| What it does | Free online Texas Instruments TI 84 Plus CE graphing calculator simulator for algebra, calculus, matrices, and standardized test prep
| Snap a photo to check what something is worth based on current listings
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free: 1 scan per day on website, 3 scans total on iPhone app then 1 per week. Premium Weekly: $4.99 per week. Premium Yearly: $29.99 per year with 3-day free trial.
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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
| - Photo identification using AI for brand, model and condition
- Real-time listings from Google Shopping and eBay
- Price range with confidence levels based on listing data
- Condition adjustment that updates price in real time
- Specialist catalogues for coins, banknotes and trading cards
- Live metal prices for gold and silver
- Up to three photos per scan for detailed matching
- Collection tracking to monitor item values over time
- Labeled rough estimates when live listings are insufficient
- Full transparency with access to actual live listings and photos
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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
| - Uses current marketplace listings instead of AI training data or memory
- Shows confidence levels and actual proof you can verify yourself
- Filters out outlier listings to avoid inflated or deflated prices
- Covers specialized markets like coins and trading cards with expert sources
- Never invents numbers when data is insufficient
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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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calc84online
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