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Study smarter for IELTS, TOEIC and HSK with AI speaking and writing rooms

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AI-powered practice and scoring for the Duolingo English Test

Ace the Duolingo English Test with AI scoring and 18,000+ practice questions

Chat with any PDF, video, or website and get cited answers in seconds

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A free place to study the Bible with an AI assistant

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Turn your notes into interactive AI quizzes

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A developer's guide to building real-world AI applications

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Search and study millions of public SKILL.md agent skills

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Good ideas, better timing — learn from 2,000+ startup stories

Pass your Dutch driving theory exam the first time with online lessons, quizzes, and practice exams

An AI growth agent that researches, builds and runs your ads across every channel