New game called Fire Rides, which is great.
Got it on iPad and liked it, so paid £2.99 to remove the ads.
It had automatically downloaded on my iPhone. Playing it on that, the ads are still there ad it seems to want another £2.99 again.
I bought you only had to pay once and could have apps on all your devices??
There should be an option to restore purchases, I've used that in the past although it's a few years since I've used iStuff so that might no longer be relevant.