and use color tags for each lawn, making it ideal for professionals or those with diverse properties. ### What are the subscription options for GDDTracker Pro? GDDTracker Pro offers two auto-renewing subscription options: a monthly plan for $0.99/month and an annual plan for $9.99/year. The annual plan includes a 7-day free trial. ### How do I cancel my GDDTracker subscription? You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Subscriptions must be canceled at least 24 hours before the end of the current period to avoid renewal. ### Is GDDTracker available on Apple Watch? Yes, GDDTracker has an Apple Watch app, allowing you to get a quick glance at your lawn care information directly from your wrist. ## Version history (last 5 releases) ### 2.3 — 2026-06-18 What's new in this version: • Lawn Area Map Tool — measure your lawn right on a satellite map. Drop points, drag to fine-tune, or pan a precision crosshair to place exact corners. Tap any point to move or delete it. • Season Total GDD — track year-to-date growing degree days alongside your current cycle. Perfect for cross-referencing pest and insect timing from university IPM reports. Start date is fully customizable (Jan 1, Mar 1, Apr 1, or pick your own). • Rainfall Tracker — see today's total and the past 7 days at a glance, so you know when to water and when to skip. • Flexible Units — switch product application rates between ounces and pounds, and lawn area between square feet and acres. Pick what makes sense for your yard or your product label. All new dashboard cards can be toggled on or off from Settings → Dashboard. Thanks for using GDD Tracker! Have feedback or a feature request? Tap Settings → Request a Feature. ### 2.2.3 — 2026-05-18 What's New • Weather History by Month — The full weather history view now lets you filter by month with a scrollable month picker, plus a summary showing total days and GDD for each month. • Recurring Application Reminders — Set any reminder to repeat automatically. When you log an application that fulfills a recurring reminder, the next one is created for you. Days-based reminders reset from your actual application date, so early or late logging adjusts naturally. PGR applications default to recurring. Bug Fixes • Fixed notifications from deleted lawns — Deleting a lawn now properly cancels all its pending notifications (GDD cycle, spray advisory, pre-emergent, and reapply reminders) and cleans up stored notification state. No more phantom alerts. ### 2.2.2 — 2026-04-20 Version 2.2.2 • Fixed a critical bug the sent users back to the paywall after force closing and reopening the app, even with a valid subscription. Huge New Features in V2.2! • Fresh Design — New emerald theme, redesigned dashboard, and floating tab bar • Full Application Tracking — Log fertilizer, PGR, pre-emergent, post-emergent, insect control, fungicide, and soil amendments • 50+ Grass Profiles — Select your exact variety (Tahoma 31, TifTuf, Tifway 419 & more) with recommended GDD thresholds built in • Smart Reapply Reminders — Get alerts based on GDD accumulation, days elapsed, or soil temperature • °F / °C Support — Choose your preferred temperature unit during setup • Redesigned My Plan — Color-coded task cards with skip and reapply actions • Soil Temp Estimates — Know when to apply pre-emergent and seed • Rate Calculator — Exact product amounts for any lawn size ### 2.2.1 — 2026-04-17 Version 2.2.1 • Minor Bug Fixes Huge New Features in V2.2! • Fresh Design — New emerald theme, redesigned dashboard, and floating tab bar • Full Application Tracking — Log fertilizer, PGR, pre-emergent, post-emergent, insect control, fungicide, and soil amendments • 50+ Grass Profiles — Select your exact variety (Tahoma 31, TifTuf, Tifway 419 & more) with recommended GDD thresholds built in • Smart Reapply Reminders — Get alerts based on GDD accumulation, days elapsed, or soil temperature • °F / °C Support — Choose your preferred temperature unit during setup • Redesigned My Plan — Color-coded task cards with skip and reapply actions • Soil Temp Estimates — Know when to apply pre-emergent and seed • Rate Calculator — Exact product amounts for any lawn size ### 2.2 — 2026-04-16 Huge New Features in V2.2! • Fresh Design — New emerald theme, redesigned dashboard, and floating tab bar • Full Application Tracking — Log fertilizer, PGR, pre-emergent, post-emergent, insect control, fungicide, and soil amendments • 50+ Grass Profiles — Select your exact variety (Tahoma 31, TifTuf, Tifway 419 & more) with recommended GDD thresholds built in • Smart Reapply Reminders — Get alerts based on GDD accumulation, days elapsed, or soil temperature • °F / °C Support — Choose your preferred temperature unit during setup • Redesigned My Plan — Color-coded task cards with skip and reapply actions • Soil Temp Estimates — Know when to apply pre-emergent and seed • Rate Calculator — Exact product amounts for any lawn size --- *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 2026-08-25.*