Officially, Twitch does not have an app on Roku TV as it has been removed from the Roku Channel Store. However, there are several workarounds available to watch Twitch on a Roku-enabled device. One of the easiest methods is to cast your screen from a device that supports Twitch onto your Roku TV. You can also use a Chromecast device, an HDMI cable, or the screen mirroring feature on your TV to cast Twitch from your PC to your TV. If you are using an Apple device and your TV supports AirPlay, you can AirPlay Twitch to your TV. While Roku does not have its own internet browsing app, you can use screen mirroring to surf the internet on your Roku TV by downloading internet apps like Opera, Poprism, Web Browser X, or Chromecast from the app store.