Securing confidential information on mobile platforms has been, is, and will be a topical issue for specialists. In order to eliminate these vulnerabilities, specialized companies have made some patches, but these do not constitute a real guarantee that the same or any other applications will not be attacked and exploited without the users' will. Mitigating these attacks on smartphones can be achieved by securing mobile phones from both users and mobile providers. This article proposes the development of a chat application on the Android platform as a solution to ensure the security of digital data that is transferred through the available communication platforms. When designing this mobile application, the sudden increase in the number of users was taken into account so that the application is stable and creates a pleasant experience for them.