The mobile application is created for customers of the Friends and Allies club. The mobile application of the Friends and Allies club enables, among others: creating an account by the user logging in to the user account managing personal data in the profile, including selecting and deselecting consents, adding a profile photo, changing password checking the schedule of classes using the calendar and available filters booking places in classes, as well as resigning from such a booking adding classes to favorites course evaluation preview of the customer's passes, including access to information about the validity of the passes and/or the number of remaining entries displaying a QR code enabling entry to the club checking the address details of the club, as well as access to the club's e-mail address and social media links deletion of the account