Reversi, also known as Othello, is a free strategy game developed by Rubick Games for Android users. The game is easy to play and has no extra pages or complications, offering a fun way to improve your IQ.

The game features sharp graphics and can be played offline, making it perfect for users who want to kill time while traveling. The game is compatible with both Android phones and tablets, and can be played by a single player or two players.

The objective of the game is to have the most disks on the board when the last disk is placed. Players take turns placing colored disks on the board to surround and flip over their opponent's disks. The first four moves involve players placing a black or white disk in the four central squares on the game board.

The game continues until the board is full or no valid moves remain. Players can capture and flip over numerous disks as long as they have a disk on either side in a horizontal, vertical, or diagonal direction. If a player has no valid moves, they lose their turn.

Overall, Reversi is a great game for users who enjoy strategy games. It is easy to learn but difficult to master, and with each move, players can feel like their IQ has gone up a notch.