If with The Movie DB you were hoping to find an application for watching movies, series and anime for free then you better keep looking... though it did once offer such things that option is no longer available. You could go for MediaBox HD, an app recommended by the developers of TMDB or for others like Popcorn Time, for instance.
Hoping to become an alternative to IMDb
This application works as an online encyclopedia where you can find information on movies, series and anime regarldess of whether they are the latest releases or work that was screened a long time ago. Users can consult aspects like the synopsis, the cast of actors or view trailers and photograms. You can also create a list of movies and episodes that you have watched.
To be honest, it doesn't match up to an application like IMDb and its huge data base, with information on hundreds of thousands of movies and TV series. So instead of downloading second-best substitutes, you are better off sticking with the original...