Caff: Caffeine & Sleep Tracker

Know exactly how much caffeine is in your system. Right now, and at bedtime.

Caff tracks your caffeine intake and models how it decays in your body using a scientifically-based half-life formula. Log a coffee in seconds, then watch the burndown chart show you your caffeine curve for the next 12 hours.

SLEEP SMARTER
Set your bedtime once. Caff calculates how much caffeine will still be in your system when you try to sleep, estimates how many minutes of sleep you'll lose, and shows you a "Last Call" time, the latest you can safely drink caffeine tonight.

TRACK YOUR INTAKE
• Preset drinks: coffee, espresso, tea, energy drinks and more
• Create custom drinks with a name, emoji, and mg amount
• Personal daily caffeine limit with a live progress bar
• Full history grouped by day, swipe to delete

5 HOME SCREEN WIDGETS
Summary · Burndown chart · Sleep forecast · Today's log · Weekly chart, all updating live from a shared data container.

APPLE HEALTH
Every entry is written to Apple Health as dietary caffeine. Delete an entry in Caff and the Health sample is removed too. No reads, your Health data stays private.

100% PRIVATE
No account. No cloud. No data collection. Everything lives on your device.