Caffeine Clock: Track Caffeine

COFFEE, TEA & ENERGY – TRACK YOUR CAFFEINE AND SLEEP BETTER

Caffeine Clock is a caffeine diary designed for coffee, tea, and energy drink lovers who want to sleep well and stay in control. Log your drinks, see how caffeine is absorbed and eliminated, and plan your last cup so you can rest easy.

SMARTER TRACKING WITH SCIENCE-BACKED MODELLING
Caffeine Clock doesn’t just count cups. It models how quickly you absorb caffeine and how your body clears it (half-life), giving you a live estimate of your current and future levels. If you sip slowly, the curve adapts in real time.

SEE YOUR CAFFEINE CURVE
A clear, interactive graph shows your current level and predicts when you’ll be back in the clear. Scrub the timeline for exact values, and instantly know if another drink will push you over your limit.

QUICK-ADD WIDGETS
Check your caffeine stats and log drinks straight from your Home Screen with handy widgets. Tracking your intake is effortless.

SLEEP-AWARE GUIDANCE
Set your bedtime, and Caffeine Clock will warn you if your caffeine will still be in your system. Get notified before you add a drink, so you can adjust your cut-off and protect tonight’s sleep.

PERSONALISED TO YOU
Onboarding captures your habits and sensitivity, and you can set your own caffeine half-life. The app adapts to your body, not the other way round.

220+ DRINKS, OR ADD YOUR OWN
Choose from coffees, teas, energy drinks, or create your own custom drinks. Fast logging means you never miss a cup.

SET LIMITS AND GET GENTLE REMINDERS
Pick a daily caffeine threshold (including pregnancy-safe options), and get a nudge before you go over. Stay in control, without nagging.

APPLE HEALTH & HEALTH CONNECT
Sync your caffeine logs to Apple Health or Health Connect, so your intake sits alongside your sleep and wellbeing data.

PRIVATE, OFFLINE, AND ACCOUNT-FREE
Your data stays on your device. No sign-up, no cloud. Transfer locally if you wish – Caffeine Clock works anywhere, anytime.

BUILT FOR EVERYDAY LIFE
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.

HOW IT WORKS
- Log a drink from the 220+ database or add your own
- The app models absorption and half-life to estimate your levels
- Watch your live caffeine curve and countdown
- Set a bedtime and get notified if you might still be caffeinated

WHY USE A CAFFEINE TRACKER?
Caffeine affects everyone differently. Caffeine Clock helps you time your intake for better days and restful nights.

DISCLAIMER
Caffeine Clock is not a medical device and does not diagnose, treat, cure, or prevent any medical condition.
Every figure in the app is an estimate based on published half-life ranges and your inputs, not a measurement.