What’s New The completely redesigned Period of PURPLE Crying app has a brand new expanded library of child development topics related to infant crying, soothing, sleeping and coping with frustration. There is also an all new “Baby Tracker” that allows parents to track everything from baby’s feedings and diaper changes to growth and even crying. The Baby Tracker is a great way to record and watch your baby’s development. The newly redesigned Period of PURPLE Crying app contains a vast new librar