Caffeine Cutoff Mate

Caffeine Cutoff Mate helps you decide when today's last coffee should be. Enter your usual bedtime, caffeine sensitivity, and each drink you consume, then the app estimates how much caffeine may remain at bedtime using a simple half-life model. It includes quick logging, a caffeine fade chart, daily history, statistics, and local curfew notifications. No account, ads, analytics, or developer-operated server is used.