Caffi

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.