Fasting and eating window

Start an optional fast with a target, track it, and set an eating window, or turn fasting off completely.

AndroidiPhone & iPadUpdated October 6, 2026
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Fasting is entirely optional. ZapFit never forces a fasting recommendation.

Start a fast

  1. On Today, find Fasting & eating window and tap Start a fast.
  2. Set the Target hours.
  3. Start it.

ZapFit shows how long you've fasted against your target. Tap Stop & complete when you finish, or Cancel to discard it. You can stop at any time.

Eating window

In Profile > Meals & water, turn on Enable eating window and set when it starts and ends.

Turn fasting off

Tap Disable fasting feature to hide it completely whenever it isn't useful or safe for you.