Duolingo is a free service that helps you learn languages with your friends while simultaneously contributing to translate real-world content from the Web. Duolingo was created by a team of computer scientists, designers, and language specialists to empower language learners.
Some language learning websites claim to be free, when in fact they are only free to use for a limited time. Duolingo has a different philosophy. Their language learning tools are completely free, because while users are learning they are also creating valuable translations for the world.
This unique setup means that Duolingo is offered without ads, hidden fees, or subscriptions—Duolingo is 100% free, today, tomorrow and forever.