Caffeine track - Doppio

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? 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 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 SLEEP BETTER • Caffeine and sleep insights: compare your sleep scores on higher- and lower-caffeine nights • Bedtime forecast: your projected caffeine level at bedtime and a "last coffee by" time • Reads Apple Health sleep to show your last 7 nights with quality scoring • Morning suggestions that adapt to how you actually slept BUILD BETTER HABITS • Daily limit with notifications • Under-limit streaks with milestone celebrations • Guided caffeine detox plans (7/14/21/30 days) with symptom tracking BREW LIKE A PRO • Caffeine and ratio calculator for 9 brewing methods • Save your dialed-in recipes and start one in a single tap • Brew timer with a Lock Screen and Dynamic Island Live Activity • Start your favorite brew with Siri or a Shortcut AT A GLANCE • Home Screen widgets in three sizes • 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 FREE FOR 14 DAYS, THEN YOUR CHOICE Every feature is unlocked for your first two weeks. After that, tracking stays free forever — logging caffeine, your live metabolism curve, daily limits, Apple Health sync, and iCloud backup never expire. Doppio Pro keeps the extras: the detox planner, the brew calculator and timer, caffeine-and-sleep insights, Home Screen widgets, your full history, and the app themes. 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.