Water
Fasting AI
Your intelligent companion for safe, science-backed water fasting. Track your fasts, monitor your health, and reach your goals with AI-powered insights.
Water Fasting AI
Start
Mon 08:00
End
Thu 08:00
Feeling great
Phase 5 of 10
Everything You Need to
Fast Safely
A comprehensive toolkit designed to guide you through every phase of your water fast with science-backed insights.
Smart Fasting Timer
Real-time circular progress with Live Activity & Dynamic Island support. Track every second of your fast.
10-Phase Metabolic Model
Track your body's journey from glycogen depletion through deep ketosis to immune regeneration.
AI Safety System
Personalized safety checks based on your health profile. Hard blocks for at-risk conditions.
Complete Tracking
Water intake, weight, mood with 9 states, and electrolytes — all tracked in one place.
50+ Educational Articles
Science-backed content on fasting protocols, nutrition, electrolytes, and health.
Personalized Protocols
AI recommends your ideal fasting duration based on your experience, BMI, and health profile.
Start Fasting in
Three Simple Steps
Onboard
Answer questions about your health, experience, and goals. Our AI builds your personalized fasting profile with safety checks.
Fast
Start your fast with real-time tracking. Get phase-by-phase guidance, electrolyte reminders, and safety monitoring.
Track
Log water, weight, mood, and electrolytes. Watch your analytics evolve with weekly, monthly, and yearly charts.
Built on
Peer-Reviewed Research
Our fasting protocols and metabolic phase model are grounded in research from the world's leading fasting experts and institutions.
Buchinger Wilhelmi
World's Leading Fasting Clinic
Our fasting protocols are modeled on the clinical methodology of the world's most respected fasting clinic, with over 100 years of experience.
Dr. Jason Fung
Nephrologist & Fasting Pioneer
His groundbreaking research on intermittent fasting informs our safety thresholds and metabolic phase definitions.
Dr. Valter Longo
USC Longevity Institute
His research on fasting-induced stem cell regeneration and immune system rebuilding powers our Phase 8: Immune Regeneration model.
Start Your Fasting
Journey Today
Download Water Fasting AI and get your personalized fasting protocol backed by science.
Free to try · Premium for extended protocols