A cycle tracker that actually asks about your health, not just your dates.
Most trackers give you a guess based only on a 28-day calendar. Ada Cycle asks about your conditions and medications too, so your estimate is built for your actual body.
When did your last period start?
This is the only thing we need to give you a first estimate.
Any conditions we should know about?
This helps us widen or narrow your range honestly — it doesn't change how we see you.
None of these
PCOS
Irregular cycles
Something else
Are you using any contraception?
Hormonal methods change your cycle — we account for that.
Not using any
Hormonal (pill, injection, IUD)
Non-hormonal
Something else
Skip for now
Your estimate
Based on what you've told us so far.
Estimated fertile window
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Next period expected
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Why this range
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Ada Cycle gives an informational estimate only, based on what you tell us. It is not a medical device and should not be used as your only method of contraception or family planning. Always speak with a healthcare provider about your specific situation.
What did you think?
Quick reaction — takes 20 seconds, goes straight to the team.