Kal-OS will integrate with a number of services to provide additional functionality. Some services might be restricted to within Kaldus (such as Kal-Stamps), but these will be noted for the user to know. Kal-OS services will work within the application of the similar name. For example, Kal-Stamps will work with the K-Stamps application. This makes it easier to work with. All Kaldan services will be charged in Kaldan dollars, and therefore foreign transaction fees will apply for those outside of the country. Contact your card company and inquire about foreign transaction fees for actual cost.