| What it does | Predict school closures and delays with live weather for any US or Canadian location
| Ultra-marathon nutrition calculator for race-day fuelling
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free account with demo calculator and one saved plan. Pro is €13 EUR once per plan for aid-station planner, race-day forecast, sharing, PDF, race-week reminder and learning from past race.
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| Key features | - 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
| - Carbohydrate, fluid and sodium calculations per hour based on weight, effort and weather
- Fuel ideas in gels, chews, drink mix or real food with mixed strategy options
- Aid-station planner with up to 60 stations and drop-bag lists
- GPX file import for race route and waypoints
- Race-day forecast with heat-index adjustments
- Hour-by-hour race plan table with night-race adjustments
- Shareable private links to share plans with crew
- Printable PDF of the complete race plan
- Race-week reminder by push or email with key numbers
- Post-race review to learn from past races
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| What makes it different | - 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
| - Demo calculator requires no account and sends nothing to the browser
- One-time €13 EUR payment per plan with no subscription
- Personalised calculations based on published sports-nutrition ranges scaled to your weight and conditions
- Plans are private by default with revocable sharing links
- No ad trackers and ability to delete all personal data
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 10 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 2 | 0 |
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| Citation Flow (Majestic) | 11 | 0 |
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| Referring domains (Majestic) | 29 | 0 |
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Snow Day Calculator
UltraCalcPal