best spanish vocabulary app for iPhone and iPad

Vocabulary words are the building blocks of communication. As you progress, you will want to expand your vocabulary in areas that are of interest to you.
commonly-used Spanish phrases and vocabularies for travelers and beginners.
This app contains distinct sections, each containing different types of words.
The main purpose of the app is to enhance and enrich your Spanish vocabulary by reading, understanding and learning as many words as possible and also their usage in written and oral communication.
This app is different from other vocabulary apps, as it deals exhaustively with the words, their usage and also there is a grammar portion included in it which will certainly help the readers.