Caffeine Tracker & Calculator

Caffeine Tracker & Calculator shows how much caffeine is in your body right now, and when it will drop low enough for real sleep. Log a drink in two taps and the app maps your level hour by hour, so a 4 pm espresso stops turning into a 2 am problem.

SEE THE CAFFEINE IN YOUR SYSTEM
✓ Live decay curve: a clear caffeine in system calculator for your whole day
✓ The built-in caffeine half life calculator shows when your last cup wears off
✓ Bedtime forecast: the caffeine sleep calculator predicts your level at lights-out
✓ Understand why you feel wired at midnight when your last coffee was at lunch

A CAFFEINE TRACKER FOR EVERY DRINK
✓ Coffee, espresso, tea, matcha, energy drinks, cola, pre-workout: log them all in seconds
✓ Serving sizes you can adjust to the mug you actually use
✓ Add a custom drink once, reuse it forever
✓ Daily, weekly, and monthly charts reveal your real habits

SET A LIMIT THAT FITS YOUR BODY
✓ Get a personal target from the caffeine calculator by weight and age
✓ A daily caffeine intake calculator keeps your running total in view
✓ The caffeine limit calculator warns you before one more cup pushes you over
✓ Tune the caffeine metabolism calculator if your body clears caffeine faster or slower than average

CUT BACK OR QUIT CAFFEINE
✓ Step down gradually instead of going cold turkey
✓ The caffeine tolerance calculator shows how your sensitivity shifts as you drink less
✓ Watch your weekly average fall and your sleep quality climb
✓ Fewer jitters, less afternoon anxiety, steadier energy

SMART REMINDERS
✓ A cut-off alert tells you when it is time to switch to decaf
✓ An optional evening check-in catches drinks you forgot to log
✓ Quiet by default: you choose which alerts to keep

HOW IT WORKS
Caffeine leaves your body slowly. Five to six hours after a cup, about half of it is still in your blood. The app applies that decay to every drink you log, adds the doses together, and turns the result into one simple line: your level now, and your level at bedtime. Fill in your weight and age and the defaults adjust to your body. No spreadsheets, no manual math, no guessing.

WHO IT IS FOR
Light sleepers. Anyone whose heart races after a strong cold brew. Athletes who time pre-workout doses. People keeping under a strict daily cap for health reasons. Students in exam season. If you have ever lain awake doing coffee math in your head, this caffeine app does the math for you.

Good sleep starts hours before bed. Download Caffeine Tracker & Calculator, find your personal cut-off time, and wake up rested.