All you need to enable Roku App on your TV is the Roku app, which works with a number of Smart TVs, including Amazon Fire TV, Apple TV, Vizio TV, Hisense TV, Xbox, Roku TV, Google Chromecast, Android phones, tablets, iPhones, iPads, and PC/Mac web browsers. To activate the RokuTV app, you need to find an activation code on your TV screen. To locate the link code at Roku.com/link An activation code will appear on your computer or smartphone when you open the RokuTV app on your favorite streaming device and select Sign in. After the code appears on your TV screen, you can use your phone or computer to go to Roku.com/link and enter the code from your TV to activate it. This will enable that specific TV or streaming device to access your RokuTV account without you having to enter your password on the TV. Â