# Caffy: Caffeine Sleep Tracker — Coffee, Energy Drink & Intake > Personalized caffeine tracker for sleep readiness and productivity. (iPhone/iPad app by Irfan Behic TIRPANCI.) - Source: https://appshunter.io/ios/app/caffy-caffeine-sleep-tracker/id6763036774 (this page in markdown: same URL + `.md`) - Developer: [Irfan Behic TIRPANCI](https://appshunter.io/developer/1895131748) - Category: Health & Fitness, Food & Drink - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 12+ - Requires: iOS 18.6 · 24 MB - Released: 2026-06-11 - Data updated: 2026-08-22 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/caffy-caffeine-sleep-tracker/id6763036774/reviews.md ## What is Caffy? 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/ ## Key features - Real-time caffeine decay curve - Personalized sleep readiness score - Focus window for productivity peaks - AI weekly analysis of caffeine patterns - Caffeine detox programs - Live home screen widgets ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Caffy Premium | $2.99 | per 7 days | | Caffy Premium | $6.99 | per month | | Caffy Premium | $29.99 | per year | ## Frequently asked questions about Caffy ### How does Caffy calculate my caffeine levels? Caffy uses pharmacokinetic half-life models backed by FDA, EFSA, and NIH research. It personalizes calculations based on your age, gender, sensitivity, and factors like pregnancy or smoking status. ### What is the sleep readiness score in Caffy? The sleep readiness score ranges from 0-100 and indicates how ready you are for sleep. This helps you know if your caffeine intake is putting your sleep at risk before bedtime. ### Does Caffy offer any programs to reduce caffeine dependence? Yes, Caffy includes structured Caffeine Detox Programs designed to help users gradually reduce their dependence on caffeine. ### Can I see my caffeine data on my phone's home screen? Yes, Caffy offers 6 live widgets that display your caffeine data directly on your Home Screen and Lock Screen for easy access. ### Is Caffy available in multiple languages? Caffy supports 5 languages: English, Turkish, German, Spanish, and Japanese, making it accessible to a global user base. ### What are the subscription options for Caffy Premium? Caffy Premium offers weekly ($2.99/P7D), monthly ($6.99/P1M), and yearly ($29.99/P1Y) plans, all with a 3-day free trial. ### Does Caffy have ads? No, Caffy is ad-free. The app prioritizes user privacy and does not display advertisements. ### Is Caffy suitable for all ages? Caffy has an age rating of 12+, indicating it is intended for users aged 12 and older. All estimates are based on generalized scientific models and do not constitute medical advice. ## Version history (last 5 releases) ### 1.0.4 — 2026-08-18 Bug fixes and small improvements. ### 1.0.3 — 2026-08-11 Caffeine now behaves the way your body does. ABSORPTION Until now Caffy started the decline the moment you logged a drink. That is not how caffeine works — it takes about 45 minutes to reach your bloodstream. Caffy now models the rise and the fall, so the first hour after a coffee is finally accurate. The home gauge tells you when caffeine is still being absorbed and how long is left, and "next coffee" and your sleep window follow the same curve instead of pointing at a moment when your caffeine is still climbing. Widgets use the same model. A MORE PERSONAL METABOLISM Smoking and oral contraceptives now scale your half-life rather than overriding it, so they combine properly with your age, sex and sensitivity. Weight is gone from the profile — the research does not support it, and pretending otherwise made the numbers look more personal than they were. DRINKS Instant Coffee joins the list with its own icon, and every built-in drink has had its caffeine content re-checked against published figures and corrected where it was wrong. PREMIUM COSTS LESS Monthly is down by about 40% and yearly by two thirds. There is also a new Lifetime plan: pay once, keep everything forever. The Premium screen has been redesigned around a clear trial timeline, and now answers "how do I cancel?" without making you hunt for it. ALSO A new app icon. The first-drink hint no longer breaks after you delete a drink, drink sheets share one header, and the add-drink animation shows the right icon. ### 1.0.2 — 2026-07-28 This update makes Caffy clearer and more personal: • A redesigned Insights preview with real highlights from your own last 30 days • Bigger, easier-to-read text across the app • Your 30-Day Trend now explains what it means, with month names in your language • Free preview of the "What if I drink?" metabolism simulator • Share your Caffeine DNA as a polished image card • An optional reminder if you go a few days without logging • Lots of polish and fixes, including tidier notifications ### 1.0.1 — 2026-07-02 • Beautiful new animated dashboard gauge, watch your caffeine rise and fade in real time • Share your Caffeine DNA, now works smoothly on iPhone • Metabolism simulator now offers a wider range of quick-pick drinks • Widgets now match the app's drink icons and bedtime caffeine calculation • Accessibility and performance improvements, plus various bug fixes Thanks for using Caffy! Got feedback? We'd love to hear from you. ### 1.0 — 2026-06-11 No release notes. ## Related topics [caffeine sleep](https://appshunter.io/ios/topics/caffeine-sleep) · [caffeine sleep planner](https://appshunter.io/ios/topics/caffeine-sleep-planner) · [caffeine ai](https://appshunter.io/ios/topics/caffeine-ai) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*