Transitioning from free to paid, database
<p>I have a simple database driven app. I'm looking to offer a free and paid version. The only limitation in the free version, is that you're limited to adding 10 records per month.</p>

<p>What is the best way to handle upgrading from free to paid, while maintaining the database?</p>

<p>I had planned on using in-app billing to unlock the ability to store unlimited records/month but I think that is probably beyond complicated for my simple app.</p>

<p>Other ideas were to sell an unlocker app... I don't know if people get confused by this concept though or not.</p>

<p>I could always write the free db to an sd card and have the paid app copy it. But a concern is people without sd cards and it just seems like something would go wrong and somebody would lose their data.</p>

<p>Any thoughts on this?</p>
