Some applications require more resources than is available with rollApp Starter and rollApp Premium is required to provide these apps with computing power and network capabilities necessary to run them in the cloud.
rollApp provides a service that allows to run hundreds of applications online on any device including devices and platforms, which are not supported by the applications themselves. Providing online virtual applications to thousands of users requires lots of computational resources. In a sense it is similar to buying a computer for everyone, who wants to run any application on rollApp.