The prototype application was implemented in Android on an LG Optimus 3D mobile phone using Real3D libraries. Data transfer between the phones was handled via Bluetooth. The default photo selection resembled a possible user’s photo gallery, and included different types of images of city scenes, nature, people, etc. When using the prototype, the perception of the depth of the private, shared and background layers was approximately 0cm, 0.5cm, and 1cm, respectively, measured from the screen surface level