You can play Backgammon with friends or family, offline via bluetooth. You all just need to install Bluetooth Backgammon, click Multiplayer, and choose a username. Next, someone creates a group and someone else join the group. If you chose to join a group, you would see the name of the Group-Owner on your screen. You can tap on that name and connect to the Group-Owner automatically through bluetooth. When someone is connected, Group-Owner can start the game.
You can also play Backgammon, single-player, with CPU. There are three difficulty levels to choose from: Easy, Medium, and Hard. The difficulty of Hard can be both addictive, and helping you improve. It is always a good idea to develop your skills on your own (with CPU), and use them while playing multiplayer with your friends and family!