Caffeine Tracker: Sleep & Log

ow much caffeine is in your body right now — and what time should you stop to sleep tonight?

Caffeine Tracker logs what you drink and shows your live caffeine level using a half-life model, so you can watch it rise and fall through the day. Unlike daily-limit apps, it also works backward from your bedtime to tell you the last time to have caffeine and still sleep well.

HOW IT WORKS
- Log a drink in two taps — pick from the built-in list, set the number of cups.
- Watch your live level on the home gauge and see when it clears.
- Get your last recommended time to have caffeine before bed.
- Rate your sleep and learn how caffeine affects your nights.

FEATURES
- Live caffeine gauge powered by a half-life model
- Bedtime cutoff — the last time to have caffeine before sleep
- Two-tap logging with a cups slider (0.5, 1, 1.5 ...)
- Built-in drink list — coffee, tea, soda, energy drinks and more
- Add your own drinks and set their caffeine in mg
- History and weekly charts to spot your patterns
- Caffeine vs sleep insight — compare intake on good and bad nights
- Daily limit gauge (default 400 mg, adjustable)
- Korean and English

PRIVATE BY DESIGN
- Works fully offline. Your data stays on your device.

WHO IT IS FOR
- Anyone sensitive to caffeine who wants better sleep
- People cutting back or watching their daily intake
- Coffee and energy drink lovers who like seeing their data

Caffeine tracker, coffee tracker, caffeine intake and half-life — open, log, done.

Track your caffeine, protect your sleep. Start today.