"Othello for all" is a free iPhone game developed by Unbalance Corporation. Players can enjoy the classic Othello experience through two main modes: playing against the computer or engaging in online battles. The introduction of "Online Battles" allows players to compete nationwide, with the option to participate in "Friend Battles" after linking with an AI Game account. A new grading system rewards players with experience points, unlocking special Othello boards and displaying their grades in rankings.

With 30 levels of difficulty, players can choose their preferred challenge level. The game offers various features such as single-player against the computer, two-player mode, handicap function, hint function, undo function, save and load game records, and the ability to replay game records.