Mobile applications under the GPL/GNU license are open-source software programs designed for mobile devices. These applications allow users to freely use, modify, and distribute the software, promoting transparency and collaboration within the developer community. By adhering to the principles of the GNU General Public License, these apps ensure that the source code remains accessible, fostering innovation and improvement. Users benefit from a wide range of functionalities, from productivity tools to entertainment, while contributing to a shared pool of knowledge and development efforts. This approach not only enhances software quality but also supports a more inclusive and collaborative technological ecosystem.