Two years ago I had zero knowledge of the language, today I know all hiragana syllables, half of the katakana and a few kanji. I also know some basic vocabulary.
Yeah, maybe "quite effective" is overstating it.
Yeah, maybe "quite effective" is overstating it.
So, if after two years of using Duolingo you cannot read all the katakana and cannot make a sentence more complex then xxx ha yyy desu it just totally prove how bad the application is. And what's even more damageable is that user think they are making progress and then do not focus on real, useful material.