oxygen com link roku sign in Ensure that you have the Oxygen app installed on your Roku device. If you haven't installed it yet, you can do so from the Roku Channel Store.From the Roku home screen, navigate to the Oxygen app using your the app and press the OK button to open it In the Oxygen app, you should see an option to sign in or log in. Select this option.Using the on-screen keyboard, enter your Oxygen username (usually your email address) and password.Use the Roku remote to navigate through the keyboard and input your information.After entering your credentials, select the "Sign In" or "Log In" button using your Roku remote.