This app is for the person who made it to programatically market and to play with the API on their own pages. It is not for you to use.
This app is not for you. This app is for the creator to manage the app creator's own pages, not yours. If you somehow have managed to connect a page to this app, no privacy of your data is gauranteed, but no effort will be made to share it, either. They will actually likely attempt to delete it, and to unlink your page or account from this app. Though, currently, no data generated from this app ever actually leaves facebook.
You should not use this app. This app is only for the person who created it.