Caffeine Clock vs Nicotine Tracker

Track your caffeine and sleep better. See exactly when today's coffee wears off. Caffeine Clock is a caffeine tracker that models absorption and half-life to estimate how much caffeine is in your system throughout the day. Log what you drink or eat, see how levels rise and fall, and plan your last cup so you can sleep with confidence. Accurate tracking with absorption rate Not just totals. Caffeine Clock models how quickly you absorb caffeine and how it declines (half-life), then estimates your level now and later. If you note how long you sipped that cappuccino, the curve updates accordingly. A clear, actionable dashboard An attractive graph shows your current level, projected decline, and how much caffeine you'll have at any time. Long-press to scrub the timeline and reveal exact values. At a glance, know whether you're in the clear - or whether another cup will push you past your comfort zone. Interactive Home Screen Widgets Monitor your stats without even opening the app. View your live caffeine curve and current mg count directly on your Home Screen. Need to log a refill? Use the quick-add widget to track your favorites with a single tap - keeping your data accurate with zero friction. Sleep-aware insights Set a target bedtime. If your projected level looks high by then, Caffeine Clock lets you know early, often before you even add a drink, so you can adjust your cut-off and protect tonight's sleep. Tuned to you A quick setup captures your habits and sensitivity, and you can adjust your personal caffeine half-life at any time in Settings, so the curve matches how your body actually clears caffeine. 200+ drinks, plus your own Choose from a built-in database of coffees, teas, and energy drinks, or create custom drinks with your own sizes and mg. Fast logging means better tracking. Thresholds and gentle alerts Pick a daily caffeine limit that fits your routine, whether that is the commonly cited 400 mg for adults or the 200 mg guideline many people follow during pregnancy. Get timely reminders before you overdo it. Apple Health Send every logged drink to Apple Health so your caffeine sits next to your sleep and the rest of your health data. Private and fully offline No account, no signup. Your data stays on your device, with an option to transfer locally. Caffeine Clock works fully offline. Anytime, anywhere. Made for everyday routines Whether it's espresso at 8, tea at 2, or an energy drink before a workout, Caffeine Clock shows how today's choices affect tonight's sleep, so you can enjoy what you love without second-guessing it. How it works - Log a drink from the 200+ library or use the quick-add widget. - The app models absorption and half-life to estimate your level over time. - Watch the live caffeine curve and countdown on the dashboard or Home Screen. - Set a bedtime and get informed if you may still be "too caffeinated" by then. Why a dedicated caffeine tracker? Caffeine affects everyone differently. A general health app won't tell you when a 3 PM latte will still be in your system at 10 PM. Caffeine Clock focuses on one job: timing your intake for better days and better nights. Get started in minutes Install, finish the onboarding, log your first drink, and watch your caffeine curve come to life. Disclaimer Caffeine Clock provides estimates based on published half-life ranges and your inputs. It's for informational purposes only and is not a medical device or a substitute for professional advice.

Track blood nicotine levels in real time, whether you're a heavy user, cutting back, or working toward cessation. NicTracker estimates how much nicotine is in your bloodstream using a pharmacokinetic model. The app calculates absorption and clearance based on the product you log, your body weight, and your personal metabolism settings, then updates a live gauge as the level rises and falls throughout the day. The following product types are each modeled with their own release and absorption curve: Cigarettes and cigars Vapes and hookah Nicotine pouches (Zyn, Velo, and other brands) Snus, gum, lozenges, and patches Reducing your intake or moving toward smoking or tobacco cessation starts with seeing the pattern behind it. The Insights tab (one-time purchase) analyzes your logged data for usage trends, recovery scoring between doses, and a circadian breakdown of when cravings tend to hit. The Home screen spacing timer helps you space out use and build toward a new habit, one interval at a time. Other things NicTracker does: Logs a dose in under ten seconds, with retroactive entry if you forget to log in the moment Shows a full-day blood curve chart with a forward projection of expected clearance Tracks total intake and product use across daily, weekly, monthly, and yearly views in the History tab Adds Home Screen widgets for daily use, a 6-hour forecast, and your current blood nicotine level Exports your logged data and blood curve as a PDF or CSV for any date range All calculations run on-device. No data is transmitted externally. NicTracker is an informational self-monitoring tool. It does not diagnose nicotine addiction or provide medical advice, and it is not a substitute for a detox program or clinical support. Download NicTracker and log your first dose in under ten seconds.