Some features of our game do require an internet connection. You can play our games over WIFI or your cellular service.
If you are playing our game over your cellular service, some minimal data plan usage will occur. In the free version, data is being downloaded when the ads that are displayed are retrieved. In addition, if you play Winning Deals we get these hands from our servers, and if you are using Game Center or Google + we post scores. Both of these actions require an internet connection.
When our game is closed or paused in the background, it does not use your internet. It is important to be aware that Apple and Google are doing many things in the background that may use the data plan. Your phone is always reaching out to Apple and other products in the background, with tasks such as searching for messages, emails, GPS locations, etc...
Most devices have options to help you monitor or limit how applications use your cellular service. You may want to check the device settings to see how to get this information on your phone.