This paper presents ADDOCO: an adapted data distribution model for collaborative mobile applications. The object of ADDOCO is to provide a dynamic data distribution in collaborative environments, based on mobile technologies. In order to support effective distributed collaboration, ADDOCO is based on a data-centric model that allows change dynamically the way the data is distributed and the roles assignment to the participants within a collaborative environment. The dynamic distribution of information and the roles assignment model ADDOCO were tested in a collaborative application using smart phones.