With the BabyBump pregnancy tracker, just enter your due date (or calculate from the last menstrual period) and the personal countdown screen shows the remaining weeks and days — with schematic embryo pictures of a baby for each week, as well as details about your baby’s size, weight and development.

The free app for iOS and Android from Alt12 Apps also helps you track your daily weight and waist measurements, as well as your mood, energy, appetite, cravings, morning sickness, and other notes.