Caffeine track - Doppio

Doppio is now free — track every cup, see your metabolism curve, and brew better coffee at no cost. Doppio Pro adds deeper insights, detox plans, and more.

Doppio is a native caffeine tracker that estimates how much caffeine is still in your system right now — and how it fades over the hours ahead.

Log drinks in a tap, watch your levels decay on a personalized metabolism curve, and finally answer the question that matters: is that afternoon coffee going to keep you up tonight?

Doppio is free. Track your caffeine, see your metabolism curve, and brew better coffee without paying anything — ever.

TRACK EVERY CUP • 21 built-in drinks plus custom entries • Adjust serving size from 10–100% • Edit, annotate, and delete past entries • Real-time caffeine level based on your personal half-life • Full history at any time range — today, this week, this month, or all time

KNOW YOUR METABOLISM • A quick onboarding questionnaire estimates your caffeine sensitivity • Your personalized half-life powers every chart, widget, and forecast • Retake or reset the profile any time in Settings

BUILD BETTER HABITS • Daily limit with notifications • Under-limit streaks with milestone celebrations • A morning suggestion that adapts to how you actually slept

BREW LIKE A PRO • Caffeine and ratio calculator for 10 brewing methods • Brew timer with a Lock Screen and Dynamic Island Live Activity • Start your favorite saved brew with Siri or a Shortcut

AT A GLANCE • Home Screen widget with your caffeine level • One-tap logging from the widget and Control Center

ACROSS YOUR DEVICES • iCloud keeps your caffeine log, coffee shelf, and saved brews in sync • Uses your own private iCloud — there is no Doppio account to create

APPLE HEALTH • Optional two-way caffeine sync, sleep read, and headache-symptom logging • Every sync is opt-in and controlled by you

DOPPIO PRO Everything above is free, forever. Doppio Pro adds: • Caffeine Insights — your full stats, a bedtime forecast with a "last coffee by" time, and a day-by-day breakdown of everything you've logged • Caffeine & Sleep Insights — see how your sleep score changes on high- and low-caffeine nights • Detox Planner — guided 7–30 day plans to cut back, with symptom tracking • Saved Brews — dial in a recipe once and start it in a single tap, from the app, a widget, or Siri • Coffee Shelf — keep your beans, roasters, and ratings in one place • Five extra app themes • Larger Home Screen widgets with your metabolism curve and detox progress

Doppio Pro is available as a yearly subscription or a one-time lifetime purchase. No ads, ever.

Available in English, German, Spanish, French, Italian, Dutch, and Portuguese.

Caffeine figures in Doppio are estimates. They come from a standard half-life model adjusted by the answers you give during setup — not from measuring your body. Doppio is not a medical device and does not provide medical advice; talk to a clinician about specific health concerns.

Your data stays on your device and in your private iCloud unless you enable Apple Health sync. Analytics are optional and never include your caffeine logs, health samples, or notes.