Know what's still in your system
A live caffeine level based on your personal half-life, with 21 built-in drinks plus custom entries and adjustable serving sizes.
See how coffee affects your sleep.
Doppio estimates how much caffeine is still in your system right now, how it fades over the hours ahead, and which cup you can still have before bed.
Download on theApp Store
Free on iPhone and iPad · iOS 18 or later
Everything a coffee lover needs to sleep well
Log a drink in a tap. Doppio does the math on a metabolism curve tuned to you.
A bedtime forecast
See your estimated level at bedtime and what you can still drink before it, with a clear explanation of how it's worked out.
Caffeine beside your sleep
Bring in sleep from Apple Health, rate how you slept, and see how your nights change on high- and low-caffeine days.
Tuned to your metabolism
A short questionnaire estimates your caffeine sensitivity, and your half-life then drives every chart, widget and forecast.
Brew like a pro
A caffeine and ratio calculator for 11 methods, from French press to a La Pavoni lever, plus a brew timer on the Lock Screen and Dynamic Island.
Always at hand
Home Screen and StandBy widgets, Control Center quick log, Siri and Shortcuts, and iCloud sync across iPhone and iPad.
Take a look
Free to start. Pro when you want more.
Doppio
Free
- Caffeine logging and live level
- Bedtime suggestion on Home
- History for the last month
- Brew calculator and timer
- Small widget, Siri and Control Center
- Apple Health and iCloud sync
Doppio Pro
Yearly or lifetime
- Caffeine insights, your last-coffee time and a Last Call reminder
- Full history, every day you've logged
- Caffeine & sleep insights
- Guided 7–30 day detox plans
- Save more brews (your first is free)
- Coffee shelf with photos and ratings
- Five extra themes and larger widgets
Doppio Pro is available as a yearly subscription or a one-time lifetime purchase. Prices are shown in the App Store.
Your data, on your devices
Your caffeine log, coffee shelf and saved brews stay on your device and in your private iCloud. Apple Health sync is opt-in and under your control. Anonymous usage analytics never include your caffeine logs, health samples or notes.
About the numbers
Caffeine figures are estimates from a standard half-life model, adjusted by your answers during setup, not measured from your body. Doppio is not a medical device and does not give medical advice.
Have your coffee. Keep your sleep.
Download on theApp StoreAvailable in English, German, Spanish, French, Italian, Dutch, Portuguese, Japanese, Korean, Turkish and Serbian.