How do I upgrade the app to the Pro version?

Question

Mobile development

Is it possible to upgrade an application from the standard version to the Pro version so that the standard version is replaced by the Pro version, and not installed additionally, creating a separate application with a separate icon in the device?
After the upgrade, the Pro version should save all user data of the standard version (in this case: order history, profile data). The application icon should also remain unchanged. Only the name of the application will change (the word "Plus" will be added to the name). In fact, this is a regular application update, but paid.

Answer 1

The name is hard to change, because it is written in the configs. And in-app purchases will help you.

Answer 2

It is not possible to publish an update for a fee.
You can change the name: In the manifest, you need to change android: label
As a rule, label refers to a string in a string resource, which means changing this string.
Then, if the name of the application has not changed in the Google play console in the DATA FOR GOOGLE PLAY section, change it there as well.
The only BUT: if you published the application as free, it is no longer possible to make it paid (but you can add in-app purchases).