问题
If I would be lucky enough to have my app preloaded into certain Android devices, can I serve both preloaded customers & new ones from the same app instance in any given Android store? The app would be free for existing users and paid for new customers.
Related question would be about different Stores. Can I update my preloaded app using any Store available or do I have to stick to Google Play?
回答1:
It's not directly possible because the Google Play store doesn't let you change an app from free to one that costs money. If it has a cost, you can raise or lower it as you wish, but once it's free, it's free.
You could try to work around it with some form of in-app purchase, but this would affect existing users that choose to upgrade as well so it's a poor option.
来源：https://stackoverflow.com/questions/18571802/can-an-android-app-in-store-google-play-or-other-be-free-for-existing-users-wh