How to delete your app data from Facebook
If you login in an app or website with your Facebook account, Facbook will collect your data. Here I will show you how you can delete the data.
In your Facebook account, go to account.
Settings and Privacy.
Settings.
Apps and Websites.
Here you see the list of apps and website that are connected with your Facebook account.
You may click on See more.
Click the remove button behind the app you want removed.
To confirm, click remove again.