Caffi – Caffeine Tracker

Caffi — Know your caffeine, protect your sleep. Most caffeine apps just count down from your last cup. Caffi does it properly: it models the caffeine actually in your body with a real pharmacokinetic curve — both the absorption (the rise after you drink) and the elimination (the slow decay) — so the peak and the timing are realistic, not guessed. At a glance you see how much caffeine is in your system right now, exactly when you'll be able to sleep again, and whether you're still under your daily limit. Perfect for protecting your sleep, timing a pre-workout boost, and keeping your intake in check. Features • Live caffeine level (mg/L) on a clean color gauge • "Sleep-safe" time — the moment your level drops below your personal sleep threshold, with a bedtime marker • Daily total vs. your limit, color-coded green / orange / red • Detailed curve graph with stimulation & sleep thresholds, bedtime line and your intake points • Daily and 7-day statistics with bar charts • One-tap logging from quick presets (espresso, coffee, energy drink…) — or create your own custom drinks • Glance widget so you can check your level without opening the app • Works on touch and button watches • Available in English, Dutch, German, French and Spanish Make it yours Set your body weight, caffeine half-life, sleep & stimulation thresholds, daily limit and bedtime — Caffi recalculates your personal curve instantly. Drink smart. Sleep better. Caffi.

- With a long half-life set (10 to 12 h) doses no longer vanish from the curve after 36 hours; the window now scales with your half-life - The "you can sleep" notification follows your bedtime setting instead of a fixed 18:00 to 06:00 window - Changing half-life, threshold or bedtime from the phone re-plans the notification immediately - A dose logged on an earlier day, or removed from one, updates that day in the charts instead of today