Time lawn care perfectly with GDD Tracker. Get local weather, smart forecasts, and reminders so you apply treatments at the right time—without the guesswork.
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.
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!
Love this!
TorreyHunt1
Awesome tool for a new home owner who wants a beautiful lawn.
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.
Version 2.3
The developer, Kirk Faris, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
