Players must choose whether to knock to end the round or keep drawing cards to improve their hands, which gives the game its fast-paced and strategic depth. Indian Rummy is another popular variation that uses two deckbonus rummy apps of cards and requires players to form at least two sequences, one of which must be a pure sequence devoid of jokers. Other noteworthy variations include Canasta, which requires players to form melds of seven cards and adds elements of teamwork, and Kalooki, which adds extra complexity like wild cards and particular scoring systems. With its distinct flavor, each variety of rummy appeals to a range of tastes and ability levels.