I built it to pressure test my own FIRE numbers. The calculators I found were either ad-farms around a widget, or wanted accounts/emails before they revealed the number.

And when I saw how much the FIRE communiry had to maintain spreadsheets, I wanted to make something that required zero setup.

All of the math runs in the browser. No account needed. No data base. Not even local storage. The whole state lies in the URL, so sharing is just copying the link. It's a static site on Cloudflare Pages.

Standard/Coast/Barista as tabs. Lean/Fat/SWR as separate pages. The Trinity study as the foundation.

What would you guys disagree with.. The 7% default? The 4% rule? What should be adjustable which is not atm?