In this Facebook concept article, Facebook recommends Application request (i.e. apprequests
).
- The recipient is a friend of the sender and has not installed the game. This is considered an invite.
- The recipient is a friend of the sender and has installed the game.
- The recipient has installed the game. In this case the sender and recipient do not need to be friends.
On the other hand, send request is used to share information to other user.
Conclusion
Therefore, apprequests
should be used.