The free Jachranka23 mobile application is a handy guide for the participant of the conference: "Jachranka 2023. About lung diseases practically" organized by the "Healthy Lungs" Association and the Department and Clinic of Internal Diseases Pneumonology and Allergology of the Medical University of Warsaw. It contains a number of necessary organizational information regarding the location, accommodation and access. It allows e.g. for the ongoing updating of the program and setting your individual agenda.