Android - Setting usage flag
<p>I am currently creating an app and would like to create a demo version (free) and a full version.</p>

<p>However, I am wondering how I can set some sort of flag so that when the demo version has been used 5 times, you have to buy the full version to continue using. This usage will be detected on a submit button.</p>

<p>I was considering setting a flag in the app, however releasied that the user could uninstall the app and then re-install it overcoming my set flag (as this would set it back to 0).</p>

<p>Has anyone got any clever solutions for my little dilema?</p>

<p>Thanks</p>
