I also use the babycenter pregnancy app. It gives good tips and articles, but I still don't like it as much as this one.
Ovia pregnancy is awesome! It gives you little tidbits daily, as well as some other cool features :)
I know some awesome web sites....Baby Center, Cafe Mom and The Bump. They also have question forum's, advice forums and other friendly forum's!!!!
Oh yeah and the other pregnancy app I use is......Health and parenting (pregnancy).
Babycenter and I'm pregnant app