One Ha’etz for the Whole Day

If one is to rely on the halacha that if I say pri haetz on an apple and throughout the whole day I can rely on this bracha to eat any pri haetz, do I have to have specific intent when I make the bracha for that to be valid?

A – No
Q – Also, if I follow that halacha, and I ate grapes after I made an original bracha on an apple, do I make al haetz bracha achrona?
A – Yes