Caffy vs Caffeine Tracker

Caffy shows your exact caffeine level right now, and tells you precisely when you'll be ready to sleep tonight. Using pharmacokinetic half-life models backed by FDA, EFSA & NIH research, Caffy calculates your personal caffeine curve based on your biology. WHAT MAKES CAFFY DIFFERENT: • Real-time caffeine decay curve — personalized to your age, gender & sensitivity • Sleep readiness score (0–100) — know if tonight's sleep is at risk before bedtime • Focus window — see exactly when your caffeine peaks for maximum productivity • AI Weekly Analysis — AI reveals your personal caffeine patterns • Caffeine Detox Programs — structured plans to reduce dependence gradually • 6 Live Widgets — caffeine data on your Home Screen and Lock Screen • 5 Languages — English, Turkish, German, Spanish, Japanese PERSONALIZED HALF-LIFE: Your body processes caffeine differently. Caffy accounts for: • Pregnancy (9h / 12h / 18h half-life) • Oral contraceptive use (7h half-life) • Smoking status (3h half-life) • Age, gender & caffeine sensitivity SCIENCE-BACKED: Caffy's model uses the same caffeine decay formula cited by FDA, EFSA, NIH, and the Sleep Foundation — not estimates, not averages. A 45-minute absorption phase followed by exponential decay based on your personal half-life. PRIVACY FIRST: No ads. No data selling. Anonymous by default — no registration required on first launch. Your data syncs across devices via an encrypted, GDPR-compliant database. DISCLAIMER: All estimates are based on generalized scientific models and do not constitute medical advice. Consult a healthcare professional for personalized guidance. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Coffee is fine. Coffee at the wrong hour isn't. Sundown works out the last moment you can still have your usual drink and sleep — then shows you what happens if you have one anyway. AN ANSWER, NOT A NUMBER Every other tracker opens on a total. Sundown opens on a sentence: "Last drip coffee by 2:10 PM." The screen is a sky, and the sun sitting on the curve is the caffeine in you right now. The lower it hangs, the closer the day is to done. SEE IT BEFORE YOU DRINK IT Pick a drink, drag the time, and watch tonight change in front of you. A cold brew at 4pm and a cold brew at 6pm are not the same night, and now you can tell which is which. YOUR BODY, NOT AN AVERAGE People clear caffeine at wildly different speeds — the same cup can wear off in three hours or hang around for ten. Smoking roughly halves it. Hormonal contraceptives roughly double it. Set yours in three taps, or by hand. REAL PHARMACOKINETICS Caffeine peaks about an hour after you drink it, not the instant you log it. Sundown models absorption and elimination properly, including the slow-release kind in pre-workout. EVERYTHING THAT HAS CAFFEINE IN IT Drip, pour over, French press, AeroPress, Moka pot, K-Cup, instant, cold brew, nitro, espresso drinks. Black, green, white and oolong tea, matcha, yerba mate, chai. Energy drinks and soda. Plus the caffeine in dark chocolate, in painkillers, and in caffeine pills and gum. Make your own for anything missing. COME DOWN WITHOUT THE HEADACHE Cutting caffeine fast is what causes the headache. Taper plans step you down week by week and never take more than a quarter at a time. ON YOUR PHONE, NOT OURS No account. No sign-in. Your log never leaves the device. Apple Health sync works in both directions. Widgets on the Home and Lock Screen, a reminder 20 minutes before your cutoff, and one-tap logging from Siri and Shortcuts. — Sundown Pro Try everything free for 3 days. After that Pro continues as a monthly or yearly subscription, or a one-time lifetime purchase — your choice, shown in your own currency before you buy. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel in Settings on your Apple Account. Deleting the app does not cancel a subscription. Privacy Policy: https://247pro.github.io/sundown-legal/privacy.html Terms of Use: https://247pro.github.io/sundown-legal/terms.html Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Sundown gives you information, not medical advice. Caffeine content varies by preparation, so every figure is an estimate.