Koffee vs Mr. Caffeine

Stop guessing when caffeine leaves your body. Koffee uses a real pharmacokinetic model to show your exact caffeine level in real time — not estimates, not averages. A smooth half-life decay curve tracks every milligram from your morning espresso to your afternoon latte, showing you precisely when you'll be sleep-ready. WHY KOFFEE Most caffeine trackers count milligrams. Koffee shows you the science. The half-life curve visualizes how caffeine metabolizes in YOUR body based on your weight, metabolic speed, and lifestyle factors. Optional cortisol bands show the natural rhythm your body follows — so you can time your coffee for maximum effect. TRACK EFFORTLESSLY - One-tap Quick Log with 10 presets and custom drinks - 50+ branded drinks from Starbucks, Dunkin', Costa, McCafe - Dynamic Island shows your level without opening the app - Home Screen and Lock Screen widgets - Smart Last Call alarm before your cutoff time PROTECT YOUR SLEEP - Real-time countdown to when you're safe to sleep - Sleep Impact Score (0-100) based on caffeine timing and HealthKit data - Sleep Simulator: "What if I skip the afternoon coffee?" - Sleep correlations with HealthKit heart rate and deep sleep data - Personalized cutoff based on YOUR bedtime and metabolism UNDERSTAND YOUR PATTERNS - Caffeine Persona: discover your archetype (Early Bird, Night Owl, Rocket...) - Yearly heatmap with 365 days of caffeine history - Tolerance Tracker with 4-week rolling trends - Weekly Report with actionable insights - Koffee Wrapped: your year in review, shareable PERSONALIZED TO YOUR BODY - 3 metabolic speeds: slow, normal, fast - Body model: weight, smoker, oral contraceptives, pregnancy - Custom daily goals with streak tracking - 16 themes from Oat Milk to Espresso PRICING Free tier includes full caffeine tracking, curve, countdown, Dynamic Island, Quick Log, and 4 widgets. Unlock Koffee Insights for sleep intelligence, deep analytics, premium widgets, and personalization. - Monthly: $1.99/mo - Annual: $9.99/yr (3-day free trial) - Lifetime: $19.99 (one-time, yours forever) No ads. No data selling. Your health data stays on your device. Terms of Use: https://www.koffeecaffeinetracker.app/terms Privacy Policy: https://www.koffeecaffeinetracker.app/privacy

That afternoon espresso might still be affecting you at midnight. Caffeine has a half-life of about 5 hours, but most people never think about what that means for their body. Mr. Caffeine does the math for you. Log your coffee, tea, or energy drink with a single tap. Mr. Caffeine calculates how much caffeine is still in your system in real time and shows you how it affects your energy, focus, and sleep. HOW IT WORKS Caffeine doesn’t disappear after your last sip. It stays in your system and fades over time. Mr. Caffeine tracks this process using a caffeine half-life model, showing you a clear decay curve throughout the day. You’ll always know where you stand and whether that next cup is worth it. FEATURES · One-tap caffeine logging, espresso, latte, americano, cold brew, energy drinks, and more · Real-time caffeine level, see exactly how much is still in your system · Sleep time estimate, know when your body will be ready for bed · Decay curve, visualize how your caffeine drops hour by hour · Home Screen widgets, check your caffeine level and sleep time without opening the app · Smart notifications, cutoff reminders, daily limit alerts, and sleep warnings · 15 themes, customize the app and widget to match your style · 7 alternate app icons, pick the one that fits your Home Screen · Bedtime and sensitivity settings, personalized to your sleep schedule WHY MR. CAFFEINE Most caffeine trackers give you numbers and charts. Mr. Caffeine gives you a clear answer: can I sleep yet? The interface is simple, two screens, no clutter. Log your drinks, see your status, check the widget. That’s it. Whether you’re trying to improve your sleep, stabilize your energy, or just understand how caffeine affects your day, Mr. Caffeine makes it effortless. Download Mr. Caffeine and stop guessing. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://igodia.dev/privacy-mrcaffeine