For the purpose of this article, we only consider apps that offer multiple languages. The reason is to keep the suggestions broad and applicable to a wide range of people.  If we included single-language apps, we might end up with hundreds of suggestions, as there are many. Human Japanese comes to mind. It has both free and paid versions, but it only teaches Japanese with an emphasis on learning to write. Mandarin students swear by ChineseSkill, a free game-based app that only focuses on Chinese for beginners.  The one language where we've seen very few good, free learning apps is American Sign Language—the best one by far is Lifeprint.com, also known as ASLU. Don't be turned off by the old-school site design, and start with the numbered video lessons in the top right corner of the homepage. If you're willing to pay to learn ASL, we like Sign It ASL better. Sign It ASL is free, however, for families with deaf or hard of hearing children younger than 36 months who apply.