Instantly calculate fire danger ratings with professional-grade algorithms. Offers real-time weather data integration, visual danger level displays, and detailed action recommendations for informed fire prevention and management.
3.2.0
June 7, 2026
This update makes Fire Danger Ratings more accurate and the app smoother to use. ◆ More accurate Fire Danger Ratings — we refined how ratings are calculated, especially during long dry spells, so the numbers you rely on are more dependable. ◆ See today at a glance — a new Today summary on the weather screen shows the day's high and low plus the peak fire danger expected today, alongside the current conditions. ◆ More weather choice — you can now choose OpenWeatherMap as an alternative weather source. ◆ Better location search — finding a place is faster and more accurate, with cleaner, more consistent location names throughout the app. ◆ Smoother location handling — the app starts up more reliably, handles location permissions more gracefully, and lets you jump straight to your recent locations. ◆ Refreshed weather icons — a cleaner, more consistent set of weather icons across every weather source. ◆ Clear cached data — a new option in Settings to clear saved weather data and recent searches. ◆ Under the hood — performance, security, and stability improvements. Thanks for using FDR Calculator — we'd love your feedback!
MoreMonthly Subscription for Weather Pro
Free
Enable Local Weather
Enables a fetch of the weather details for your current position to automatically provide the FDR details for your location.
FDR Calculator is a professional tool designed to instantly calculate Fire Danger Ratings. It uses professional-grade algorithms and integrates real-time weather data to provide accurate fire risk assessments.
No, FDR Calculator is ad-free. The app is free to download and use, with an optional subscription for advanced weather features.
The 'Weather Pro' subscription offers real-time weather data, automatic location detection, weather history, and forecasts for $1.99 per month, with a 3-day free trial.
Yes, the manual calculator feature in FDR Calculator works completely offline. You can input weather parameters manually to get instant calculations without an internet connection.
FDR Calculator is available for iPhone, iPad, and iPod. It is designed for users who need to perform fire risk assessments in the field.
The app was last updated on October 20, 2025, with version 3.1.0. This indicates regular updates to ensure functionality and accuracy.
FDR Calculator provides detailed recommendations for each danger level, including fire behavior predictions, suppression strategies, prevention guidelines, and disaster management procedures.
Yes, FDR Calculator is designed with privacy in mind. All calculations are performed locally on your device, and minimal data is collected, only for weather services when using the Weather Pro subscription.
