Most cycle trackers decide you need one the moment you say you are a woman. This one asks instead, and what it shows depends on your answer.
Free, no account neededRegular cycle, irregular or perimenopausal, menopause, or not tracking at all. Choose the last one and the section disappears completely.
A regular cycle gets a predicted date. An irregular one gets a range, because naming a single day there would be a guess dressed up as a fact — and being told the wrong date is worse than being told a range.
When there is no cycle to predict, the section covers what actually changes: calcium, vitamin D, protein across the day, and why loading the skeleton matters more than walking.