This isn’t what I would call the first ever Augmented Reality application (there’s a number available) although it may be the first app calling itself the first social AR app!
With junaio, end users can visually interact with the world by placing 3D objects into the real world, leaving notes and information about places, and creating cool experiences to share with friends on social media sites like Facebook. Junaio ties existing social networks together with picture-based social interactions and lets users see location-based content through their iPhone display