Period Calculator is a software utility for keeping track of women's menstrual cycle or period records. With Period Calculator, it has never been easier to manage your menstrual cycle records and tell your cycle status! Know your periods, and take control over yourself now. Major features: 1) Keeping track of menstrual cycle; 2) Predict next period and cycle status on a calendar; 3) Export and import period logs; 4) Customize parameters.