Skru is a strategic card game available on iPhone that challenges players to minimize the value of their cards to win. At the beginning of each round, 4 cards are distributed face down to each player, with players allowed to view their rightmost 2 cards. Throughout the game, all cards remain face down, adding an element of mystery and strategy. Players have three options on their turn: replace the center card, replicate a card, or draw a card. Special action cards like 7, 8, 9, 10, Eye Master, Swap, and Replica cards introduce unique gameplay dynamics, allowing players to manipulate card visibility and interactions.

The game continues until a player declares 'Skru,' skipping their turn and signaling the end of the round after all other players take another turn. The player with the lowest score at the end of the round earns 0 points. However, if multiple players tie for the lowest score, they all receive 0 points. It's crucial to avoid declaring 'Skru' prematurely, as doing so without having the lowest score results in a penalty of double the round score.