Build a tool for creating interactive lead-magnet calculators, the kind marketers embed on landing pages. 1) Visual builder: user describes the calculator in plain English (e.g. ROI of email marketing for a small agency) and AI generates the questions, inputs, and result formula as a first draft. 2) Formula editor: users can inspect and edit the underlying math with plain-English explanations of each variable. 3) Question types: sliders, dropdowns, number inputs, and toggles with inline validation. 4) Result page with AI-written personalized analysis that reflects the user's answers, plus a call-to-action block the marketer controls. 5) Lead capture gate before showing full results, with email and CRM webhook integrations. 6) Embed as a script or iframe on any site, and a hosted share link for ads. 7) Analytics: views, completion rate, average results, and leads generated. 8) A/B test two result headlines. 9) Templates library seeded with proven calculators: pricing, ROI, savings, and quiz-style graders.