Re:Duolingo becomes first VC-funded $1B Pittsburgh tech startup
by morphogenesis on Saturday December 07, 2019 @10:16AM
(#21730671)
Babbel does grammar, yes, as well as explanations of exceptions and idioms, and the sentences and dialogues are culturally relevant to the language
Duolingo also has a weird discrimination between iOS vs Web/Android. In the iPhone App you lose health with wrong answers and wait for regeneration or have to buy "hearts", this restriction is not present on Web.