Caffeine Tracker - 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: which cup can you still have before bed? 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 • History for today, the last few days, this week, or the last month KNOW YOUR METABOLISM • A quick onboarding questionnaire estimates your caffeine sensitivity • Your personalized half-life powers every chart, widget, and forecast BUILD BETTER HABITS • Home suggests what you can still drink before bed, and how many servings fit — plus how the forecast is worked out • Daily limit with notifications • Under-limit streaks with milestone celebrations • A morning suggestion that adapts to how you actually slept • Rate how you slept each night, and see efficiency, awakenings, and sleep stages when Health has the data BREW LIKE A PRO • Caffeine and ratio calculator for 11 methods, from French press to Turkish coffee and a La Pavoni lever • 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, also built for StandBy • One-tap logging from the widget and Control Center, or open straight to the drink picker • Log, check, and undo with Siri — or find your drinks and brews in Spotlight ACROSS YOUR DEVICES • iCloud keeps your caffeine log, coffee shelf, and saved brews in sync • Works on iPhone, iPad, and iPhone Duo, in portrait and landscape APPLE HEALTH • Two-way caffeine sync — write what you log, or import caffeine already in Health, your Apple Watch, or another app • Sleep read and headache-symptom logging • Every sync is opt-in and controlled by you ACCESSIBLE TO EVERYONE • VoiceOver throughout, with charts you can listen to and brew timers that speak • Clear text in every theme, plus Reduce Motion and larger text sizes • A simplified Assistive Access version of Doppio for people who want fewer choices DOPPIO PRO Everything above is free. Doppio Pro adds: • Caffeine Insights — your personal last-coffee time, a Last Call reminder before it, your full stats, and a day-by-day breakdown of everything you've logged • Full History — every day you've ever logged, beyond the last month • Caffeine & Sleep Insights — see how your sleep score changes on high- and low-caffeine nights. Your first finding is free. • Detox Planner — guided 7–30 day plans to cut back, with symptom tracking. Preview your plan for free. • Saved Brews — your first recipe is free; save more and start any in one tap, from the app, a widget, or Siri • Coffee Shelf — keep your beans, roasters, and ratings in one place — with photos and storage tracking • 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. Installed Doppio before version 3.0.0? Full history and your last-coffee time stay free for you. Available in English, German, Spanish, French, Italian, Dutch, Portuguese (Portugal and Brazil), Japanese, Korean, Turkish, and Serbian. 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. Doppio uses anonymous usage analytics, which never include your caffeine logs, health samples, or notes.