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GDDTracker

GDDTracker

Growing Degree Day Calculator

9 ratings
5 reviews
🔧 Utilities
☀️ Weather
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 15, 2026
  • June 18, 2026

Features

Developer

Kirk Faris
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🧾$0.99 - $9.99
In-App Purchase↘︎
⭐5
Reviews↘︎
❓8 answered
FAQ↘︎
📦~ in 2 days
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About

This app calculates Growing Degree Days (GDD) using hyper-local weather data to help you precisely time lawn care applications. It also logs applications, provides smart reminders, and includes profiles for over 50 grass varieties.

✓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
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What's New in GDDTracker

2.3

June 18, 2026

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.

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Subscription plans

Monthly

Monthly Subscription

$0.991 Month
How to cancel GDDTracker subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

My grass is so juicy

OMG!!! My grass is so green and Lucious. Just learned that word today! Love how this app tracks my grass. YIPEEEEE!
DWHornDWHorn

AMAZING

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!
CF28485CF28485

Response from developer

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!

Love this!

Awesome tool for a new home owner who wants a beautiful lawn.
TorreyHunt1TorreyHunt1

Just what we needed

Great app!
32faris32faris

Finally

Finally an easy to use app that actually works for us lawn nerds!!
CF28485CF28485

Response from developer

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!

FAQ

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.