Really love this app! I have used it religiously for over 5 years when attempting to get pregnant, having failure in getting pregnant (showing my doctor what I have tried to obtain a fertility specialist referral ) plus tracking my cycles while going through miscarriage, fertility treatments and attempts at conception naturally. Not to mention this app transitioned me through a pregnancy, return of my cycle and trying again for baby number 2. I had no defects, problems or use with this app. Completely reliable!! I am still using it and rely upon it completely for tracking periods, ovulation and planning. Really easy to use and modify for your own use. This app tracks menstruation cycles, optimum ovulation, moods, weight, basal temp, "love dates" and any meta data you desire to track when things happened and when. I have used it to back-search data for when I took shots or took specific tests. I found it invaluable in when going back to the doctor for information they needed about outside specialists or dates on when things happened. Highly recommended!