LineDoku is a free Android puzzle game developed by Cache Cleaner. The game's objective is to solve puzzles by swapping numbers to arrange them in a line. The game consists of 1500+ puzzles with three modes, 3x3, 4x4, and 5x5.

In the game, nine numbers are arranged randomly on a 3x3 grid, and the player needs to swap certain numbers to arrange them in a line. LineDoku is a fun and challenging game that requires logical thinking and problem-solving skills. The game's simple and intuitive interface makes it easy to play, and the different modes and levels make it suitable for players of all ages.

Overall, LineDoku is an excellent puzzle game for Android users who enjoy brain teasers and challenges. The game's numerous levels and modes ensure that the player never gets bored, and the game's free license makes it accessible to everyone.