The first version of this is live now. I have enabled it for all non-male athletes but anyone can turn it on in /settings:
As you can see your can also control who can see your cycle info (only yourself, your coaches, your followers).
You need to capture some historical period days. Once there is at least one complete cycle Intervals.icu will predict future cycles for the next 180 days. The period indicator is a red dot next to the date on the calendar.
Click in an empty spot on the calendar to add a calendar entry and choose “Wellness Data”.
