You will need to periodically login to the app.
Some features and content of a course are not available through the mobile apps.
Troubleshooting - If the app is not working:
Blackboard Mobile Learn - no longer available (Aug 2017) and does not work on iOS 11.
Blackboard Instructor app - NEW July 20, 2017
Bb Student allows you to view content - announcements, discussions, grades, some text content like blogs and journals, and some media content.
Mobile apps should not be used for: Taking tests or Quizzes
Some content cannot be viewed on mobile devices. For example:
Be sure to use a non-mobile device when taking tests or whenever the content is not accessible on your mobile device.