Caffeine Clock vs Brew Clock

Stop guessing why you can't sleep. Caffeine Clock uses advanced half-life modeling to show you exactly how much caffeine is still in your system—long after your last cup. Most people don't realize that up to 25% of their morning coffee is still active at bedtime. Caffeine Clock visualizes this hidden energy, helping you find your perfect "cutoff time" for better rest and consistent focus. KEY FEATURES: Real-Time Half-Life Graph See your active caffeine decline hour by hour. Know exactly when you'll be clear. Smart Sleep Alerts Get notified if a late latte puts your sleep at risk. We calculate the impact based on your personal bedtime. Personalized Metabolism Everyone processes caffeine differently. Customize your half-life sensitivity to match your body. Focus vs. Jitter Zones Stay in the productive "Focus Zone" and avoid the anxiety-inducing "Wired Zone" with clear visual thresholds. Live Widgets Monitor your status right from your Home Screen and Lock Screen without opening the app. WHY CAFFEINE CLOCK? Free: No paywalls, no subscriptions. Private: All data stays on your device. No accounts, no tracking. Simple: Just tap to log. We handle the math. Take control of your daily rhythm. Download Caffeine Clock today and sleep better tonight.

Avoid energy slumps, crashes, and poor sleep by timing your caffeine intake better. Avoid drinking coffee too early or too late with BrewClock! Features: - shows when your cortisol level has dropped to an appropriate level to drink caffeine in the morning - shows the latest time you should drink coffee in the afternoon without affecting your sleep - optional notifications to keep your caffeine schedule on-track - imports wake and sleep data from Apple Health automatically, or manual setting is available if preferred.