Some weekly pregnancy trackers based on due date are WebMd Pregnancy, BabyBump Pregnancy, My Pregnancy Today and I'm Pregnant, according to ABC News. These trackers are available as mobile applications on either an Android smartphone or iPhone.
WebMD Pregnancy is a free mobile application available for iPhones. It uses the due date to track the baby's development each week and show how the mother's body is changing, notes ABC News. BabyBump Pregnancy is available for both iPhone and Android users. This tracker displays how the baby is positioned each week and provides a list of possible symptoms that the mother may feel during that time.