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★★★★★
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Master HSK 1–6 the way you'll actually remember — handwriting drills, syllable-by-syllable pronunciation feedback, spaced repetition that respects how you forget, and pinyin tables that turn tones automatic. No ads. No paywall. Built free, built to last. WHAT YOU GET • HSK 1–6 roadmap with FSRS spaced repetition. Pick your level in onboarding, change it anytime. No paywall — every word, every drill, every feature is free. Content is filtered so you are not drowning in words you are not ready for. • Schedules that match how you forget. Not a plain Leitner box or SM-2 — each review lands when it is most useful so you retain more without piling on more cards per day. If you already use Anki, you'll feel at home. • Daily Mission. One tidy session that interleaves listening and speaking drills on your weakest cards first, so a few minutes a day actually moves the needle. • Hanzi handwriting. Trace characters with real-time stroke recognition powered by Google ML Kit Digital Ink — fully on-device, no network needed. Stroke-basics drills teach the primitives, Radical Quest teaches the building blocks. • Pinyin & tone drills. A dedicated Pinyin Table, Pinyin Lab, and Tone Drill so initials, finals, and the four tones become automatic — not a guess. • Speak & be scored. Record a word or sentence; our pronunciation engine returns a syllable-level score. Choose the on-device engine (Sherpa-ONNX, works offline) or the online engine (Microsoft Azure Speech, higher accuracy). • Immersion Reader. Read authentic Chinese passages tuned to your level. Tap any character for pinyin, meaning, and audio; add it to your deck in one tap through the Mining Inbox. • Built-in dictionary. Fast lookup with pinyin, meanings, radicals, stroke order, and example sentences. • Native-speaker audio. Download a native-speaker syllable bundle once; after that every character has real human audio even without a connection. • Review widget. See how many cards are due today without opening the app. • Daily reminder. One opt-in nudge at a time you choose. No spam. • Dark mode. Forced-dark presentation that is easier on your eyes during long study sessions. FREE. NO ADS. NO SIGN-UP. HanziLab is completely free. No in-app purchases, no subscriptions, no advertising, no account to create. We are not building a funnel — we are building a tool we wish existed. PRIVACY YOU CAN RELY ON Your deck, review history, mined vocabulary, and preferences stay on your device. We do not collect personal data linked to your identity, we do not use advertising SDKs, and we do not request App Tracking Transparency. Handwriting recognition runs on your device. The offline Speak engine runs on your device. The online Speak engine sends only the current drill audio to Microsoft Azure Speech for scoring and then discards it. Full details in our Privacy Policy. LANGUAGES HanziLab speaks your language: English, Vietnamese, French, German, Spanish, Italian, Portuguese, Japanese, Korean, Turkish, and Hindi. QUESTIONS? Email heyku.studio@gmail.com — we read every message. Privacy Policy: https://sites.google.com/view/hanzilab-privacy-policy Terms of Use: https://sites.google.com/view/hanzilab-term-of-use