FDR Calculator vs WindNinja Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FDR Calculator
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.
- Instant Fire Danger Index calculations
- Real-time weather data integration
- Visual color-coded danger levels
- Detailed action recommendations
- Manual calculator for offline use
- Automatic location detection
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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
WindNinja Mobile
This mobile application provides a user interface for initiating and viewing wind field simulations. It is designed to support wildland fire management by computing spatially varying wind data. More information is available on the firelab.org website.
- Initiate wind simulations
- View wind field data
- Spatially varying wind computation
- Wildland fire support tool
- Mobile interface
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WindNinja is a computer program that computes spatially varying wind fields for wildland fire support. WindNinja Mobile is a mobile interface for initiating and viewing WindNinja simulations. Visit firelab.org/project/windninja for more details.
Screenshots
Verdict
The clearest difference is in-app purchases: WindNinja Mobile at none against FDR Calculator's 1. WindNinja Mobile also leads on review sentiment (33% vs 0%) and iOS requirement (13.0 vs 15.0). FDR Calculator's advantage is update cadence (every 4 months vs every 8 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. FDR Calculator sells 1 in-app purchase, starting at $1.99 per month. WindNinja Mobile asks for nothing beyond the download.
FDR Calculator ships an update every 4 months, WindNinja Mobile every 8 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | FDR Calculator | WindNinja Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.6 (9 ratings) — better |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | — | 9 — better |
| Update frequency | Every 4 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 35 MB | 108 MB |
| Age rating | 4+ | 4+ |
| Developer | Alan Richert | US Forest Service |
Customer experience
FDR Calculator
WindNinja Mobile
In-app purchases
FDR Calculator
- Weather Pro (Monthly)3 Days trial$1.991 Month
WindNinja Mobile
No in-app purchases
Questions
Is FDR Calculator free?
Is WindNinja Mobile free?
Do FDR Calculator or WindNinja Mobile have ads?
Which is updated more often, FDR Calculator or WindNinja Mobile?
Other comparisons
