Thanks for changing the title but that's not what I'm asking. I'm asking whether if I uninstall a game that I only bought a few features in such as plague inc, would I have to buy that again? I didn't buy everything just a few extras in the game, will I still keep those if I uninstall?
Paid in-app purchases ? at least those done with the Play Store's built-in IAP systems ? should be tied to your Google Account just as with paid apps themselves, and should remain intact if you uninstall and reinstall the application.
This was the answer I was looking for, thanks a lot.