App for the 21th Yaroslavl Endoscopy Symposium - YES 2021. The application includes: • The program activities • The list of speakers and their individual schedules • The Add-to-favorites button • The interface in Russian and English • News, Sponsors, Congress information • Votes, questions, raitings for lectures The application will be useful to all conference participants. Contains icons by Flaticon: https://flaticon.com/