Health Tools
Science-backed health and wellness calculators. Calculate daily TDEE calories, schedule intermittent fasting windows, and optimize sleep cycles.
Make informed wellness decisions using verified metabolic and circadian formulas. Calculate exact caloric expenditure, track water hydration targets, and optimize your 90-minute REM sleep cycles.
TDEE + Macro Calculator
Calculate TDEE, set a weight goal with a deadline, and get a customized macro split with pie chart and timeline.
Intermittent Fasting Calculator
16:8, 18:6, OMAD, 5:2 and more — get your eating/fasting window, live countdown timer, fasting benefit stages, and workout timing advice.
Sleep Cycle Calculator
Find the optimal time to wake up or go to sleep based on 90-min sleep cycles. Includes chronotype, sleep debt tracker, and nap calculator.
Water Intake Calculator
Personalized daily water goal based on weight, activity, climate zone, diet, and beverage hydration coefficients. Hourly reminder schedule included.