  The use of mobile devices in combination with the rapid growth of the
internet has generated an information overload problem. Recommender systems is
a necessity to decide which of the data are relevant to the user. However in
mobile devices there are different factors who are crucial to information
retrieval, such as the location, the screen size and the processor speed. This
paper gives an overview of the technologies related to mobile recommender
systems and a more detailed description of the challenged faced.
