A free program for Android, by Zynga.

When you’re bored or just want to kill time, Okey Plus is a great app to try with your friends. It is simple yet exciting, and you can lose yourself in it for hours. Joining existing rooms allows you to invite friends and play with them at any time. You can also play Okey by entering a random game room. Another fantastic feature of this app is the ability to play Okey Plus while listening to your favorite music.

Although downloading and using this app on a daily basis will earn you thousands of free chips, you can also play as a guest if you prefer, which means you do not need to create an account.