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firenum™ vs Snow Day Calculator

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

firenum™ compared with Snow Day Calculator
Detailfirenum™ logo firenum™Snow Day Calculator logo Snow Day Calculator
What it doesFree FIRE financial planner with Monte Carlo simulation and historical backtesting Predict school closures and delays with live weather for any US or Canadian location
StageEstablished Not given
Founded2019 Not given
Based inNot given US
Pricing modelFree Free
PricingNot given Not given
Key features
  • Monte Carlo simulation with up to 5,000 runs
  • Historical backtesting against every market period since 1872
  • US federal, state and payroll tax calculations for all 50 states
  • Roth conversion ladder and RMD planning
  • Six stress tests including market crash and job loss
  • Three withdrawal strategies with 59.5 rule enforcement
  • Support for 9 asset types with individual growth rates
  • Month-by-month income and expense modeling with custom timelines
  • Life event planning
  • 9-currency support with auto-detection
  • Live weather data integration from OpenWeatherMap and Open-Meteo
  • Multi-factor weather analysis including temperature, snowfall, wind, visibility, and ice risk
  • Probability scoring with detailed factor breakdown
  • Support for US ZIP codes and Canadian postal codes
  • GPS location detection
  • 50+ specialized winter calculators
  • Mobile-responsive progressive web app design
  • Local browser storage for recent searches with no account required
  • Hourly forecast view
  • Saved locations feature
What makes it different
  • Runs entirely in your browser with no account needed or data stored on servers
  • Tests retirement against 154 years of historical market data since 1872
  • Calculates exact tax liability for all 50 US states plus federal and payroll taxes
  • Completely private with no data collection, selling or sharing
  • Works offline on Android with full planner functionality
  • Explains the factors behind each prediction rather than showing an unexplained percentage
  • Independent platform not affiliated with school districts or government agencies
  • Continuous model refinement based on outcome review against reported closures
  • Privacy-first architecture with no location data transmission or sale
  • Accessible design with keyboard navigation and WCAG compliance
Community votes00
DR (Domain Rating by Ahrefs)12 no change since last check10 no change since last check
Trust Flow (Majestic)42
Citation Flow (Majestic)3411
Referring domains (Majestic)12729

4 details filled in for both companies.

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