Reckonia builds free, single-purpose calculators that do one thing well. Each tool is a real working calculator paired with a plain-English explainer: the formula, a worked example, and the edge cases that trip people up.
We focus on money and everyday decisions: loans, debt, credit cards, pay, discounts, and more. No sign-ups, no walls of ads inside the tool, no filler.
How we build
Every calculator's math is unit-tested, and every explainer is written and checked by hand rather than mass-generated. If a number looks off, tell us and we'll fix it.