Caffy: Caffeine Sleep Tracker

Paid

★ 1 • Updated Jul 5, 2026, 03:09 PM

Caffy is a mobile application for iOS that helps users monitor and manage their caffeine intake to optimize sleep quality.

Use Cases ▼

Log daily coffee, tea, and energy drink intake

View real-time caffeine level curve

Check sleep score before consuming more caffeine

Follow guided detox program to reduce caffeine dependence

Receive weekly AI insights on caffeine habits

Sync data with Apple Health for comprehensive wellness tracking

What Problem It Solves ▼

Caffy helps users understand how much caffeine is active in their body in real time and how it may affect their sleep, enabling better decisions about consumption timing to improve sleep quality.

Key Features ▼

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Personalized caffeine metabolism modeling

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Sleep score to protect sleep

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Guided detox programs

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Apple Health integration and widgets

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Science-backed calculations

Overview

Caffy is a mobile application for iOS that helps users monitor and manage their caffeine intake to optimize sleep quality. It allows tracking of various caffeinated beverages—coffee, tea, energy drinks, and more—and employs a personalized pharmacokinetic model to estimate real-time caffeine levels in the bloodstream.

Full Description ▼

The app personalizes the caffeine half-life based on individual factors such as age, body type, and metabolic sensitivity (including adjustments for smoking and pregnancy). It features a dynamic curve displaying the absorption and elimination of caffeine throughout the day, with a 45-minute absorption phase and elimination half-life typically around 5–6 hours.

Caffy calculates a 'sleep score' by comparing the predicted caffeine level at the user’s set bedtime against thresholds known to affect deep sleep. Additional tools include guided caffeine detox programs, weekly AI-driven insights into consumption patterns, and integration with Apple Health and Home/Lock Screen widgets for at-a-glance monitoring.

The scientific basis of Caffy’s model draws on guidelines from the FDA, EFSA, NIH, and the Sleep Foundation, ensuring that recommendations align with established safe daily limits (400 mg for adults). The app is available as a paid download on the App Store.