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Open the Timer tab, tap Start Fast, and choose a schedule. The ring fills toward your goal and shows the stage your body has reached.
A day is added to your streak whenever you complete a fast that reaches its goal that day. Miss a day and the streak simply starts again — no penalties.
As you fast, your body moves through stages — digestion, fat-burning, ketosis and autophagy. Ember shows the current stage and what's happening. The deeper stages and their science are part of Ember Pro.
All fasting stages, unlimited history, weight and insight charts, advanced schedules (20:4, OMAD, 36h), the remaining-time home-screen widget, and an ad-free experience. Pro starts with a 7-day free trial.
On your iPhone open Settings → [your name] → Subscriptions, choose Ember, and manage or cancel there. Cancelling keeps Pro active until the end of the current period.
Yes — as long as you're signed in to the same iCloud account, your fasts and history sync automatically and privately.