Wondering when your period comes and goes or irregular periods? Use the Period Tracker: Ovulation Calendar & Fertile Days to stay on track and feel confident! Period Tracker: Ovulation Calendar & Fertile Days tracks your periods, fertility days, cycles, notes, ovulation and the chance of conception. **App offers identification of Days in the calendar (information): - Period Days - Predicted period Day - Normal Day - Ovulation Day - Fertility Day - Note (if you will add any notes it will show