The Encyclopedia Britannica is a very respected name, having produced encyclopaedias for many years, always with thorough information and a presentable format. In the new age of apps, the Encyclopedia Britannica free app lets users enjoy this knowledge at their fingertips, in digital format. There are over 80,000 articles written by experts, with famous contributors from many fields. You can also take quizzes to test your knowledge and view photographs and diagrams. This is a very impressive library of information, but could use a nicer UI.