Android Google Analytics Tracking Referrals From my Free App
I have both a Free and Retail Version of the same Android App....I'm already using Google Analytics to track App usage for both, But what i'm looking into is tracking users of the Free App that purchase the Retain Version.......So I can see me Turnover Rate.

Can this be done if so whats the best way of doing so....? 
Android Google Analytics Tracking Referrals From my Free App
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I have both a Free and Retail Version of the same Android App....I'm already using Google Analytics to track App usage for both, But what i'm looking into is tracking users of the Free App that purchase the Retain Version.......So I can see me Turnover Rate.

Can this be done if so whats the best way of doing so....? 