An anonymous reader writes: As you may know, Duolingo is a worldwide chart-topping iPhone language learning app and website that is 100% free — and scientifically proven to work. It just announced the global availability of the latest major update of Duolingo for iPhone, enabling speaking exercises and offline lessons. Today’s iPhone user wants to do more than play games or check in with friends — and Duolingo’s fun, challenging and effective language learning app is the perfect activity on the go. Millions of users are learning a language from scratch or advancing their study, in just minutes a day and with total convenience — in the subway, on an airplane flight, and everywhere in between. Since launching in November 2012, Duolingo has been downloaded over a million times and has a perfect 5-star rating and top ranking without any marketing support from Apple. Duolingo is available to learn Spanish, English, Portuguese, French, German and Italian.
Duolingo is a unique language learning system that is supported by crowdsourced translation. For further information, see his presentation on TED.com. Duolingo was created by Carnegie Mellon computer science professor Luis von Ahn and his graduate student Severin Hacker. Read for more information on Dr. von Ahn: http://en.wikipedia.org/wiki/Luis_von_Ahn
This recent effectiveness study suggests that Duolingo may be more effective than college language classes: