Can we use facebook "game service" for android non gaming applications?

Can we use facebook "game service" for android non gaming applications ? I want to reward my users for sending app install invite, FB page invite request and post share from my android non gaming application(Native android app). Can someone point me to achieve these ? Are there any FB policy violations to achieve these for non gaming applications ? Also I want to know the number of invites sent i.e., just invites count.