Emberfast
FASTING
0:00:00
of a 18h fast
You can eat in
—
CURRENT STAGE · 12–16H

Ketosis Begins

    Eating windows

    Fasting runs continuously between windows — across midnight, across weeks. No resets, ever.

    Cloud sync

    Your data saves to the cloud automatically whenever anything changes — open the app on any device and it will always be up to date.

    Connecting...

    Profile code — enter this on another device to access your data:

    Prolonged fast mode

    Enable for multi-day fasts (24h, 48h, 72h+). The clock runs until you stop it manually — eating-window boundaries are ignored while this is on.

    Fasting experience

    Ember calibrates her coaching tone and depth to where you are in your journey.

    Safety mode

    Adds health caveats and safety guidance to Ember's replies. Off by default — Ember speaks directly without routine disclaimers.

    Appearance

    Choose Light, Dark, or System — System follows your device's day/night appearance and switches automatically.

    Your journey

    LEVEL 1
    Spark
    0 XP

    Ember's read on your progress

    Ask Ember to summarize the benefits you're compounding — daily, weekly, monthly, yearly. Cached until your numbers change, so it won't re-bill.

    Your fasting week

    —
    12a6a12p6p12a

    Badges

    Recent fasts

    Break it right

    How you end a fast decides how much of the benefit you keep.

    The full stage map

    Ask Ember

    Hi — I'm Ember, your fasting coach. Ask me anything: what breaks a fast, electrolytes, how to push to 18 hours, what's happening in your body right now…

    When did this fast actually start?

    Set it to your last bite — even if that was before you opened the app. Every fasting minute counts.

    When did you start eating?

    Defaults to now — change it if you actually had your first bite a little earlier.

    When did you start fasting?

    Defaults to now — change it if your last bite was actually a little earlier.

    Were you still eating?

    This fast started only a moment ago — often that means you hadn't really stopped eating yet. If you kept eating, set your true last bite: we'll drop this short fast and restart the clock from then.

    Edit this fast

    Adjust start and end times — duration recalculates automatically.

    Started

    Ended