I have an app that users have payed for.
Due to more work updating it i want to change to a billing subscription.
Can this be done with just updating the app? What happens then for users who already payed for the app?
Or do i have to upload a new app to Google Play?
So instead of a one time payment i want to change so that all users of the app has to pay a small amount to use the app for 1year at a time.