However, this can vary through age to age and from women to women. The built-in PeriodSense™ technologies will kick in after you entered two or more consecutive periods. It will constantly improve the prediction and get smarter each time you enter a new period. FILLED WITH FEATURES - Track and predict period, fertile and ovulating days - Designed with elegance - Passcode protection - Pregnancy mode - Track your symptoms and moods - Add notes for any particular day - Backup or restore your data over WIFI Download and start to use Period Planner today to make your life easier. Think of Period Planner as your monthly period cycle alarm clock. jenniec_lee - “This app is amazing. It helps me keep track of my period and everything related to it in a super easy way. Very complete; it’s a MUST have for girls and women!” linoeral - “I loved this app when I first installed it & the updates have only made it better. Thanks to the creators for listening for wants and needs to make it better!” Peter’s Mom - “I find it pretty accurate. I love the new calendar view. No more tracking on paper or counting and calculating in head. Very impressed with the updates. Creators seem very open to any sufestions to improve program and have done a great job.” *Each woman’s ovulation can vary under circumstances. Do not rely on Period Planner™ to avoid pregnancy.