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/
Ratings & Reviews
5.0
out of 5
1 Ratings
You can now choose whether your data is shared for the AI weekly analysis. Deleting your account is more thorough, plus bug fixes and layout improvements.
Version 1.0.8
The developer, Irfan Behic TIRPANCI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Purchases
Contact Info
Identifiers
Usage Data
Sensitive Info
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More