Tonk Classic, developed by Paris Pinkney, is a free knock rummy game available on the Android platform. The game is played with a standard 52-card deck without jokers, where picture cards are worth 10 points, aces are worth 1 point, and other cards are worth their face value.

The objective of the game is to form your cards into spreads, which can be either books of 3 or 4 equal-ranked cards or runs of 3 or more cards in a suit. The game ends when a player gets rid of all their cards without a final discard, runs out of cards by discarding their last card, drops or goes down at the start of their turn, or when the total value of the cards in a player's hand is 49 or 50 points immediately after the deal.

Tonk Classic is a fun and challenging game that requires strategy and quick thinking. It is easy to learn and suitable for players of all ages who enjoy card games. The game is accompanied by a user-friendly interface and offers smooth gameplay.