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Parenting & Family
Open tool Screen Time Agreement Builder
Create a bounded, browser-local screen time agreement builder with clear inputs, guided review, and a practical output.
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Useful tools, ready when you are.
Every card opens a working workspace. Pick the job, use the tool, and move on.
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Health & Wellness
Open tool Screen Time Planner
Create a bounded, browser-local screen time planner with visible assumptions, review guidance, and downloadable output.
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Image Tools
Open tool Screenshot Stitcher
Join two to nine screenshots in vertical selection order.
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Image Tools
Open tool Screenshot to Text
Extract readable text from an authorised screenshot with bounded temporary OCR processing.
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Chemistry
Open tool Second Order Concentration Calculator
Calculate second order concentration with guided inputs, visible equations, substituted working, and model assumptions.
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Math, Statistics & Probability
Open tool Second Order Eulerian Number Calculator
Count Stirling permutations by the stated ascent index.
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Chemistry
Open tool Second Order Half Life Calculator
Calculate second order half life with guided inputs, visible equations, substituted working, and model assumptions.
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Chemistry
Open tool Second Order Reaction Time Calculator
Calculate second order reaction time with guided inputs, visible equations, substituted working, and model assumptions.
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Quality Assurance
Open tool Security Test Checklist
Create a bounded, reviewable security test checklist with visible assumptions, downloadable output, and accountable human review.
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Calculators
Open tool Self-Employment Tax Calculator
Estimate a self-employment tax provision from net income.
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Ecommerce & Marketplace
Open tool Seller Performance Dashboard
Create a bounded, browser-local seller performance dashboard with visible assumptions, review guidance, and downloadable output.
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Finance & Business
Open tool Selling General and Administrative Intensity Calculator
Express disclosed selling, general, and administrative expense as a percentage of net revenue.