Instant, evidence-based calculators and trackers — each one works in your browser, cites its sources, and never stores your data. Tap any tool to use it.
Body Mass Index with category & healthy weight range.
Open →Mifflin–St Jeor BMR, TDEE and a daily calorie target.
Open →US Navy circumference method with lean/fat mass.
Open →A realistic timeline and daily target for a safe pace.
Open →Predict your next period and current cycle phase.
Open →Your ovulation day and fertile window.
Open →Due date & current week (Naegele's rule).
Open →A weighted symptom checklist, for education.
Open →Rate daily symptoms and track their severity.
Open →See what smoking really costs you, over years.
Open →UK NHS units in your drinks and weekly total.
Open →How much is still in you, and when it clears.
Open →The 20-20-20 rule with a gentle timer.
Open →Daily check-ins, streaks and a 7-day heatmap.
Open →Fitzpatrick skin type + UV index → SPF advice.
Open →Get everything in one calm, private app — no account, no data harvesting.
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