Caffinity: Caffeine Tracker

Caffinity is a clean, lightweight caffeine tracker built for people who want more than a daily total.

Log coffee, tea, energy drinks, or custom caffeine amounts, then see how your caffeine levels may change across the hours that follow. Caffinity models absorption, active caffeine, alertness states, wear-off timing, and tolerance in one calm, easy-to-read interface.

Track caffeine without the clutter.
Caffinity helps you:
• Log built-in drinks by type and size, or enter a custom caffeine amount
• See your active caffeine level
• Follow caffeine-driven alertness states
• Track your caffeine tolerance over time
• Review daily totals against your selected limit
• Check calendar history and past intake by day
• Create custom drinks and serving sizes
• Set optional caffeine wear-off reminders

A simple app with a deeper model.
Caffinity uses a modeled caffeine system instead of acting as a basic counter. Each drink is treated as its own dose, with an absorption phase before full effect and a half-life decay model after that. Multiple drinks stack over time, and tolerance can make stronger alertness states harder to reach.

Private by design.
Caffinity works locally on your device. No account is needed, and your caffeine logs stay on your device.

Made for daily use.
Whether you are logging a morning espresso, afternoon tea, or a pre-workout energy drink, Caffinity helps you understand your caffeine timing with clear, practical estimates.

Caffinity provides modeled, informational guidance based on your logged intake and timing. It is not a medical app and should not be used as medical advice.