I enjoy expanding my vocabulary. It's useful for business dealings but it's also just plain fun to learn about words. I find this app to be useful because it teaches you words in context. I searched for sentences about "software" and learned several useful words that I didn't know. You can pin the words for later reference which is a nice touch.
Great use of material
Just what I have been looking for
Application "Whose leaf is it?" will help you in identifying trees