According to some historians, it developed from a Mexican game known as "Concentration.". Others think that the Chinese game "Mahjong" is its ancestorindian best gaming app. Though its exact origins are unknown, rummy has changed significantly over time, giving rise to a number of variations, such as Indian Rummy & Gin Rummy. Every variation has its own set of guidelines and tactics that are influenced by the local cultures in the areas where they gained popularity.