Η Seene, is a free one application developed by the company Obvious Engineering. It uses "scene reconstruction technology" to enable your iPhone to take 3D photos.
Although there are several devices that have the ability to convert them smartphones in 3D cameras, the company claims this is a first software which allows your phone to create 3D images. By taking multiple shots, from many different angles, you can add depth to the image. The software then compares distances from the different opinions, and creates the photo.
The Results they are amazing and you can see them in the video below