Same APK for free and paid versions on Android Market?

Question

Is it possible to list in Google\'s Android Market a single APK for both free and paid versions?

So far, I only found this tip to create a butt

Answer 1

It's possible to use something known as in app products. The min API is 1.6, which should work plenty well. Basically, anyone could download the code, but some unlocking of features could be done if desired to buy new functionality. They also have sample code which shows how it works.

Alternatively, you could use the licensing API, and simply check to see if your app is licensed. This would require a different package name, however, as all apps do.