Is the app purchased from Google Play?

Question

Android

Good day. I had the following question: how can I check in the Android program whether it was purchased. That is, I want to provide different functionality for a program depending on whether it is purchased, but I do not want to make different versions for paid and free programs. Interested in whether this is possible, and what are the ways. Thanks for the answer.

Answer 1

developer.android.com/guide/google/play/licensing/index.html
But you have to make two apps on Google Play (paid and free).
Or you can purchase advanced features through in-app payments: developer.android.com/guide/google/play/billing/index.html

Answer 2

Thank you for your reply!