Vudu is an online movie streaming service. Similar to iTunes, you have the option to rent movies and television shows. If you really like a movie, you can buy it outright. All movies are available in standard definition or high definition. Vudu has apps that run on many devices including Roku and Chromecast. As of January 2015, Vudu had over 18,000 movies and 5,000 television shows in their catalog. Titles range from major motion pictures to cartoons and television series.