Mobile In App Purchases - IAP
All mobile purchases are tied to your account when you buy the game. They remain on your account as long as you keep your account.
This allows you to remove games if your device gets too full and later reinstall them and restore the purchase without having to pay
for it again.
You can also install all of your games to any device you own.
But you have to make sure you log into the
on the new device that you used to purchase the game.