This app, Caro-Gomoku-Renju-Fiveinarow, features a powerful AI and supports four common rule sets:

• GOMOKU Freestyle: The first player to achieve an unbroken line of five or more stones horizontally, vertically, or diagonally wins.
• CARO (Blocked Rule - Gomoku+): Victory requires an unbroken line of five stones, which cannot be blocked on both ends. Lines like XOOOOOX and OXXXXXO are invalid.
• GOMOKU Standard: The first player to create an unbroken line of five stones horizontally, vertically, or diagonally wins. Overlines (six or more stones) do not constitute a win.
• RENJU: To mitigate Black's inherent first-player advantage, additional rules are implemented: Black (X) is prohibited from creating double threes (two separate three-stone lines), double fours (two separate four-stone lines), or overlines (six or more consecutive stones).

The app boasts a highly intelligent AI with adjustable difficulty levels, ranging from easy to extremely challenging. You can also play against a friend. Additional features include zoom functionality, support for two-player mode and AI play, display of the last move and threat lines, and unlimited undo capabilities.

Version 4.0.4 (May 18, 2024): Bug fixes.