Casino Horse Racing is a betting game rather than a racing one — you choose a horse and a stake, and then the race runs without any input from you. The odds reflect each horse's chances, so favourites win more often and pay less.
Everything is played with in-game credits. There's no deposit, no payout and no real money anywhere in it.
No — it's played entirely with in-game credits, with no deposits and no payouts.
Yes — they reflect each horse's actual chance of winning, so a short-odds favourite wins more often but returns less on a win.
Yes — tap to pick and race. Nothing to install.