One-tap logging
Your café order is two taps away — flat white, magic, long black, energy drink. Recents float to the top automatically.
iPhone · Apple Watch · Apple Health
See your caffeine,
in real time.
Piccolo turns every coffee into a living blood-caffeine curve — so you know how much is in you right now, when it'll be gone, and whether it'll still be keeping you up at bedtime.
Get an early TestFlight invite + a heads-up the day we launch. No spam, ever.
Download on the
App Store
Free on iPhone & Apple Watch. Requires iOS 26.
Today
Caffeine
112.4mg active
Total today380 mg
Projection · next 12h
Sleep-aware cutoff
Last safe drink2:30 PM
~18 mg still active at bedtime from earlier drinks.
Today's intake
Flat white6h ago160 mg
Magic3h ago100 mg
Long black25m ago · active120 mg
One-tap logging·
Real-time PK curve·
Sleep-aware cutoff·
Apple Health–backed·
Made in Australia
What it does
A coffee tracker that actually understands coffee.
Real-time blood-caffeine curve
A pharmacokinetic model turns each drink into a curve — rising to a peak around 45 minutes, then tapering as you metabolise it.
Sleep-aware cutoff
Tell Piccolo your bedtime and it works out your last safe coffee — factoring in what's still active from earlier in the day.
Health-backed & private
Your caffeine lives in Apple Health and syncs through your own private iCloud. It never touches our servers — we don't have any.
On your wrist
Log a coffee from Apple Watch and read your current level at a glance — straight from a complication on your watch face.
The Australian menu, built in
A curated AU catalogue with researched caffeine estimates — and fuzzy search, so typing "coke" still finds Coca-Cola.
A closer look
Designed to be glanced at.
Projection
128.0mg · 1:10 PM
peak of the day
Drag across the curve to inspect any moment →
2:55
112mg
active
＋ Log
The science
Not a counter. A model.
Most apps just add up milligrams. Piccolo runs a one-compartment pharmacokinetic model — the same maths clinicians use — over every drink you log.
Each coffee is absorbed to a peak about 45 minutes in, then decays at your half-life (5 hours by default, and adjustable). Stack a few drinks and the curves add up, giving you the one number that matters: how much caffeine is active right now.
C(t) = D · (ka / (ka − ke)) · (e−ket − e−kat)
One 80 mg drink, plotted by the real engine.
Sleep
The 3 p.m. coffee that's still awake at midnight.
Caffeine outlasts the buzz. With a five-hour half-life, around a quarter of your 2 p.m. coffee is still circulating at midnight — quietly blocking the adenosine that's trying to make you sleepy.
Piccolo projects every drink forward to your bedtime, so you can see what'll still be active when your head hits the pillow — instead of guessing.
Set your bedtime once and it works out your last safe cup from everything you've already had that day, then nudges you as that window closes. Metabolise fast or slow? The half-life is yours to adjust.
~25%
of a 2 p.m. coffee is still in you at midnight
2:30 PM
today's last safe cup — before it starts costing you sleep
A single 2 p.m. coffee, projected to your bedtime by the real engine.
Your data stays yours.
Piccolo has no account and no third-party SDKs. Everything you log is stored in Apple Health and synced through your private iCloud — never to a server we control. Delete the app and your history lives on in Health.
Be one of the first to try Piccolo.
Piccolo is here.
The beta is rolling out via TestFlight. Drop your email and we'll send an invite — plus a nudge the day Piccolo lands on the App Store.
iPhone & Apple Watch · iOS 26 · No spam, unsubscribe anytime.
Free on iPhone and Apple Watch. Track your caffeine, sleep better.
Download on the App Store