They both offer lots of advises from pregnancy day 1 to labor to post par tum. They will give you weekly updates specifically on your baby's development each period. They also provide checklists of what to buy, what to do and how to give first aids/relief to common pregnancy discomforts. The Baby Center app has birthing and labor classes. I am planning to start learning more about these two next month so I can be less nervous on "the great pushing day!"
P.S. I take my prenatal vitamin every day at lunch time.