Track your caffeine. Sleep better.
Koffee uses real pharmacokinetic modeling to show exactly how caffeine affects your body and sleep — so you can make smarter choices about your next cup.
How it works
From your first sip to a better night's sleep.
Log your drink
One tap from 60+ drinks, Siri, or Apple Watch. Takes 2 seconds.
See your caffeine curve
A real pharmacokinetic model calculates absorption, peak, and decay — not a simple timer.
Know when to stop
Get a personal "last call" time so your coffee habit never costs you sleep.
What makes Koffee different
Real Pharmacokinetics
Not a simple counter. A real model that calculates absorption and decay of every caffeine dose in your system.
Sleep Intelligence
Know exactly how your 3pm coffee affects tonight's sleep. Get a personalized "last call" time every day.
Personalized to You
Everyone metabolizes caffeine differently. Koffee adapts to your weight, metabolism speed, and cortisol rhythm.
Everywhere You Look
Widgets, Apple Watch, Dynamic Island, and Lock Screen. Your caffeine level always at a glance.
Ready to optimize your caffeine?
Download Koffee and start sleeping better tonight.