Learn Japanese Offline is a very useful and user-friendly application. You can learn Japanese without having to go through the hassle of an internet connection, all you need is to download this app. It is a completely offline app so you don't have to worry about data charges when using it.

The app features over 1500 common words and phrases in the Japenese language. All the words are categorized into different topics. You can also add the words to your favorite list so you can easily look them up when you need them.