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CEFR levels A1–C1 • Learn by doing, not cramming • 7 languages
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The science of language
Research shows that knowing the most common 2,000 words lets you understand over 90% of everyday conversation. We build your vocabulary in exactly that order — from A1 to C1, word by meaningful word.
Grammar stops being scary once words feel familiar. That's not a shortcut — that's how children learn their first language.
3,500+ words — unlock each level as you grow
CEFR-matched cards in both directions, with quiz mode.
Stories written from your own word list — readable from day one.
Native pronunciation on every word. Soundboards and audio stories.
CEFR grammar topics with explanations and exercises.
No catch. Really.
Language apps charge €15/month and remind you daily. We don't. CrokyLingo is free because learning a language should be a right, not a product.
Add as many words as you like. No daily cap, no paywall hiding your own progress.
No streak pressure, no guilt trips, no scary birds. Croky is happy you're here — even if you haven't practiced in a week.
Italian, Spanish, Dutch, German, French, Chinese, Polish — switch anytime, always free.
Independent project. No investors, no growth targets. Just you and the frog.
Guides, research, and practical tips on vocabulary, proficiency frameworks, and what it actually takes to learn a language.
A1, B2, C1 — you've seen these on every language app. We break down what CEFR actually means and how to use it to guide your learning from zero to fluency.
Total speakers, native vs. second-language learners, and year-over-year growth trends — with charts showing the global language landscape in 2025.
CEFR works beautifully for European languages. Chinese is different. We explain the HSK framework and why Mandarin's characters and tones demand a different learning path.