A server and a method for managing apps based on app usage patterns are provided. The server may include a communication device, a storage, a processor, and a memory storing instructions. The processor executes the instructions to receive, from an image forming device through the communication device, usage data including usage information of apps executed in the image forming device, analyze usage patterns of the apps based on the usage data and store usage pattern data corresponding to the usage patterns in the storage, receive first data corresponding to a first event from the image forming device through the communication device, generate recommendation information related to an app performing an image forming operation corresponding to the first event based on the usage pattern data and the first data, and transmit the recommendation information to the image forming device through the communication device.