Tic Tac Toe is a game people play since kindergarten. It has a very simple mechanic that isn't confusing to learn. All you have to do is play against a person and do your best to connect three X or O in a vertical, horizontal, or diagonal pattern. 

This app lets you play this fun game on your smartphone. You can play it to distress or calm your thoughts. It also provides entertainment for when you are bored or waiting for something or someone.

It works on Android phones and tablets. It has a user-friendly interface and it can keep you preoccupied for long hours.