Yes — the writing trainer is permanently free with no sign-up. Your progress, streak, and review queue save locally in your browser so they survive across visits on the same device.

Yes — the tool is built for mouse, finger and stylus input. On a phone you trace directly with your finger; on a tablet with an Apple Pencil or stylus the experience is excellent. Desktop browsers work the same.

HSK 1 through HSK 6 (over 1,200 unique characters across all six levels), plus the 30 most common radicals. HSK 3 to 6 are lazy-loaded the first time you tap their tab, so the initial page load stays fast.

Every character you watch is enrolled into a review queue. After tracing or quizzing, you grade yourself: Again (within 10 minutes), Hard (1 day), Good (3 days), or Easy (7+ days). The scheduler is SM-2 inspired — the same family of algorithms behind tools like Anki. Cards you struggle with come back sooner, cards you nail go longer between reviews.

Yes — tap the share icon on any character and choose Download practice sheet. You’ll get a branded A4 PDF with the stroke-order reference and a 4×5 grid of 米字格 tracing cells. Perfect for printing and practising offline.

Not yet. Progress saves locally in your browser, so it persists between visits on the same device. If you want sync across devices, drop us a note via the contact form — we’re tracking interest.