Duolingo: Learn Languages for Free (Android) Editor's Rating: User Rating: Good: Duolingo is completely free and turns language-learning into a game, broken down into short lessons. Progress is stored in the cloud and can be synced between devices. Bad: The app could use a wider variety of question types and support for more languages. Also, in-depth lessons on sentence structure and verb conjugations would be really helpful. Bottom Line ...
Aug. 8, 2013 - CNET