Abstract: A method and a system to test one or more applications respectfully installed in a plurality of devices at the same time are provided. The system may include a server, which is coupled to the devices and receives a test script configured to test an application of the devices. The devices may respectively include a plurality of agent modules on behalf of the server. The server may include a detector module to detect one or more operating systems used in the devices, an API, using one or more processors, to convert the test script into one or more test commands compatible to the operating systems, and a transmitter module to transmit the commands to the agent modules based on the detected one or more operating systems. The agent modules may be configured to respectively conduct tests on the application installed in the devices respectively using the commands.