The humans in my family who experience menstrual cycles have been pretty happy with Clue who have an explicit promise to never give up your data. YMMV and of course you should evaluate what a promise from this organization means to you.
The humans in my family who experience menstrual cycles have been pretty happy with Clue who have an explicit promise to never give up your data. YMMV and of course you should evaluate what a promise from this organization means to you.