TestObject is a cloud hosted service that provides mobile devices running Android and iOS for application testing. It supports a number of testing frameworks, such as Appium, Robotium, and Espresso, and can also be used for manual testing
TestObject - a part of SauceLabs
To enable TestObject, go to Settings - Cloud Providers and expand the TestObject item by enabling it. Enter the username, API key from TestObject and select your region from the drop-down.
Username and API key can be obtained from your TestObject profile page: