Hi! I'm Circa. Let's find your fasting window — it takes about 60 seconds.
First question
Which track fits you?
Question 1 of 3
Which best describes you?
Question 2 of 3
Where are you in your cycle right now?
Question 3 of 3
How experienced are you with intermittent fasting?
Question 1 of 5
What's your age bracket?
Question 2 of 5
What's your primary goal?
Question 3 of 5
How active are you?
Question 4 of 5
When do you usually work out?
Question 5 of 5
Have you noticed changes in energy, libido, or recovery that concern you?
Your recommended fasting window
16:8
8-hour eating window
Your recommended window is calculated here.
Get your full 7-day personalized plan
Based on your result — what to eat, when to eat, what to drink during your fast, and what to expect in week 1.
- Your exact eating window with suggested meal times
- What to drink during the fast (and what breaks it)
- How to handle hunger in week 1
- When to adjust based on your energy
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