I’ve taken Spanish for over four years. Now that I am in a more advanced class, I find myself forgetting some of the basics. I just started using Duolingo to work on my vocabulary, and it is one of the most beautiful app I have ever used. It is designed so well, from the ads to the lessons. I enjoy spending time on this app not just because it is helpful, but because it has a smooth, clear layout and it very user friendly.