Waterfaster: Fasting Tracker

See how many people are fasting with you right now. Add friends with a code, send boosts, chase challenges together — all anonymous. Backs up to Apple or Google.

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

Start a fast with one tap and watch the live countdown on your Lock Screen, in the Dynamic Island and on your Home Screen widget. Follow 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 Apple or Google and restore your history, stats and circle on any device.

PICK YOUR PROTOCOL • Intermittent: 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 • Live Activity, Lock Screen and Home Screen widgets • Apple Health: steps, sleep, heart rate, weight and water • 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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