# BoostChinese > AI-powered Chinese learning app for iOS and Android. Master HSK vocabulary with adaptive spaced-repetition flashcard decks — all levels from beginner to HSK 9. ## Facts - Learn Chinese from English, Spanish, French, Portuguese or Russian (site and app localized in all five). - SM-18 spaced-repetition algorithm schedules every review; daily sessions usually take under 10 minutes. - Hundreds of themed decks: HSK 1-9, travel, business, slang, food and more, with native-speaker videos and audio for every word. - Game modes: Match (reading speed), listening challenges (tones), stroke-by-stroke writing practice, and MyBrain daily reviews. - BoostChinese Classroom lets teachers create classes, assign decks and track student progress. - Free tier available; Plus+ unlocks unlimited decks, all HSK levels, every game mode and removes ads. ## Key pages - [Home](https://www.boostchinese.com/) - [Features](https://www.boostchinese.com/features) - [Pricing](https://www.boostchinese.com/pricing) - [Decks catalog](https://www.boostchinese.com/decks) - [Blog](https://www.boostchinese.com/blog) - [FAQ](https://www.boostchinese.com/faqs) - [About](https://www.boostchinese.com/about) - [Team](https://www.boostchinese.com/team) - [Download](https://www.boostchinese.com/download) - [Compare apps](https://www.boostchinese.com/comparison) - [Contact](https://www.boostchinese.com/contact) - [Careers](https://www.boostchinese.com/careers) ## Blog posts - [BoostChinese Classroom: bring the app into your school](https://www.boostchinese.com/blog/boostchinese-classroom-for-schools): Classroom lets teachers create a class, assign decks and follow every student's real progress. Here's how it works and how to try it with your students. - [Every game mode in BoostChinese, and what each one trains](https://www.boostchinese.com/blog/learn-chinese-by-playing-our-game-modes): Match, listening, writing, MyBrain — what each game in the app actually does, which skill it trains, and when to play which. - [What your stats tab is actually telling you](https://www.boostchinese.com/blog/track-your-chinese-progress): Streaks, words known, accuracy, HSK coverage — a plain-English tour of every number in BoostChinese, what it measures, and which ones are worth checking. - [Inside SM-18: the algorithm that decides when you review](https://www.boostchinese.com/blog/how-the-sm18-algorithm-works): Every card you review teaches the app something about your memory. Here is how BoostChinese schedules reviews so you study less and remember more. - [Introducing BoostChinese Plus+: A Special Thank You to Our Loyal Users! 🎉](https://www.boostchinese.com/blog/introducing-boostchinese-plus): Lifetime Access to Premium Features — Just for You! Thanks for all. - [Master Mandarin with Boost Chinese and Ace the HSK Exam 2024](https://www.boostchinese.com/blog/master-mandarin-with-boost-chinese-and-ace-the-hsk-exam-2024): Ready to embark on a Mandarin journey? - [Master Mandarin with Our Exciting Deck Releases in 2023-2024!](https://www.boostchinese.com/blog/master-mandarin-with-our-exciting-deck-releases-in-2023-2024): Stay tuned, mark your calendars, and get ready to level up your Mandarin! - [Mastering Mandarin: A Guide to Boost Chinese](https://www.boostchinese.com/blog/mastering-mandarin-a-guide-to-boost-chinese): Ever wondered about the secret sauce behind mastering Mandarin? ## Sitemap - [Sitemap index](https://www.boostchinese.com/sitemap.xml) - [Full content for LLMs](https://www.boostchinese.com/llms-full.txt)