OnTV is a third party client for the Tvtag (formerly GetGlue) service that has been rewritten from the ground up for Windows 8.1 2/14/14 Added a Facebook login option for users who it. Not all features are available in this mode as it uses an older API You can see what's showing on TV and check in your favorite tv shows. The more shows you like, the better the guide is able to recommend shows to you. Watch movie trailers and see trending show's movies.