Doppio: Caffeine track

Doppio is a beautifully native caffeine tracker for coffee lovers who want to know — not guess — what's in their bloodstream. Log every espresso, cold brew, or matcha and watch your caffeine level rise and fall in real time, calculated with a pharmacology-grade 5-hour half-life. Sync to Apple Health, get a Home Screen widget, time your pour-over from the Dynamic Island, and — when you're ready — taper down with a guided detox plan. 100% native. SwiftUI, SwiftData, HealthKit. No accounts. No tracking pixels. Your data stays on your device. WHAT YOU CAN DO • Track 21 preset drinks (espresso, lungo, americano, latte, cold brew, matcha, energy drinks, and more) or log custom amounts • Watch your live caffeine curve update second by second • See predictions: when will you drop below 100 mg? When can you sleep? • Set a daily limit with a gentle nudge when you cross it BREW LIKE A BARISTA • Calculator for 9 methods: espresso, AeroPress, V60, Chemex, French press, moka pot, cold brew, pour over, drip • Dial in dose, ratio, grind, and roast — get an accurate caffeine estimate before the first sip • Brew timer with Live Activity on the Dynamic Island and Lock Screen • Step-by-step countdown that won't burn your bloom THE DETOX PLANNER Cutting back doesn't have to mean cold turkey. Build a 7-, 14-, 21-, or 30-day reduction plan with three curves (linear, gradual, aggressive) and the app will set a daily ceiling that drops a little each morning. • Log 10 symptom types (headache, fatigue, brain fog, irritability, and more) with intensity and duration • Headaches sync to Apple Health so your medical record stays complete • Smart suggestions extend the plan automatically if your symptoms spike • Daily encouragement and over-limit alerts keep you honest APPLE HEALTH, WITHOUT THE DRAMA • Two-way sync of caffeine intake • Read sleep data from the last 7 nights with a quality score • See whether late-day caffeine is wrecking your sleep • Write headache symptoms during detox • Granular permissions — turn on only what you want HOME SCREEN & DYNAMIC ISLAND • Widgets in three sizes: current level, daily progress, detox heatmap, mini chart • Live Activity for brew timers — keep your phone closed while the V60 runs • Deep links from the widget straight to Add, Brew, or Detox PERSONAL TOUCHES • Five themes: Classic Brown, Modern Blue, Nature Green, Sunset Orange, Midnight Purple • Reorder and hide drinks you never use • Experimental Labs (opt-in): low-caffeine alerts when you dip below a threshold PRIVACY FIRST All your caffeine, brewing, and symptom data lives in SwiftData on your device. HealthKit data never leaves Apple's ecosystem. Optional, opt-in analytics help us fix bugs and improve features — turn it off in Settings and nothing leaves the app. Requires iOS 17 or later. HealthKit features and the Brew Timer Live Activity require an iPhone. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://codingfactory.craft.me/doppio-privacy-policy