Caffeine Curve vs Halvo

Caffeine Curve helps you track your estimated caffeine level in real time. Using your dietary caffeine entries from Apple Health, the app estimates how much caffeine may still be active in your body throughout the day. It uses an absorption and elimination model to give you a more useful picture than intake alone. It is designed for a simple purpose: to give you the most useful caffeine information quickly and clearly. Whether you are deciding on another coffee, trying to stay in a good range for focus, or avoiding caffeine too close to bedtime, Caffeine Curve helps you understand where you stand right now. Features - Track your estimated current caffeine level - See how your caffeine level changes throughout the day - Reads dietary caffeine data from Apple Health - Check your current level from the Lock Screen widget - Understand how long caffeine may remain active - Clean, simple interface designed for quick checks - Rich Home Screen Widgets: Keep an eye on your caffeine levels and daily trends without even opening the app, featuring beautiful charts and gauges - Smart Complications: New rectangular and dial-top complications clearly show the exact time of your next peak or when you’ll be clear for sleep. - Useful Notifications: Get pinged exactly when you hit your caffeine peak or when your system drops below your personalized sleep-ready threshold. - Peak & Sleep Indicators: Know exactly when your coffee hits its peak and precisely when you are cleared for a good night's sleep - Unmatched Personalization: Choose from 5 different sensitivity profiles to perfectly match your unique body chemistry and caffeine decay rate - Try It Demo Mode: Explore the app's full capabilities and stunning visual charts using sample data before committing to logging your own - Beautiful & Customizable Design: Experience a gorgeous new "Liquid Glass" aesthetic that feels right at home on iOS, plus full control over Light/Dark modes and all-new tinted app icons. Caffeine can be logged automatically by other apps that write to Apple Health, or added manually in the Health app under Nutrition > Caffeine. Caffeine Curve is free to use, with no ads and no in-app purchases. It was built from a real daily need: a simple way to understand caffeine levels clearly, quickly, and without unnecessary extras. Important Individual caffeine metabolism varies. Factors such as genetics, liver health, medications, and pregnancy can affect absorption and elimination. Caffeine Curve is for informational purposes only and does not provide medical advice.

Your last coffee decides your night. Halvo shows you how much caffeine is actually working in you right now — and tells you the point after which the next cup starts costing you sleep. Your personal cut-off. Most caffeine apps count milligrams. Halvo works with the caffeine that actually reaches your system: it rises, peaks and fades. Halvo predicts how much of it is still there when you go to bed. YOUR PERSONAL CUT-OFF Everyone clears caffeine at a different speed. Halvo shows you the latest you can have a cup without too much of it still active when you fall asleep. LOG IN SECONDS Add coffee, espresso, tea, energy drinks, soda, mate or your own pre-workout in a few taps. Halvo sums it up automatically and shows how much is still working. ON YOUR HOME SCREEN AND ON YOUR WRIST The widget shows your level and your cut-off without opening the app — one tap logs your favourite drink. In the evening it switches to "lights out" on its own. Plus Apple Watch with a complication for a glance-and-go check. SEE YOUR CURVE Watch caffeine rise, peak and fade on a real concentration curve — and see exactly where you'll land when your head hits the pillow. A MODEL THAT LEARNS YOU — HONESTLY (PRO) With your permission, Halvo reads your sleep, heart rate and HRV from Apple Health and learns your personal caffeine half-life over time. Here's what makes it different: when the signal in your data is too weak to be sure, Halvo says so and keeps using the population value — instead of faking precision it doesn't have. WORKS WITH YOUR WEARABLES (PRO) Apple Watch, Oura, Whoop, Garmin — anything that syncs sleep and heart data to Apple Health. Halvo never connects to those services directly; it only reads what's already in Apple Health. PRIVATE BY DESIGN Your intake and health data are processed on your device. Halvo doesn't sell your data. FREE & PRO Logging caffeine, seeing your curve, using the widget and finding your cut-off are free. Halvo Pro adds the personal learning model and the nightly sleep analysis. Halvo Pro: • Monthly – $3.99 • Yearly – $24.99 (with 1 month free) • Lifetime – $44.99 one-time (no subscription) Payment is charged to your Apple Account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Lifetime is a one-time purchase. Prices may vary by region. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://halvo.jnmcloud.de/privacy.html Halvo is not a medical device and does not diagnose, treat or prevent any condition. It helps you make more informed choices about caffeine.