Your data stays on your iPhone. No account, no sign-up.
3:12
TUESDAY, JULY 8
Last Call
6 clean nights
IN YOUR SYSTEM
66mg
peaked 99 mg at noon
LAST CALL
3:46PM
for one espresso · 63 mg
TODAY'S CURVEhalf-life 5.5 h
You'll dip below 50 mg around 9:04 PM — clear for a clean night.
QUICK LOG
Espresso63 mg
Drip 8 oz95 mg
Cold brew155 mg
More
HOW IT WORKS
Caffeine sets like the sun.
Every cup decays on a curve — half of it is still in you 5.5 hours later. Last Call plots the curve against your bedtime and finds the one moment that matters.
Log in two taps10 built-in drinks with real caffeine numbers. Favorites live on the home screen.
Get your last callReal decay math counts back from your bedtime to the latest minute a coffee still clears in time.
Sleep like itCOMING SOON
One nudge 30 minutes before cutoff — nothing else, ever. Clean nights build a streak you'll protect.
YOUR SLEEP VS CAFFEINE AT BEDTIME
WITH APPLE HEALTH
Nights under 50 mg buy you 42 more minutes of sleep.
Connect Apple Health and Last Call plots your own sleep against caffeine at bedtime. Not a study — your data, on-device, making the case night after night.