Originally Posted by Kostas G
Regarding your specs, it seems that you also need a server-side application to support your design. Only a server can perform the user authentication. You can't to that client-side (on the phone) in a secure way. Also, in order to update the quizzes without updating the application means, that these must be stored in a server somewhere. Internet connection would need to be necessary.
I see the following server side sites available for quizzes
These sites do not allow us to define multiple choice quiz questions.
Are there any sites that allow definition of multiple choice quiz questions.