Duolingo is opening up its advanced language learning content offering to free users, allowing them to acquire skills that were previously reserved for paid subscribers.

Still, it's free to use, fun in a quirky way, and extremely easy to get started. For about a year, I used Duolingo’s language-learning app religiously, cruising my way through 60% of the German ...

The company made more features available to free users to improve stickiness and drive daily active user growth, CEO Luis von ...