CaffSense: Caffeine & Sleep

See how caffeine affects YOUR sleep. Log every cup, uncover your caffeine-to-sleep pattern, get a personal evening cutoff and recovery signal. On-device.

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

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