| What it does | Free online Texas Instruments TI 84 Plus CE graphing calculator simulator for algebra, calculus, matrices, and standardized test prep
| Free Amazon FBA calculators and seller tools with verified 2026 fee rates
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
| CN
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free core tools with no signup. Pro plan: $29.99/month or $299/year (save 17%). One-time fee audit service: $299 for up to 50 SKUs, $4 per extra SKU.
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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
| - FBA Profit Calculator with all hidden fees
- PPC Analyzer for ACOS and ROAS calculation
- Fee Simulator comparing fulfillment methods
- Listing Grader with optimization tips
- Review Analyzer for competitive insights
- Inventory Optimizer with restock alerts
- Cost Tracker for expense management
- Real-time exchange rate conversion updated every 5 minutes
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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
| - 50+ free tools with no signup, login or credit card required
- Fee rates verified monthly with open-source data published under CC BY 4.0
- Built by an 8-year Amazon FBA seller addressing real seller pain points
- Supports multiple marketplaces: Amazon US/EU/UK/JP/CA/AU, Temu, TikTok Shop, and Etsy
- Transparent formulas using industry-standard calculations verifiable by users
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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 | 23 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 18 | 16 |
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| Referring domains (Majestic) | 2 | 10 |
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