A computing device may include a memory and a processor coupled to the memory and configured to collect usage activity data across a plurality of different applications for a plurality of users, and determine different groups of users based upon cluster modeling of the usage activity data. The processor may further determine respective application priorities for the applications for each group of users based upon the usage activity data for the group of users, determine computing resource allocations for the applications of each group of users based upon the application priorities for the group of users, and run applications for the users with the computing resource allocations for the respective group of users applied thereto.