| What it does | Free online Texas Instruments TI 84 Plus CE graphing calculator simulator for algebra, calculus, matrices, and standardized test prep
| Ultra-marathon nutrition calculator for race-day fuelling
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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 | - High-resolution color graphing with function plotting and curve rendering
- Numerical derivatives and definite integrals for calculus
- Matrix operations and linear system solving with row reduction
- Statistical regressions and data list analysis
- Fullscreen mode with keyboard shortcut support
- TI-30XS MultiView scientific calculator mode
- Mobile responsive design with touch-friendly buttons
- Works on Chromebooks, iPads, Mac, Windows, and Linux browsers
- No installation, account creation, or downloads required
| - 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 | - Completely free with no paywalls, subscriptions, or account requirements
- Privacy-first architecture: calculations stay on your device, never transmitted to servers
- Accurate emulation of authentic Texas Instruments hardware syntax and functions
- Distraction-free learning environment with no ads or pop-ups
| - 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) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 18 | 0 |
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| Referring domains (Majestic) | 2 | 0 |
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