About Cidou — English Quiz Battles
Free English practice through 1v1 quiz battles — vocabulary, grammar, listening, friend rooms, 89k+ questions.
Cidou (cidou.cc) is a free English practice web app for Chinese-speaking learners. Practice vocabulary, grammar, collocations, and listening through fast-paced 1v1 quiz battles. Features include live matchmaking, friend rooms with synced scores, daily challenges, an 89,000+ question bank, wrong-book review, and spaced repetition. Works in any modern browser; Android APK and iOS add-to-home-screen supported.
