I do have it installed in my iphone and I have to say that the App has it's bugs and it doesnt work well all the time, speacially on the login part. When you install it you have to introduce community.pennfoster.edu as the Jive community you are trying to access and when it asks you for your login and password you have to use your community credentials. Sometimes it will let you type in your credentials and redirect you to a blank page, what I do in those cases is to close the App (without login out) and reopen it and it wil load correctly maintaining the credentials I typed before.
As I said the App is not perfect but if you manage to get around it's minor bugs it does work.