The application is used to conduct proper respiratory relaxation. It is based on cognitive behavioral therapy (CBT) and was developed by the CBT psychotherapist prof. Brand Krzystanka. Thanks to the proprietary solution, the user can observe his or her breathing on the smartphone screen and, using a microphone-headset set, synchronize his breathing with the model breath. Relaxation lasts 6 minutes, at the end the user receives a message about the level of synchronization, which is a measure of correctly performed relaxation. The application also allows you to easily assess the severity of stress before and after respiratory relaxation, which allows the user to monitor their well-being.