In 2019, 56 million girls aged 9-13 experienced menstruation for the first time. Sadly, most had negative experiences affecting their physical and emotional development. Worse still, girls committed suicide from bullying by peers, parents and teachers’ ignorance and the taboo around menstruation. To better prepare girls and normalise menstruation, our app helps users understand their overall body and health. It keeps track of oestrogen to estimate when first menstruations are probable, helping them to be both mentally and physically prepared.