IMDb is the world's largest database for movies and TV. The International Movie Database give you all the information you will need about every movie, tv series or celebrity. View rating from real people and read reviews of classic movies and new blockbusters.
People from all over the world use IMDb to vote for their favorite movie or show. This way you get honest and independent score of any title released. Along with this there are inside stories trailers, gossip about the actors or directors and many more to read. Some other new apps like CineTrak try to compete with IMDb, but it stands as a solid competitor.
Every piece of information about any movie can be found in IMDb's database. If you are dedicated cinema fan that app is a must have. All of IMDb's features can be accessed on web too. There is very well organized and full of info FAQ section on their website.