app addon referral link

need a referral add on to an existing app. which provides certain amount of Reward Points to the referrer (one who actually shared the link to app) on successful install of the app by new user (one who received the link). I will try to explain our implementation using your scenario: So according to your user story: Every new user (E.g John) is given a unique referral link, which he/she can share it to his friends using FB/TW/Email or SMS. When John's friend clicks on the link, he is re-directed first to a Servlet which eventually redirects him to respective AppStore based on his platform (Android/iPhone) to download the app. Note that we can find out the IP address, user agent and device model of the user who clicked the link using a Servlet. We already know that the referral link belongs to John and hence the servlet maps the IP address,user agent and/or device model of John's friend to John's entry in database. The moment John's friend installs the app, and opens the app, the application sends the IP address, user agent and/or device model to the server. The server checks the entry against all the user to find the referrer and if it finds him, in our case John, John gets rewarded accordingly..