Caffeine Health
Track your caffeine. Protect your sleep. Real-time pharmacokinetic curves.
Screenshots
Description
Caffeine Health is a beautifully designed Android app that helps you understand how your caffeine intake affects your body throughout the day — and whether that late-afternoon espresso might cost you sleep tonight.
Log drinks from a curated catalog, watch your active caffeine level in real time on a 24-hour curve, and get a personalized sleep forecast based on your unique metabolism.
Features:
• Real-time 24-hour caffeine curve with emoji drink markers
• Personalized pharmacokinetic modeling based on age, weight, lifestyle
• Sleep forecast — see if caffeine will affect your bedtime
• Curated drink catalog: coffee, tea, energy drinks, soda
• Barcode scanning, live or from a photo, with an optional Open Food Facts lookup
• Typo-tolerant drink search and tea re-steep tracking
• Drink detail sheets showing individual contribution curves
• Quick actions — edit, duplicate, or delete entries
• Analytics: caffeine by source, bedtime impact, and when you drink it, hour by hour
• Home screen widgets, reminders, and automation via Tasker, MacroDroid or NFC tags
• Material 3 Expressive design with dynamic color
• Montserrat typography and haptic feedback throughout
• Full dark mode support
Privacy:
• Works fully offline — all your data stays on your device
• The internet is only used if you choose to look up a scanned barcode on Open Food Facts, and only the barcode number is sent
• No ads, no tracking, no telemetry, no accounts
• Open source (GPL-3.0)
Science:
The app uses a one-compartment oral pharmacokinetic model with personalized half-life calculation. Your caffeine metabolism is estimated from age, weight, smoking status, alcohol intake, and CYP1A2-inhibiting medications — grounded in real pharmacology.
What’s new (2.5.0)
- Scan drinks by barcode, live or from a photo. Unknown drinks can be looked up on Open Food Facts, only if you agree; this is the only time the app uses the internet
- Redesigned Analytics: a dashboard coloured per range with rolling numbers, caffeine by source as one bar, and an hour-by-hour "When you drink" chart
- Search that forgives typos
- Log the 2nd or 3rd+ steep of a tea
- Redesigned, resizable widgets
- Frosted glass toolbar (Settings > Appearance)
- Updated translations
Versions
Permissions
What the app asks the system for. Android only grants sensitive access after you confirm it.
- health.WRITE_NUTRITION
- health.READ_NUTRITION
- health.READ_SLEEP
- health.WRITE_HYDRATION
- NotificationsShow notifications.
- Run at startupStart automatically after the device is switched on.
- CameraTake photos and videos.
- Internet accessSend and receive data over the internet.
Show 4 more permissions
- Prevent sleepingKeep the device from going to sleep.
- Network stateCheck whether and how the device is connected.
- Foreground serviceKeep running in the background, visible in the status bar.
- caffeine.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
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