This post seems to focus on requests for games that are played on the Facebook website, but what about mobile apps? I am actually in the process of integrating requests into my Android app and other than a bug I ran into, I was actually pleasantly surprised by the way the request works. Since my app is only on Android, the notifications only appear on Android devices. If you invite people who are not using an Android device, they will never see the notification. If the user doesn't have the app installed, the notification will bring them to Google Play, otherwise, it will launch them into the app. This feels a lot less spammy overall and it at least feels as though it will be moderately effective. Anyone have any data on this?