Several other lesser-known video apps can offer additional 4K options. The streaming service Vudu, which is owned by Walmart, has many 4K movies for rent, as well as thousands of HD movies free to watch with advertisements, too. Fandango Now and UltraFlix are also preinstalled on many new TVs or available as an app. Fandango Now has an extensive library of 4K movies to buy or rent, while UltraFlix has many 4K movies, concerts and documentaries for rent.