Paid for ads to be removed, do i pay again after deleting game?

if you pay to get ads removed, do you have to pay again to remove the ads when you reinstall the game after deleting it? also if i change devices do i pay again for the ads to be removed?
to be specific the game is "my boo" and i paid to get the ads removed but i need to change my device so i need to back up but was wandering do you have to pay again to remove the ads as i am scared to delete the game just incase. thank you

That is covered here:
iTunes Store: About In-App Purchases

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