Mozilla did a comparison between period tracking apps and there are some that should respect user's privacy https://www.mozillafoundation.org/en/privacynotincl

Mozilla did a comparison between period tracking apps and there are some that should respect user's privacy https://www.mozillafoundation.org/en/privacynotincluded/categories/period-ovulation-trackers/ https://www.mozillafoundation.org/en/privacynotincluded/cate...