I have been using this app for over 3 years. It has never failed me. It actually has made me take notice that I am starting to go through my change of life. Being a couple days late can show you a lot of your hormones! Listen to your body! Great app for teens too! Getting your moon cycle? Teach them young how to count their days! Shows them respect for their own bodies! They have control!
A freedom patriot about Menstrual Calendar FMC, v7.7