Hi! Woman here and that guy is correct. Tracking your cycle on paper is far safer than any app ever could be. These apps are not safe for your personal data.

I’ve been tracking in my paper planner for the last few years and I haven’t had to worry about any of these apps or companies getting my data. I track PMS symptoms, start and end times, amount of flow, and more. I can take my planner to the doctor to discuss any issues that may come up.

Calendars, bullet journals, and graph paper are the best ways to track periods.