The Twitch app has now arrived for Vita for users in the UK and Europe, allowing people to watch streams on Sony’s handheld without having to navigate the actual Twitch website in the browser. Of course you won’t be able to broadcast from the Vita since it is missing the necessary hardware which would allow players to do so. The app itself weighs in at 16.7 MB, and you can grab it from here.
The Twitch app is also compatible with the PlayStation TV.
Source: PS Store