Coming soon to iPhone — Spring 2026
GDDTracker will help you calculate accumulated Growing Degree Days, set location-based baselines, and plan precise PGR applications.
GDD Tracker
Accurate tracking with custom base temps.
Accurate tracking with custom base temps.
Multiple Lawns
Manage and monitor different lawns easily.
Manage and monitor different lawns easily.
Notifications
Get alerts when your GDD threshold is met.
Get alerts when your GDD threshold is met.
Predictive Dates
See when your GDD threshold will be reached.
See when your GDD threshold will be reached.
Lawn Fertilizer Calculator
Calculate and plan fertilizer applications.
Calculate and plan fertilizer applications.
Apple Watch App
Track GDD right from your wrist.
Track GDD right from your wrist.