3-Day Fast - 72h Water Fast

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The only app built specifically for 72-hour water fasts.

Track 8 science-backed fasting phases in real-time — from fed state to deep autophagy. Know exactly what's happening in your body, which supplements are safe, and how to break your fast properly.

REAL-TIME PHASE TRACKING Watch your body transition through 8 distinct phases — from fed state to deep autophagy. Know exactly what's happening at every hour. Each phase shows you the science-backed changes occurring in your body right now.

SUPPLEMENT GUIDE Know what's safe to take during your fast (magnesium, electrolytes, creatine) and what breaks your fast (collagen, BCAAs). No more guessing.

MILESTONE CELEBRATIONS Hit 24h, 48h, and 72h markers with visual celebrations. See your journey timeline and know what benefits you're unlocking at each stage.

REFEEDING GUIDE How you break your fast matters as much as the fast itself. Get clear guidance on what to eat, what to avoid, and how to ease back into food safely.

LEARN AS YOU FAST Built-in guides cover everything: Why 72 hours? When does autophagy start? Day-by-day breakdown. Safety information. All backed by current research.

PRO FEATURES (one-time purchase, no subscription)

• All 8 fasting phases with detailed guidance
• Badges and achievements
• Cloud sync across devices
• Box breathing exercise for hunger cravings

Whether you're attempting your first 72-hour fast or you're an experienced faster, 3-Day Fast gives you the knowledge and tools to fast safely and effectively.

Safety Notice: Extended fasting can affect blood sugar, blood pressure, and electrolyte balance. Consult a healthcare provider before fasting, especially if you have medical conditions, take medications, or have a history of eating disorders. This app does not provide medical advice.