Caffeine Clock

TRACK YOUR CAFFEINE - AND IMPROVE YOUR SLEEP

Caffeine Clock is a caffeine tracker that provides accurate tracking, translating into better decision making for your life. Log what you drink or eat, see how caffeine is absorbed and cleared over time, and plan your last cup so you can sleep soundly.

ACCURATE TRACKING WITH ABSORPTION RATE CALCULATION

Not just totals. Caffeine Clock models how quickly you absorb caffeine and how it declines (half-life), then estimates how much is in your system right now - and later in the day. You can even set how long you've drank that cappuccino - and it updates correctly.

BEAUTIFUL, ACTIONABLE DASHBOARD

A clean, attractive graph on the dashboard shows your current level, projected decline, and how much caffeine you'll have at any time. Long press to scrub through the graph to show the correct values! At a glance, you’ll know if you’re in the clear or if another cup will push you past your comfort zone.

CONVENIENT HOME SCREEN WIDGETS

Monitor your status without even opening the app. Glance at your current caffeine number and the decline graph right from your home screen to stay informed. Plus, log your favorite drinks instantly with one-tap quick-add widgets. Tracking has never been faster.

SLEEP-AWARE INSIGHTS, WHEN THEY MATTER

Set your target bedtime. If your projected level is calculated to be high when you go to sleep, Caffeine Clock lets you know early, before you even add a drink - so you can adjust your cut-off time and protect tonight’s sleep.

COMPREHENSIVE, TAILORED ONBOARDING

Start strong with a quick setup that captures your preferences and sensitivity. Of course, you have the ability to set them however you like.

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, ALERTS, AND COACHING

Pick a daily caffeine threshold that fits your routine. Get gentle alerts before you overdo it and suggestions that keep you on track.

FULLY OFFLINE AND PRIVATE BY DESIGN

No account, no signup, no cloud. Your data stays on your device, with the option to transfer it via local network. Caffeine Clock works fully offline.

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 add a custom drink

The app models absorption and half-life to estimate your level over time

See the live caffeine curve and countdown on the dashboard or your home screen widget

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 — helping you time 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. Make smarter choices today—and sleep with confidence tonight.

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.