FDR Calculator

Fire Danger Index Calculator

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

PROFESSIONAL FIRE RISK ASSESSMENT MADE SIMPLE Calculate Fire Danger Ratings instantly with precision and confidence. Designed for fire management professionals, land managers, and safety authorities who need accurate fire risk assessments in the field. WEATHER PRO SUBSCRIPTION UNLOCKS ◆ Real-time weather data integrated directly into FDR calculations ◆ Automatic location detection or search any location worldwide ◆ Complete weather history and forecasts for informed planning ◆ Automatic FDR ratings - weather data updates calculations instantly ◆ No more manual data entry - let Weather Pro do the work REAL-TIME FDR CALCULATION ◆ Instant Fire Danger Index calculations based on weather conditions ◆ Professional-grade algorithms for accurate risk assessment ◆ Visual color-coded danger levels (Blue, Green, Yellow, Orange, Red) ◆ Manual calculator always available for offline use INTERACTIVE GAUGE DISPLAY ◆ Beautiful visual gauge showing current fire danger level ◆ Intuitive interface with easy-to-read results ◆ Tap gauge for detailed action recommendations COMPREHENSIVE ACTION GUIDANCE ◆ Detailed recommendations for each danger level ◆ Fire behavior predictions and suppression strategies ◆ Prevention guidelines and aircraft management protocols ◆ Disaster management procedures for high-risk conditions FLEXIBLE WEATHER INPUT Weather Pro Mode (Subscription): ◆ Automatic real-time weather updates ◆ Current location or custom location search ◆ Historical data and multi-day forecasts ◆ Set-and-forget automated monitoring Manual Calculator: ◆ Temperature, humidity, and wind speed sliders ◆ Days since rain and rainfall amount tracking ◆ Precise manual input options for exact values ◆ Real-time calculation updates as you adjust parameters ◆ Works completely offline PERFECT FOR: ▶ Fire management authorities ▶ Emergency services personnel ▶ Land and forest managers ▶ Agricultural professionals ▶ Safety and risk assessment teams ▶ Anyone responsible for fire prevention planning PRIVACY-FIRST DESIGN: ▶ All calculations performed locally on your device ▶ Minimal data collection - only for weather services when using Weather Pro ▶ Manual calculator works completely offline with no data transmission ▶ Weather Pro data encrypted and secure

Ratings & Reviews

  • This app’s overall rating was recently reset.

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!

Version 3.2.0

The developer, Alan Richert, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • A Richert
Size
  • 37.2 MB
Category
  • Weather
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2025 Alan Richert
  • Developer Website
  • Privacy Policy

    • More by Alan Richert

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