Chess instruction launches on Android phones, and Duolingo customers with iPhones will soon be able to play chess against ...

Meanwhile, Duolingo stock has been in a slump.During this year's Duocon livestream, Duolingo announced product updates that ...

Pittsburgh-based Duolingo announced several upgrades Tuesday to its popular learning app. The intrigue: Duolingo has moved beyond just language learning over the years — adding math, music and chess — ...