half-lyfe: Caffeine Coach
Know your caffeine cutoff
About
This app helps you plan your caffeine intake to align with your energy needs and bedtime. Log drinks, preview their effects, and schedule them around your day with optional calendar integration. Track your history and receive timely reminders.
What's New in half
1.1.1
October 14, 2026
A fresh look for your everyday caffeine check-ins: • Redesigned Apple Watch screens with a clearer caffeine ring and portion controls. • Refreshed widgets and Live Activities that match the app. • Updated guides for setting up quick logging. • Optional analytics sharing, with controls to turn it off and request deletion in Profile. Caffeine levels and timing remain estimates.
MoreSubscriptions & In-App Purchases
half-lyfe Pro (Yearly)
Plan caffeine, preview drinks and track your habits.
FAQ
What is half-lyfe?
half-lyfe is a Health & Fitness app that helps you log and plan your caffeine intake to manage energy levels and bedtime. It provides estimated caffeine levels in your system and projects their impact on your chosen bedtime.
Does half-lyfe have ads?
No, half-lyfe does not contain advertisements. The app is free to download and use with optional premium features available through a subscription.
What are the subscription options for half-lyfe Pro?
half-lyfe Pro offers monthly and yearly subscription plans. The yearly plans include a 14-day free trial. Pricing varies by plan, with specific details shown before purchase.
Can I sync half-lyfe with my calendar?
Yes, half-lyfe offers optional integration with your iPhone calendars to help you plan caffeine intake around your schedule. Google calendars can be used when synced into Apple Calendar.
How accurate are half-lyfe's caffeine projections?
Caffeine amounts, finish-by times, and bedtime projections are estimates and not measurements or guarantees of sleep or performance. The app is intended for general wellness and not as medical advice.
Is half-lyfe suitable for teenagers?
half-lyfe has an age rating of 12+. For ages 13-17, the app includes lower caffeine intake limits and no energy-drink recommendations, though these are not an endorsement of teen caffeine use.
How often is half-lyfe updated?
The latest version of half-lyfe is 1.1.1, which was last updated on October 14, 2026. Updates typically include new features, bug fixes, and performance improvements.
Can I use half-lyfe on my Apple Watch?
Yes, half-lyfe supports both iPhone and Apple Watch, allowing you to log drinks and manage your caffeine intake conveniently across devices.
