GDDTracker
Growing Degree Day Calculator
Free · In‑App Purchases
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 helps you time lawn care applications with confidence. 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, and plant growth regulators for the best results.
Whether you manage a single lawn or multiple properties, GDD Tracker keeps everything organized with clear visuals, daily history, and forecasted dates to reach your target threshold. Set your base temperature, pick your threshold, and let the app do the rest—complete with advisories for wind, heat, and rain so you spray safely and effectively.
What you'll love:
• Accurate GDD calculations based on your location and daily temps
• Forecasted date to hit your target threshold
• Clear progress toward your goal with a simple percentage and badge
• No‑spray advisories for high wind, heat, or rain
• Optional device location or locked "home" coordinates
• Per‑lawn overrides for start dates and settings
• iCloud support to keep data in sync across devices
• Widgets and Apple Watch support for quick glance updates
• Privacy‑first design—no ads, no selling of your data
How it works:
1. Choose your base temperature and threshold.
2. Set your start date (e.g., last application).
3. Track daily progress as GDD accumulates.
4. 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
• 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
Both plans include 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/stdevula/
Privacy
Your data stays yours. Location is used only to fetch local weather. iCloud sync is optional. We don't sell your data or share it with advertisers.
Download GDD Tracker and take the guesswork out of lawn care timing.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Bug Fixes
• Fixed an issue where subscribed users were shown the paywall after force-closing and reopening the app
• Fixed Restore Purchases button not restoring active subscriptions
• Fixed background image causing layout clipping on some screen sizes
Improvements
• Added subscription status and Manage Subscription option in Settings
• Restore Purchases now shows loading indicator and feedback if no subscription is found
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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kirk Faris
- Size
- 13.8 MB
- Category
- Weather
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Apple Watch
Requires watchOS 11.6 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Monthly $0.99
- Annual $9.99
- Copyright
- © 2026 Kirk Faris