To use it, you will need a Rossitur Calendar. You can request one from rossitur-travel.comAlso, you can find a sample image at http://server4creations.com/rossitur/markers/4.jpgPrint it out or view it on a screen to try the app.It works like this: Point your device's camera to the images printed on your rossitur-calendar and you will see them come to life. It's that simple! With offices in Luanda, Lisbon and Dubai, Rossitur takes you anywhere in the world. It consists of a team of experienced professionals in business and leisure travelers with personalized service excellence.Lay your calendar and be inspired to have an unforgettable experience!