Tazza vs ComboLoop

Tazza is the caffeine tracker that actually knows you. Unlike generic trackers that treat everyone the same, Tazza builds a real-time caffeine decay curve personalized to your unique metabolism, factoring in sensitivity, health conditions, medications, and lifestyle. Watch your caffeine level drop in real-time and know exactly when you're sleep-ready. REAL-TIME CAFFEINE CURVE See your actual caffeine level right now — not a guess, but a pharmacokinetic model personalized to you. Watch the curve update live with every drink you log. SLEEP-SAFE COUNTDOWN "You'll be sleep-ready by 9:47 PM." No more guessing whether that afternoon coffee will keep you up tonight. PERSONALIZED METABOLISM Your body isn't average. Tazza adjusts for pregnancy, smoking, contraceptive use, CYP1A2 medications, and your personal sensitivity level. Your curve. Your body. APPLE WATCH Log drinks from your wrist in one tap. Complications show your current caffeine level at a glance. Smart predictions suggest what you'll drink based on time of day and habits. LIVE ACTIVITIES & DYNAMIC ISLAND Your caffeine status lives on your Lock Screen and Dynamic Island — always visible, always current. No other caffeine tracker has this. WIDGETS EVERYWHERE 8 widget types for Home Screen and Lock Screen. Plus a Control Center button for instant logging. 100+ DRINKS BUILT IN Starbucks, Dunkin', Dutch Bros, Peet's, Tim Hortons, Monster, Celsius, Red Bull, and more. Plus create unlimited custom drinks. SMART NOTIFICATIONS Get reminded before your personal caffeine cutoff, warned when approaching your daily limit, and celebrated for tracking streaks. INSIGHTS THAT MATTER (Premium) Full analytics with weekly trends, streaks, and activity heatmaps. Sleep correlation insights show how caffeine affects your rest. Siri Shortcuts let you log hands-free. Free to use with a generous feature set. No subscriptions, Premium is a one-time $6.99 purchase.

The hardest part of a habit isn’t day one. It’s day twelve, when nobody’s watching and the motivation is gone. ComboLoop gives you a reason to keep showing up. Every completed day adds to what you’ve already built. And once you’re looking at a 23-day ComboLoop, breaking it suddenly feels a lot harder. The idea is simple: make consistency feel worth protecting. A TRACKER THAT CELEBRATES PROGRESS • Complete a habit and stamp the day with a small, satisfying ritual • Give every habit its own vivid colour and personality • Reach milestones like 7, 30, 100 and 365 days • Earn collectible tokens that stay with you even if a streak ends • See where you are, what’s next, and how close your next milestone is • Celebrate achievements with shareable milestone cards, or keep them private BUILT FOR REAL LIFE • Start in seconds with guided habit ideas or create your own • Track habits daily or only on selected days • Build a habit or track something you’re trying to quit • Add reminders and notes when you need them • Use pause days when life gets in the way • Track anything from walking and reading to less scrolling, language practice, or your own routine SEE YOUR PATTERNS • Discover completion trends • See your best streaks and milestones • Find your strongest days of the week • Learn what time of day you’re most consistent • View a detailed calendar for every habit • Keep your past achievements and collected tokens ON IPHONE AND APPLE WATCH • Interactive Home Screen widgets let you complete habits without opening the app • View and complete habits from Apple Watch • Apple Watch complications keep your progress visible throughout the day • iCloud keeps Combo in sync across your Apple devices PRIVATE BY DEFAULT No account. No sign-up. Your habits stay on your devices and in your personal iCloud. Start small. Build something you won’t want to break. Keep the ComboLoop going.