# FDR Calculator

> Fire Danger Index Calculator

Canonical page: [https://chrome-stats.com/d/id527055670](https://chrome-stats.com/d/id527055670)

## Overview

- **ID:** `id527055670`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Alan Richert
- **Category:** Weather
- **Version:** 3.2.0
- **Last updated:** 2026-06-07
- **First published:** 2012-05-22
- **Size:** 35 MB
- **Data as of:** 2026-09-04
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/fdr-calculator/id527055670)
- **Website:** [https://www.fdrcalculator.com](https://www.fdrcalculator.com/)
- **Privacy policy:** [https://www.fdrcalculator.com/privacy-policy/](https://www.fdrcalculator.com/privacy-policy/)

## Description

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

## Rankings

- #1,827,758 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id527055670)