Halvo vs Sunfold

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.

Sunfold is a quiet, warm intermittent fasting tracker. One ring, one number, and everything you need to know about where you are in your fast. THE TIMER Start when you finish your last meal. Sunfold counts from that moment — close the app, restart your phone, the timer never drifts. A full-screen ring shows how far along you are, and the metabolic phases are marked around it. SCHEDULES 16:8, 18:6, 20:4, 5:2, or set your own length from 4 to 48 hours. Change your schedule mid-fast and the goal moves with you — no need to start over. METABOLIC PHASES Watch your fast move from the fed state through early fasting, fat burning, ketosis and autophagy, with a plain-language explanation of each. Timings are presented as approximations, because that is what they are. HISTORY A streak calendar, total hours, average length, and every fast you have recorded. Add a note and how the fast felt. WEIGHT Optional. Log your weight, see the trend. No goal weight, no BMI, no judgement. WIDGETS AND DYNAMIC ISLAND Your timer on the Home Screen, the Lock Screen, and in the Dynamic Island as a Live Activity, ticking without draining your battery. REMINDERS When your fast is complete, thirty minutes before, and when your eating window closes. All scheduled locally — Sunfold has no push server. PRIVACY No account. No sign-in. No analytics, no advertising, no tracking. Everything you record stays on your device, and you can export it all as CSV or delete it in one tap. SUNFOLD PRO Free forever: the 16:8 schedule and the last seven days of history. Pro unlocks every schedule, unlimited history, charts, the metabolic phases and widgets. $2.99/month, $14.99/year, or $34.99 once. Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends, and can be managed in App Store settings at any time. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sanchizas007.github.io/Sunfold/privacy/ IMPORTANT Sunfold is a timer and a journal, not a medical device. It does not diagnose, treat or give medical advice. Talk to a doctor before fasting if you are pregnant or breastfeeding, under 18, living with diabetes or taking medication that affects blood sugar, taking medicine that must be taken with food, underweight, or living with a chronic condition. If you have or have had an eating disorder, please seek support before using a fasting app.