I've seen there's a lot of mobile apps that do that live using the phone's camera, but i didn't find anything that does it for already filmed footage.
Like, i have a POV shot of a bicycle riding on a road, and i want to add some AR elements (billboards, signs) on the sides of the road. Is there no software that just adds those in the scene? Kinda like Adobe Aero, but that one's for mobile as well....