is it possible to upload a trial version of application on appstore for 30 days and after 30 days it should be paid version(with same features)

Hi,

I have developed an application and i am interested to publish the same app on app store as a trial version for 30days. And then later the same app should be converted to paid version(with same features).

The difficulty what i am facing is that apple does not allow the same application to be trial and paid.

Please let me know the possible solutions to convert my trial application to paid version after 30 days.