In order to make it easy for you to manage your app easily anywhere and anytime, we don't ask you to sit in an office with a computer, you can do all you need from your mobile phone!
After you installed the App, click on its icon:
You will see the following screen asking to Login with Facebook:
Make sure you are logged in with a Facebook account that is listed as a manager in your Facebook page roles list.
On your first login, you'll be asked for permissions to give us Facebook data (public profile, timeline posts, and email address.
Then you will be asked for Advanced Permission to show a list of the pages you manage:
You will see a list of all Facebook business pages and you need to click on the App that created:
Finally, you will reach your management App dashboard: