Chess instruction launches on Android phones, and Duolingo customers with iPhones will soon be able to play chess against each other. Alex Valdes from Bellevue, Washington has been pumping content ...

Duolingo has been through a lot of changes over the past few years. What was once solely a language-learning app has grown into a social media marketing machine, a destination for math and music ...

"We have had people play here from every continent except Antarctica, we've even had people from cruise ships pop in and ...