Kafi

An offline caffeine tracker for logging intake and visualizing how caffeine levels change through the day.

Technology stack

Expo / React Native / TypeScript / NativeWind / AsyncStorage

Provides one-tap drink presets, custom caffeine entries, and a metabolism curve with bedtime and peak markers.

Includes weekly intake trends, a history ledger, CSV export, and local settings. Data stays on the device without an account or server.

More projects