Crackle for iOS provides completely free streaming of television shows, movies, and other video content. Sure, it's ad-supported, and programs are occasionally interrupted by commercials, but considering the amount of content available, it's still worth it. The only problem is that none of it is in HD.
If you've used Netflix or HBO Go, then you'll probably notice that Crackle's user interface is similarly simple and intuitive. The Home screen starts you off with featured content, while the main navigation buttons on the bottom lead to pages with Movies, Shows, and your personal Watchlist. Content is laid out in an attractive tiled thumbnail view, or you can switch to a basic list view, if you like.
Because Crackle is completely free, it doesn't exactly offer all of the latest and greatest shows and movies for streaming. That said, it still has a wide selection of programs available, and not all of them are obscure. For instance, I spotted old TV favorites like "Seinfeld," "Sanford and Son," and "The Three Stooges," plus a few newer hits like "Homeland," "The Shield," and "The Walking Dead." Of course, you won't be able to find every episode for every series, but in many cases, you'll get a dozen or so to choose from. Just don't be surprised if newer series only offer an episode or two.