Zuckerberg: All Facebook users should assume that their data has been compromised. Over time, we've allowed many apps to access our accounts on the social network. After the recent scandals involving the company, it does not spoil a bit of "spring cleanliness."
You can see which apps and services use your Facebook account for login or other stuff. You need to go to the Account Settings / Account Settings section in the Facebook mobile app. There you select Apps / Apps . In the next step you go Logged in with facebook / Login with Facebook
Here you can select all the apps you want to remove, which can now be done "in pile."