Essential English Vocabulary is an iPhone application designed to enhance English vocabulary skills. The app focuses on continuously updating lessons and expanding the word database to aid in the learning process. It provides word meanings, synonyms, spellings, and usage in sentences to assist users in memorizing English words effectively. Additionally, users can take tests on the words and earn points to progress to the next lesson and explore new word lists.

The app categorizes words to simplify learning and aims to teach vocabulary encountered in everyday life. With automatic addition of new words to the system, Essential English Vocabulary ensures a seamless learning experience for users.