Caffy: Caffeine Sleep Tracker

Know your exact caffeine level in real time — and the precise moment you'll be ready to sleep tonight. Now with a beautiful new animated dashboard.

Caffy shows your exact caffeine level right now, and tells you precisely when you'll be ready to sleep tonight.

Using pharmacokinetic half-life models backed by FDA, EFSA & NIH research, Caffy calculates your personal caffeine curve based on your biology.

WHAT MAKES CAFFY DIFFERENT: • Real-time caffeine decay curve — personalized to your age, gender & sensitivity • Sleep readiness score (0–100) — know if tonight's sleep is at risk before bedtime • Focus window — see exactly when your caffeine peaks for maximum productivity • AI Weekly Analysis — AI reveals your personal caffeine patterns • Caffeine Detox Programs — structured plans to reduce dependence gradually • 6 Live Widgets — caffeine data on your Home Screen and Lock Screen • 5 Languages — English, Turkish, German, Spanish, Japanese

PERSONALIZED HALF-LIFE: Your body processes caffeine differently. Caffy accounts for: • Pregnancy (9h / 12h / 18h half-life) • Oral contraceptive use (7h half-life) • Smoking status (3h half-life) • Age, gender & caffeine sensitivity

SCIENCE-BACKED: Caffy's model uses the same caffeine decay formula cited by FDA, EFSA, NIH, and the Sleep Foundation — not estimates, not averages. A 45-minute absorption phase followed by exponential decay based on your personal half-life.

PRIVACY FIRST: No ads. No data selling. Anonymous by default — no registration required on first launch. Your data syncs across devices via an encrypted, GDPR-compliant database.

DISCLAIMER: All estimates are based on generalized scientific models and do not constitute medical advice. Consult a healthcare professional for personalized guidance.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/