Hey, There is NO house edge. You playing vs Real Player, Its means you have 50% chance to win (As him).
However, There is 2% Tax on every game.
2% fee is like house edge as I know because on the dice site with house edge we can choose 50% chance to win too but it lowered our payout so I think it will be just the same if you said there is no house edge but put higher fee on this tax on every games too. This is just matter of how we look into this game