The more words you know, the more intelligent you'll sound. An expansive vocabulary can help you out on job interviews, on dates, and during arguments. That's why you should aim to learn as much of the English language as you possible can. If you're interested in the idea, here are a few different apps that will help you increase your vocabulary:
1. Vocabulary Builder
On iTunes: itunes.apple.com
This app helps you learn new words in the easiest way possible. However, it might make you feel like you're taking a test. It will present you with a word and then ask you to choose the correct definition of it. If you get it wrong, then that word will pop up again later in the game to make sure that you've actually learned the definition.