Free Tool Desk - is that free calculator, generator or grader worth building?

Paste what your company sells and your notes on one free-tool idea - a calculator, generator, grader, tester, library or quiz you would give away as marketing. Free in your browser: what a lead is worth, the first year's lead value against the build plus upkeep, the payback, the leads a month it needs, and flags for the skill's pitfalls. Then a score lane rates the eight factors and says build, build smaller or don't build, and a plan lane scopes the first version: one job, the gate, the keyword, milestones and the three numbers to track. Derived from the agent skill @coreyhaines31/free-tools by Corey Haines (coreyhaines31/marketingskills, MIT).

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.