Here’s what this app does
Caffeine Curfew logs drinks and models remaining caffeine using adjustable half-life assumptions and sensitivity settings. It offers widgets, Live Activities, Apple Watch controls, and Apple Health integration. An Apple Intelligence-based coach is advertised for supported devices.
The download is free, with Pro purchases currently listed at $1.99 monthly, $9.99 yearly, or $19.99 lifetime in the U.S. store. Optional support tips are separate. Free-tier limits are not clearly documented, but the lifetime option avoids recurring payments.
The displayed caffeine level is an estimate, not a measurement of blood caffeine or a reliable prediction of when someone can sleep. Individual responses vary. The June 2026 release and exact store identity were confirmed.
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