Four In A Line Online app for iPhone and iPad

Play "Four In A Line" online with players all over the world or play offline with machine AI.
"Four in a Line" is a two-player game in which the players first choose a color and then take turns dropping their colored discs from the top into vertically-suspended grid. The pieces fall straight down, occupying the next available space within the column. The object of the game is to connect four of ones own discs of the same color next to each other vertically, horizontally, or diagonally before ones opponent can do so. There are two variations on the board size, the most commonly used being 7x6, the other being 9x7.
It has a strong AI engine when play offline, there are 7 difficulty levels in total. In online play mode ELO rating system is used to calculate the relative skill levels of players.