Our mission: Empowering smart energy management

The CaffeineCheck Philosophy

Caffeine is the most widely consumed stimulant in the world. Yet, most of us track our intake through guesswork. A late-afternoon espresso or an extra-large Starbucks drip coffee can linger in your system far longer than you think, directly impacting your slow-wave and REM sleep cycles.

CaffeineCheck was built to remove the guessing game. Our tools use clinical calculations to model your peak concentration, clearance decay timeline, and bedtime impact. Best of all, we do it with an ironclad promise of absolute privacy.

Privacy-First by Design

We do not collect your personal data. We do not track your location, require accounts, or sell your logs. In fact, everything you enter on CaffeineCheck is calculated and stored locally on your device in your browser's local storage. Your metrics remain entirely yours.

Our Scientific References

Our guidelines and metabolic clearance algorithms are modeled after recommendations from leading health authorities:

• Food and Drug Administration (FDA): Standard adult safe daily consumption recommendation (up to 400 mg).
• European Food Safety Authority (EFSA): Advice on safe single doses (200 mg) and adolescent thresholds (2.5 mg/kg body weight).
• American College of Obstetricians and Gynecologists (ACOG): Daily pregnancy limits recommendation (under 200 mg).
• Journal of Clinical Sleep Medicine: Recommended guidelines to stop drinking stimulants at least 8 to 10 hours before bed to prevent sleep disruption.