In relation to the data processing of the users of Whatsapp and of Spotbros placed in Spain, the principles and guarantees of the LOPD are applicable. Without harm of the responsibility about the treatment of the data of the users of the apps that can correspond to the respective companies (Whatsapp and Spotbros), the lawyer has specific a degree of responsibility with respect to the treatment of the data of its customers, who the choice of the canals of communication more suitable with its customers includes. As much Whatsapp as Spotbros make clear in the information of the respective web pages that the respective apps cannot guarantee the security of the information sent using. Taking into account this, together with several detected vulnerabilities, and since in the context of the relation between lawyer and customers it can be usual the sensitive communication and data processing (article 7 LOPD), the utilization of the applications of Whatsapp and of Spotbros is not advisable, in relation to the security required by the LOPD and the RLOPD.