Most fitness calculators online are either bloated with ads, hidden behind sign-ups, or built on outdated formulas like BMI. FFMI Check is a single-page hub for the four metrics
serious lifters actually track: FFMI + Normalized FFMI (Kouri 1995), TDEE (Mifflin-St Jeor), daily macros, and 1RM (Epley + Brzycki averaged). Mobile-first, zero accounts, zero data
stored — every calculation runs locally in your browser.
