The built in Session & Speaker Surveys are accessed via the Schedule in the app. Session and Speaker Surveys contain descriptive and/or objective questions. All survey responses are completely anonymous. There are separate reports for each of these (session & speaker) surveys and those can be found within the Reports section of the CMS.
Within the Schedule in the App users would click into a specific session and as long as at least 1 question has been assigned to the session they will see the survey icon (see screenshot below).