Suppose I have two sets of apps, approved and currently for sale, in the iTunes Store and in the Google Play Store: on is called Foo Free and the other Foo Paid.

Foo Free is a free application, for iOS and Android. Foo Paid is the same application, only it has a couple of more functionalities than the free version, and costs, say, 5$.

In a bout of generosity, I decide to phase out Foo Paid from both the stores, and offer the same functionalities of Foo Paid in Foo Free, that from now on, becomes the only Foo application available.

So, the questions:

* How can I remove Foo paid from each store? I know that I should deselect all available countries in my iTunes Connect, and the applications gets out of sale. What is the equivalent action to take on the Google Play store?
* Once I remove the paid apps from each store, what is going to happen to the users of the paid apps? Will the app(s) disappear from their device(s)? Or they simply keep the app and never get any update again? Is there any difference between Apple App Store and Google Play store in this respect?
* Is there a way to make this transition "graceful", for each store? i.e.: can I make users that bought Foo Paid transition automatically to Foo Free, without having to download Foo Free manually?