How to make sure the user has invited friends to the app?

Question

Android

There is a task to provide users with test access to all the functions of the application if they invite 5 of their friends or post a post about the application on their wall. How to make sure the user did it? Is it possible to track the sending of a message or the placement of a post on the wall of a social network through your application? Or is it easier for the user to give a referral link and give access only if the required number of times is registered using his link?

Answer 1

Referral link is the easiest option.
Of course, it depends on what you give the user, but, in general, you should think about it, but do you need it?
Isn't it easier to just give on the fact of sending the sharing intent (it can check RESULT_OK, but I'm not sure whether it will always be). Why extra gestures, did he make a post on the wall, did he delete it.