I find duolingo extremely effective for recognising and recalling vocabulary. If you complete a course you learn around 2000 words on context with sample sentences.
Vocabulary is tedious and maybe 1/4 of what goes into learning a language, so I’ll go against the common opinion and say it’s quite solid. But it does nothing for the other 3/4, you’ll never be able to think in Spanish, produce sentences, or understand when you’re spoken to with duolingo alone.
12,000 consoles … for an estimated value of more than 47.5 million euros.
Each console costs 40 grand?