Measuring Duolingo’s quality by kana learning is not a good idea. Kana are so simple you can learn them in a week using any method ever. What Duolingo fails at is the important part of learning Japanese (aside from kanji) - grammar and sentence structuring.
You’re much better off reading an actual textbook.
I personally don’t hate on Duolingo because it’s free but it tends to waste people’s times and gives them false impressions about language learning.
You’re much better off reading an actual textbook.
I personally don’t hate on Duolingo because it’s free but it tends to waste people’s times and gives them false impressions about language learning.