CaffSense: Caffeine & Sleep

Love coffee. Sleep better anyway. CaffSense shows the caffeine in your body right now on a live half-life curve — and the exact time to stop so it's out of the way by bedtime. Then it goes further: by quietly comparing your caffeine timing with your Apple Health sleep, CaffSense learns how your body clears caffeine — faster or slower than the textbook 4 hours — and tunes your curve and cutoff to match you. • Live "caffeine on board" gauge & curve • Your personal cutoff time • One-tap logging, widget & Apple Watch • Sleep-pattern insights from Apple Health • Shift Mode for early, late and night shifts **Working shifts?** Turn on Shift Mode and pick early, late or night. CaffSense moves your cutoff to the sleep window that actually follows your shift — not a fixed evening bedtime. It still uses your own logged intake and your learned half-life, so the time is yours, not a generic rule of thumb. Private by design: everything stays on your iPhone. No account, no tracking, no ads. Free: today's curve & cutoff. Pro: full history, personal half-life & sleep insights. Not medical advice. Patterns are observational and may be affected by stress, alcohol, exercise, illness, medication, and data quality. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://caffsense.com/privacy