Koffee - Caffeine Tracker

Stop guessing when caffeine leaves your body.

Koffee uses a real pharmacokinetic model to show your exact caffeine level in real time — not estimates, not averages. A smooth half-life decay curve tracks every milligram from your morning espresso to your afternoon latte, showing you precisely when you'll be sleep-ready.

WHY KOFFEE

Most caffeine trackers count milligrams. Koffee shows you the science. The half-life curve visualizes how caffeine metabolizes in YOUR body based on your weight, metabolic speed, and lifestyle factors. Optional cortisol bands show the natural rhythm your body follows — so you can time your coffee for maximum effect.

TRACK EFFORTLESSLY

• One-tap Quick Log with 10 presets and custom drinks
• 50+ branded drinks from Starbucks, Dunkin', Costa, McCafe
• Dynamic Island shows your level without opening the app
• Home Screen and Lock Screen widgets
• Smart Last Call alarm before your cutoff time

PROTECT YOUR SLEEP

• Real-time countdown to when you're safe to sleep
• Sleep Impact Score (0-100) based on caffeine timing and HealthKit data
• Sleep Simulator: "What if I skip the afternoon coffee?"
• Sleep correlations with HealthKit heart rate and deep sleep data
• Personalized cutoff based on YOUR bedtime and metabolism

UNDERSTAND YOUR PATTERNS

• Caffeine Persona: discover your archetype (Early Bird, Night Owl, Rocket...)
• Yearly heatmap with 365 days of caffeine history
• Tolerance Tracker with 4-week rolling trends
• Weekly Report with actionable insights
• Koffee Wrapped: your year in review, shareable

PERSONALIZED TO YOUR BODY

• 3 metabolic speeds: slow, normal, fast
• Body model: weight, smoker, oral contraceptives, pregnancy
• Custom daily goals with streak tracking
• 16 themes from Oat Milk to Espresso

PRICING

Free tier includes full caffeine tracking, curve, countdown, Dynamic Island, Quick Log, and 4 widgets. Unlock Koffee Insights for sleep intelligence, deep analytics, premium widgets, and personalization.

• Monthly: $1.99/mo
• Annual: $9.99/yr (3-day free trial)
• Lifetime: $19.99 (one-time, yours forever)

No ads. No data selling. Your health data stays on your device.

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