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Pinyin display

Tone marks, colored nǐ hǎo Tone marks nǐ hǎo Tone numbers ni3 hao3 Hidden —

Tone coloring

All tones Color every tone (1-4). Third tone only Only highlight tone 3 — the trickiest with sandhi. Off No tone coloring. Useful for color-blind accessibility.

High contrast Thicker borders and stronger foreground contrast. Reduce motion Minimise animations even when system preference isn't set.

Practice

Session length 20 items

52550

Daily goal 10 min

53060

Earn a streak freeze for every 7 consecutive days — freezes automatically cover a missed day so your streak doesn't break.

Audio Enable browser speech synthesis. Auto-play audio Play pronunciation automatically on audio prompts and correct answers.

Speech synthesis isn't available in this browser.

Show radical hints Reveal the radical on demand during drills. Show tone sandhi Apply 3-3 → 2-3 sandhi when rendering pinyin. Advanced.

SRS algorithm

Pick the spaced-repetition scheduler. SM-2 is the original SuperMemo algorithm we've shipped since v1. FSRS-5 is a more accurate two-component memory model with better retention/effort. Either is safe — switching only affects the schedule of future reviews.

What actually changes when I switch?

SM-2 doubles intervals on each correct answer, halves them on a wrong one. Simple, well-tested, but assumes every card grows the same way.

FSRS-5 tracks two numbers per card — stability (how long you can go before forgetting) and difficulty (how shaky this specific card is for you). It spaces stable cards more aggressively and shaky ones more conservatively, so day-to-day review counts are typically lower for items you've been getting right.

Switching is reversible. Existing review history isn't lost; the next review on each card initialises FSRS state from your most recent rating.

Reminders Daily reminder Notify me if I haven't met today's goal by a chosen time.

Help

Replay onboarding tour

Re-show the three-step intro that explains tones, drills, and spaced repetition.

Data

Back up or restore your progress. All data lives in your browser — clearing the cache without an export will wipe it.

HanziFluency v0.1.0 · 412 chars · 176 words

Export progress

Downloads a JSON file with settings, SRS records, session history, and achievements.

Import progress

Replaces your current settings, SRS records, session history, and achievements with the contents of a previously-exported file. Review the preview before confirming.

Clear SRS progress

Removes every character's review history, ease factor, and mastery level. Also resets achievement unlocks (they're derived from SRS state). Session stats are kept.

Clear session history

Removes session records (streak calendar, totals, tone-error panel). SRS records are kept.