The MyQuit App uses the same Internet data as browsing the web and using email on your phone. If using your cellular data while roaming usually costs you extra, you will probably also be charged extra by your mobile provider for using The MyQuit App. However, we recommend you contact your mobile service provider regarding the different international Internet roaming plans available. If you currently do not have an international plan, we advise that you turn off your roaming option while abroad to avoid extra charges: go into the >Settings of your phone, then into >Mobile Data.