I recently launched QuickAgeCalc.com — a free collection of age, date, and pregnancy calculators. Two weeks in, we're at 1,500+ organic visits per week across 47 countries, with zero ad spend. Here's exactly how I built it, what worked, and what I'd do differently. The Idea I noticed that most age calculator sites are: Slow to load Cluttered with aggressive ads Mobile-unfriendly Missing obvious related tools (pregnancy due date, dog age, date difference) The opportunity: build a fast, clean, genuinely useful hub of date calculators with programmatic SEO pages for long-tail keywords. The Tech Stack Deliberately simple: Pure HTML/CSS/JavaScript — no frameworks, no build tools Cloudflare Workers — hosting, global CDN, free tier GitHub — version control + auto-deploy via GitHub Actions Cloudflare Pages — deploy on every push to main Zero monthly cost. Zero maintenance overhead.…