Duolingo's latest app icon redesign has sparked user concerns, with its sickly depiction of the mascot, Duo the owl, causing a stir. The change, intended to boost engagement, has prompted mixed ...

While in October last year, Duo appeared to be melting. A Duolingo spokesperson said then: “The melting Duo you see is a new app icon that learners will see for a limited time.

Zuckerberg wrote in a June 2016 email to Javier Olivan, who was then Facebook's head of growth, that he wanted a better answer to questions about Snapchat's usage and growth than "because their ...