CaffeineHalf: Caffeine Tracker

Track your caffeine intake and see exactly how much will remain in your system at bedtime — based on the pharmacokinetic half-life model (approximately 5-6 hours). Features: - Auto-calculate caffeine from drink type - Half-life based residual caffeine prediction - Set bedtime for countdown estimation - Time-decay graph visualization - Custom drink registration - Daily intake history Great for: - People sensitive to caffeine's sleep effects - Anyone improving their sleep quality - Optimizing caffeine timing for productivity - Managing intake during pregnancy or nursing Based on pharmacokinetic half-life modeling — goes beyond simple intake counters to predict actual residual caffeine levels. Your caffeine records stay on your device. FREE VERSION AND FULL ACCESS The free version displays banner ads. A one-time Full Access purchase unlocks every feature and removes ads. Customers who previously bought the paid app also continue without ads.