A New Domain Name For Your Contests July 19, 2018
Today we updated the domain name used for sharing contests to make it even shorter. The domain contest.fbapp.io has been effectively replaced by contest.app.do throughout the app. This shorter URL will be easier to type in a browser's address bar.
The old domain will redirect to new one for a duration of one month. If you embedded a contest on your website and plan to keep it active for more than a month, we strongly recommend that you change the embedded code with the new one to avoid an interruption of service. You will find the updated embed code on the Publish section of your contest.
The URL for accessing the admin console - https://apps.facebook.com/my-contests/ - remains the same.