Water fasting and intermittent fasting, made clear — and no longer something you do alone.

Start a fast with one tap and follow your progress on your home screen widget. See what your body is doing hour by hour — fat burning, ketosis, cellular regeneration — based on published research.

FAST TOGETHER — ANONYMOUS BY DESIGN
• Live: see how many people are fasting with you right now
• Your Circle: add friends with a simple code, follow their fast live, send boosts and friendly nudges
• Groups & challenges: chase one goal together — from a 16:8 streak to a 7-day reset
• No profiles, no photos, no feed of strangers. You appear under a generated water name unless you choose otherwise.

YOU DECIDE WHO SEES YOU
Share everything, hide from one specific friend, or go invisible completely. One tap, any time.

NEVER LOSE YOUR PROGRESS
Link your Google account and restore your history, stats and circle on any device.

PICK YOUR PROTOCOL
• Intermittent fasting: 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD
• Water fasting: 24h, 36h, 48h, 72h, 4, 5 and 7 days
• Flex: set or move your finish time while the fast is running

ALSO INSIDE
• Home screen widget with your fasting status at a glance
• Health Connect: steps, active energy, heart rate and sleep in the app, and your weight and water logs written back
• Hydration and electrolyte guidance during longer fasts
• Streaks, trends and your full weight history
• Personal insights and reminders you stay in control of

Waterfaster is not medical advice. Talk to your doctor before longer fasts, and never fast on medication without medical guidance.

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