This app will be useful for all adults and kids who study English, regardless of initial level of knowledge.
If you know the language well, this app can become an exciting quiz, where you can check your level of knowledge on English words.
If you have just started learning English, this app can become a great help to broaden your vocabulary, while audio and visual facilities can stimulate effective learning of the new material.
Link: https://play.google.com/store/apps/details?id=air.englishforalllearnpro