On the other hand
Why are so many women saying their periods are suddenly late or irregular? Experts explain https://dailynews.co.za/lifestyle/health/2026-07-14-why-are-...
Your menstrual cycle may affect how well vaccines work https://www.newscientist.com/article/2532245-your-menstrual-...
COVID-19 vaccine 'disrupted the periods of thousands of women' - but changes 'short-lived' https://news.sky.com/story/covid-19-vaccine-disrupted-the-pe...
I always use open source apps, but at the same time I wonder how can my we all benefit from each other data respectfully of privacy, health or otherwise
And anyway the data that the other 50 apps are collecting on most people phones can be used to infer most of this. Your locations, what you bought recently, what you searched online, which sites have you been, what you asked your chat bot, what you liked or viewed in social media...