Cafactor vs Caffie

Caffeine Hourglass is now Cafactor — rebuilt from the ground up. What began as a simple caffeine timer has evolved into a full physiological model that adapts to your biology in real time. Version 2.0 isn't an update. It's a new category of health tool. Know your caffeine. Protect your sleep. Log a drink in seconds. Cafactor computes your real-time caffeine curve using a peer-reviewed pharmacokinetic model — complete with a realistic absorption phase, first-order decay, and your personal biological parameters. See whether you can safely have one more coffee, and exactly when your levels will drop below your personal sleep threshold. Personalised to your body Set your sex, height, weight, and age. Cafactor applies the Boer (1984) lean-body-mass formula to calculate how caffeine distributes in your specific body. Add smoking status, hormonal medication, or pregnancy for a half-life that's truly yours. Your tolerance to caffeine — derived automatically from 7-day history — rounds out the picture. HealthKit: exponentially smarter Connect Apple Health and Cafactor transforms from a tracker into an adaptive metabolic coach: • Exercise modifier — Recent vigorous workouts temporarily speed up your metabolism. Cafactor detects this from HealthKit and adjusts your decay curve automatically. • Sleep-adaptive threshold — Last night's poor sleep tightens your safe window today. Great sleep? More room for your morning ritual. • HRV & Recovery (Apple Watch) — Daily heart-rate variability fuses with sleep quality to create a PhysiologicalState score, shifting your optimal intake windows and adjusting thresholds by up to 40%. • Progressive calibration — Recency-weighted regression over 30 days of sleep and HRV feedback automatically refines your personal half-life, growing from Preliminary to Reliable confidence as data accumulates. Pro features Unlimited history · Trend, sleep quality and scatter charts · Last safe caffeine time · Four smart notifications (morning window, safe window, withdrawal, recovery) · Shareable weekly report · Siri shortcuts · Unlimited custom drinks Free, forever, offline Core tracking is always free. No account. No internet. No data leaves your device — ever.

Make caffeine your ally for peak performance and deep sleep. An intuitive tracker app that accurately simulates your "current caffeine levels" and exactly "when it will clear" from your system. Coffee and energy drinks are amazing tools for boosting focus, but consuming them at the wrong time or in the wrong amounts can severely degrade your sleep quality at night. With Caffie, you can see at a glance when caffeine will leave your body, allowing you to plan the perfect time to relax. [Core Features] • Real-Time Level Display: Visualize your naturally decreasing caffeine levels over time with an intuitive graph. • Smart Insights: Receive precise advice based on your current levels, such as "Optimal alertness" or "Avoid further intake." • Clearance Prediction: Automatically calculates the time until your caffeine level "down to adequate level" and "reaches near zero." • Simple Logging: Intuitively log your drinks with a single tap. [Caffine Pro (Premium Features)] Unlock all features permanently for the price of a single cup of coffee. • Home Screen Widget: Check your current caffeine levels anytime without opening the app. • All-Time History Data: Look back at all your past records and analyze your caffeine habits. • Unlimited Custom List: Add your frequently consumed drinks without any limits. *Disclaimer The calculations for half-life and remaining body levels provided by this app are estimates based on general scientific data. They are not intended to provide medical advice. Please consult a medical professional for accurate judgments regarding your health. Caffine is a smart tracker that visualizes your remaining caffeine levels in real time and supports optimal caffeine control. Since you can also check your daily caffeine intake history, you can thoroughly manage your caffeine with just this one app.