In-app Billing design - How to give the user free items on first install
I want to implement in-app billing for my application where users can
purchase coins. However I want the users to get some free coins when they
first try the game. How do I go about implementing this?
If I just store it in the app settings, they can just keep re-installing
the game and getting the free coins again. And the SD card is not secure
enough, I don't want people tampering with it easily.
I hope this isn't a duplicate but I looked around and couldn't find
anything in the docs. Iv'e seen a few suggestions but they all include
using your own server, which I do not want to do.
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