From Mobilinc page:
MobiLinc X requires your ISY-994i have our MobiLinc Portal module installed. To install, open the Admin Console and go to Help->Purchase Modules to install the MobiLinc Portal and then Help->Manage Modules. Do not install the UDI/ISY Portal as MobiLinc X will not work with the UDI/ISY Portal. If you've installed the UDI/ISY Portal, please contact UDI Support to have them remove the UDI/ISY Portal and install the MobiLinc Portal for your ISY.
Looks like they want to compete with ISY portal. Mobilinc is too expensive and slow with feature updates. What are the alternatives? I'm afraid UD is too dependent on Mobilinc and this will harm UD in the long run...