#1

Im looking to the users/friends/ids and lookup but there does not seem to be a way to see if a perticular user has authorized/installed my app?

Can this be done at all. Should be a common enough use case…

#2

do you have find answer?

#3

This cannot be done. If you want to keep track of users who’ve installed your application, you’ll need to keep track on your own accord.

#4