Stop Facebook games and app invites
- Open facebook app
- Tap the three lines in lower left corner (More)
- Scroll to the bottom
- Tap Account settings
- Scroll to the bottom
- Tap Apps
- Tap Platform
- Select the option "No" to Game Requests
Note : If you select the option "No" to Platform, you will no longer be able to use Facebook Login on third party sites and services. Spotify is an example of this.