--- title: "Caffeine Flow: Sleep Tracker - Reviews, Revenue and Downloads in Hong Kong SAR China | Apple App Store" description: "Caffeine Flow is an intelligent caffeine management app that tracks your body's caffeine levels in real time using half-life pharmacokinetics and guides you to the optimal bedtime for uninterrupted sl" --- # Caffeine Flow: Sleep Tracker — Hong Kong SAR China ![Caffeine Flow App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/02/9f/03/029f03ca-da25-cc25-7eb3-42b0e57f0167/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/434x0w.png) **Developer:** [Chinipy](https://apptail.io/developer/chinipy-xckuqb) **Category:** Health Fitness **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** com.chinipy.cflow **Store:** Apple App Store **Country:** Hong Kong SAR China **Version:** 1.0.2 (released 2026-05-12) **Original Release:** 2026-04-14 **Languages:** English, Korean **App Store Link:** [Download on Apple App Store](https://apps.apple.com/hk/app/app/id6759970536) **AppTail Page:** [https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/hong-kong](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/hong-kong) ## Caffeine Flow Description Caffeine Flow is an intelligent caffeine management app that tracks your body's caffeine levels in real time using half-life pharmacokinetics and guides you to the optimal bedtime for uninterrupted sleep. Log your daily caffeine intake from coffee, energy drinks, tea, and soda with ease, and visualize how caffeine flows through your body throughout the day. - Key Features - Science-Based Caffeine Tracking Using the caffeine half-life formula (C = C0 x 0.5^(t/h)), Caffeine Flow precisely calculates your current body caffeine level. Instead of simply tallying intake, it shows how your actual body concentration changes over time with intuitive visual graphs. Sleep Safe Time & Risk Warnings By combining your bedtime settings and caffeine sensitivity profile, the app pinpoints exactly when you should stop consuming caffeine and when it is safe to fall asleep. If you exceed your daily limit or sleep risk thresholds, intuitive warning chips appear directly on the home screen. Personalized Caffeine Profile A quick sensitivity quiz analyzes your metabolism type (Elephant, Human, or Rabbit). Factoring in your weight and special conditions such as pregnancy or adolescence, it automatically calculates your personalized daily caffeine limit. Expanded Asian & Global Drink Database Preloaded with data from major franchises and global brands across Asia (Korea, Japan, Vietnam, China, etc.). We now support official brand-specific cup sizes (e.g., Tall, Venti), making it easier and more accurate than ever to log your exact drink. Intuitive Dashboard View today's total intake, current body level, remaining daily allowance, and sleep safe time all on one screen. A 24-hour caffeine concentration curve lets you predict your caffeine trajectory ahead of time. Weekly/Monthly Deep Insights Go beyond simple charts. Our new Deep Insights feature analyzes your sleep interference index, recommended cutoff times, dependency trends, and unusual intake patterns. Get comprehensive weekly and monthly reports on how your caffeine habits affect your sleep. Home Screen Widgets Check your current caffeine level and estimated sleep readiness time directly from your home screen without opening the app. Smart Notifications Receive proactive alerts when your projected bedtime caffeine level may disrupt sleep. Get immediate notifications when you exceed your daily limit. Secure Data Management All records are stored securely on your device. Backup and restore functionality ensures safe data transfer when switching devices. 9 Premium Themes Choose from 9 aesthetic themes including Warm Beige, Midnight Slate, and Neon Cyber. Customize the app atmosphere to match your personal style. Korean and English Supported Full localization in both Korean and English. Start your science-backed energy management with Caffeine Flow. Brew, Track, Sleep well. ## Caffeine Flow Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ab/7a/ea/ab7aea9b-009c-864e-d0d8-3345e1792e51/store_1_hero_en.png/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/54/90/29/5490293b-2dce-e78f-9578-320c380bb779/store_2_search_en.png/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/18/c2/33/18c233e7-9e4c-5277-7e2c-b5a5323fb37f/store_3_sleep_en.png/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8c/c1/2b/8cc12b7c-591b-5c2c-6269-e970c1e6f2f9/store_4_stats_en.png/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a0/98/fa/a098fac9-377c-0935-e6e3-957993ab8c9b/store_5_profile_en.png/1242x2688.png) ## Apps Similar to Caffeine Flow - [Caffeine Tracking by RECaf](https://apptail.io/app/caffeine-tracking-by-recaf-psT/hong-kong) - [Caffeine App - Daily Tracker](https://apptail.io/app/caffeine-app-daily-tracker-vsT/hong-kong) - [리프레쉬골프](https://apptail.io/app/app-whVb/hong-kong) - [세컨드 윈드](https://apptail.io/app/app-WNkd/hong-kong) - [AwesomePlace: Street workout](https://apptail.io/app/awesomeplace-street-workout-pjqo/hong-kong) - [Caffeine Clock: Track Caffeine](https://apptail.io/app/caffeine-clock-track-caffeine-Yyoq/hong-kong) - [더트레일 - 등산, 걷기, 활동, 산책, 지도](https://apptail.io/app/app-raUw/hong-kong) - [카페잉](https://apptail.io/app/app-tBGz/hong-kong) - [cafein: café e sono](https://apptail.io/app/cafein-cafe-e-sono-vBeA/hong-kong) ## Caffeine Flow Available In - [Austria](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/austria) - [Brazil](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/brazil) - [Czechia](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/czechia) - [Germany](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/germany) - [Algeria](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/algeria) - [Estonia](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/estonia) - [Hong Kong SAR China](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/hong-kong) - [Italy](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/italy) - [South Korea](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/south-korea) - [Netherlands](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/netherlands) - [Norway](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/norway) - [United States](https://apptail.io/app/caffeine-flow-sleep-tracker-EBeA/united-states) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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