youFAST makes intermittent fasting simple, motivating, and effective — with your personal fasting companion Ember by your side.
Download Free on the App StoreTrack 16:8, OMAD, 5:2, and custom protocols. Tap the ring to flip between elapsed and countdown. Ember cheers you on.
Search millions of foods via USDA database, scan barcodes, or enter manually. Track macros for every meal.
Steps, resting heart rate, and VO2 max pulled from Apple Health. See trends over weeks, months, and years.
Your daily readiness score based on fasting, sleep, hydration, and activity. Know when you're in Flow State.
Glanceable fasting ring, live timer, and phase on your wrist. Start and stop fasts without touching your phone.
Build your streak, earn achievements, and share your progress with friends via shareable cheer links.