Take control of the family goings-on with these great smartphone apps, which offer a variety of easy-to-use—even fun—sharing and organizational features. In no time, you can have the family unit running like a Swiss watch.
Best for Divorced Parents: Kidganizer
Ideal for parents sharing custody of the children, Kidganizer ($2, Apple) lets Mom and Dad put custody-transfer dates and other important events, such as recitals and doctor's appointments, on a calendar they can view. It also allows each parent to tabulate monthly expenses ("I paid $50 for ballet classes; you spent $50 on karate").