Create Free/Paid versions of Application from same code

Question

So I\'m coming down to release-time for my application. We plan on releasing two versions, a free ad-based play-to-unlock version, and a paid fully unlocked version. I have

Answer 1

For everyone who want to use the solution by Denis:
In the new gradle version packageName is now applicationId and don't forget to put productFlavors { ... } in android { ... }

productFlavors {
    lite {
        applicationId = 'com.project.test.app'
        versionCode 1
        versionName '1.0.0'
    }
    pro {
        applicationId = 'com.project.testpro.app'
        versionCode 1
        versionName '1.0.0'
    }
}