It's useful for getting a grasp of the tourist version of whatever language you're interested in. "Where's the bathroom?" And so forth.
Unfortunately it advertises itself as a means of becoming fluent in a language (or at least it used to) and that's simply not accurate for 99% of users and it's not a real substitute for text books and other learning materials if you're serious about learning a language.
Well with Duolingo you have exactly the same chance of mastering either language, which is nil.
People shit on it, but I sort of like it. Seems like a very low effort way of getting familiar with the basics of grammar and a bit of vocabulary.
It's useful for getting a grasp of the tourist version of whatever language you're interested in. "Where's the bathroom?" And so forth.
Unfortunately it advertises itself as a means of becoming fluent in a language (or at least it used to) and that's simply not accurate for 99% of users and it's not a real substitute for text books and other learning materials if you're serious about learning a language.