Most apps just count milligrams. Last Cup models what caffeine actually does inside your body — and tells you exactly when to stop so it never steals your sleep.
No account · nothing leaves your phone · science you can check
A live ring shows exactly how much caffeine is active in your system right now — falling minute by minute.
Before you drink, see how many extra minutes it'll take to fall asleep, the hit on deep sleep, and a quality score.
Weight, chronotype, sensitivity, hormones — Last Cup adapts to you instead of a one-size-fits-all number.
It learns your real caffeine half-life from how you actually sleep, getting more accurate every night.
Built on published pharmacokinetic research. Every claim links to its PubMed source inside the app.
No account, no cloud, no tracking. Everything runs on your iPhone and your data never leaves it.
Coffee, tea, espresso or an energy drink — in two taps.
The ring shows what's active now and when you'll clear it.
Each drink reveals its exact impact on tonight's sleep.
Know your cutoff, hit it, and wake up rested.
Every drink in the grid shows what it would add to tonight's sleep — so you can swap that 4 pm espresso for a decaf before it costs you 25 minutes.
Peak days, total intake, your real half-life, and the best window for focus — Last Cup turns your habits into insight, not just numbers.
Watch caffeine rise and fall across your whole day, with your sleep-safe threshold and bedtime marked — so the cutoff is never a guess.
A two-compartment absorption model, plasma-concentration and receptor-occupancy math, and sleep-impact predictions calibrated on peer-reviewed studies.
Blanchard & Sawers 1983 · Fredholm 1999 · Drake 2013 · Carrier 2009 · 17 PubMed sources linked in-app
Last Cup runs entirely on your device. There's no account to create, nothing syncs to a cloud, and your caffeine and sleep data never leave your phone.
Last Cup is coming to the App Store. Drink your coffee — just stop in time to sleep.
Last Cup