Diary is an add-on extension to your Google space and its services: Drive, Sheets, Tasks and Calendar. None of the Diary components require their separate placement directly on your device. All elements of the Diary are located within the user's personal and secure Google-environment. The diary is designed for simple and convenient navigation in the library of open materials of the Crimson Circle, as well as keeping a personal history of their passage. Together with the advantages of Google cloud services, Diary will allow the user in his own Google space, without third-party applications and on devices of any platform: - keep your own history of passing the Materials of the Crimson Circle; - have easy access to the Crimson Circle Materials. The diary is not intended for commercial or marketing purposes and has been created with increased attention to the security of personal data. Minimum requirements: a Google account.