How to prevent an Android application from being installed more than three times?
<p>I have got a suggestion to restrict an Android application to be installed a limited number of times, let's suppose three times for a given user account. I have already inserted a form at the start of the application which checks for username and password from our database, and returns whether its valid or not. </p>

<p>Next I have to apply a trick to prevent this application from being installed more than three times by each user.  I hope it clears what I am trying to do.  Any ideas what to do and how to proceed?</p>
