It has been a while that I posted a comment, but you didn’t come back to tell more about your goal. Maybe you could solve it? Please, give some feedback as courtesy to those who want to help.

Do you really mean an ‘app’ which can run standalone on a mobile device?

Hope that is not the case. One suggestion: create a website and put links to all your published and uploaded courses. You can embed them in an iFrame as well.