BrewMeter vs Halvo

Read the label, log what you drink. BrewMeter is a private caffeine journal with configurable estimates. YOUR PRODUCT, YOUR PORTION Copy caffeine from your exact product label: mg per serving or mg per 100 mL. Save a custom drink, then log the volume you actually drink in mL, US fl oz or UK fl oz. See the conversion before saving. Added water does not add caffeine. Reuse favorites in one tap and undo an accidental log. A JOURNAL YOU CAN CORRECT Choose the time and serving amount, correct earlier entries, and explicitly record a caffeine-free day. Missing days stay unknown. Updating a drink’s label keeps the caffeine amounts of earlier entries. FREE DAILY TOOLS Unlimited logging, an estimated caffeine curve, the what-if simulator, widgets, Siri/Shortcuts and 30 days of history are free. The model uses your chosen half-life and caffeine threshold. It does not measure your metabolism or predict sleep. LOOK BACK WITH PRO Explore a clearly labeled 14-day example before choosing Pro. Pro adds your own 14-day intake trend, history beyond 30 days, CSV export and comparisons of recorded caffeine with sleep duration from Apple Health. These show associations, not medical conclusions. Pro is one purchase with no subscription. Existing Pro and grandfathered access remain recognized. PRIVATE BY DESIGN No account, ads or tracking. App-created records can sync through your private iCloud. Optional HealthKit access remains under your control; read sleep samples are not copied into iCloud. BrewMeter provides estimates for personal awareness, not medical advice. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://bnjdpn.github.io/BrewMeter/privacy.html

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.