A computer-implemented method for automatically provisioning a device grid for use in cloud-based functional testing of an application includes providing a graphical user interface (GUI) that allows a user to input search criteria specifying a set of different device characteristics. A search is then performed across one or more device cloud providers to locate available physical devices that match at least one of the device characteristics. The available physical devices are displayed on the GUI. Responsive to selection input of the user, a number of each selected physical device for the device grid are reserved. An application program to test is then loaded on each reserved physical device.