Do iPhones have a GPS app out of the box or do I have to download an app?

? Well?

Cause I can't find it.

& If I have to download an app, which one is the best gps app?

Added (1). Wait I mean like, does it have a voice that just tells you "Turn left in half a mile" and all of that?

Cause just maps I'm no good with and that's a pain in the *** to try to figure out while driving

Added (2). Ok I found it and it does have the voice guide thing

It has an TomTom powered map app that comes preinstalled on the iPhone. So the answer would be yes.

It is under your maps. You can type in an A and B destination and it will give you directions to the place your looking for.

You need to download one. I prefer Google Maps. It's free and works well.