Déjà Vu Photos is an iPhone app that offers a unique time travel experience through a collection of vintage photographs curated for various cities. By utilizing augmented reality, this app allows users to peer into the past by comparing historical photographs with the current view. Using the iPhone's sensors, including GPS for location accuracy, gyroscope for angle alignment, and compass for direction guidance, users can immerse themselves in a before-and-after comparison of iconic city locations.

Explore cities like New York City, Boston, Washington, London, Paris, and more with Déjà Vu. The app provides features like specialized compasses for precise location guidance, gyroscope assistance for photo alignment, side-by-side camera view for recreating shots, and a point of view exploration mode for a deeper dive into city landscapes.