Out of 11+ sos classic apps on iOS, 11 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
A classic puzzle game similar to tic-tac-toe, but with more strategic depth. Players take turns placing letters to form 'SOS' sequences, earning points for each completed sequence. Compete for high scores on an online leaderboard.
Engage in a classic brain teaser, also known as noughts and crosses or xo. This app offers a fun way to challenge your logic skills with various grid sizes and play modes, including single-player, multiplayer, and online challenges.