Once upon a time, Phd students had to laboriously type their entire thesis using an archaic device called a typewriter. They did this in the snow in their bare feet, by candlelight. Thanks to our list of the best note-taking apps for your iPhone, the modern student or businessperson need never break a sweat recording important information, organizing it and sharing it. Your phone is like your own personal stenographer, secretary, and postal service, all in one.