Character practice.
At your pace.

Four choices. One character.

Choose the matching reading from four options. Correct and incorrect choices are highlighted so you can check your answer, then continue at your own pace. Continue appears after you answer; it becomes “Start end review” or “See results” at the end of a round. For reading marks, choose their function instead of a standalone sound.

Use “Not sure yet” when you need to learn the answer. It counts as a missed answer and reveals the correct choice without guessing. After answering, the lightbulb beside the close button opens character details in a popup, with pronunciation notes, meanings where available, and audio if your device has a local voice installed.

Keyboard controls

Press 1–4 to choose an option, or 0 for “Not sure yet”. After answering, press Enter or Space to continue. Press Escape to close the details popup first, or the attempt when no popup is open.

This app focuses on recognizing characters and readings. It does not teach conversation, grammar, stroke order, or handwriting.

Right card, right time.

LangFlash uses an adapted SM-2 spaced repetition scheduler. Correct answers advance the review interval; a mistake schedules another review in one minute. Due reviews come before new characters.

Missed characters appear once in an end review after all original questions. Your first-pass accuracy stays separate from end-review results. Answers save immediately. Free practice leaves your review schedule and statistics unchanged.

A clear place to start.

• Hiragana and Katakana: each covers 46 basic kana, 25 voiced forms, and 36 combinations, including three rare d-series spellings. Extra collections cover small forms, reading marks, and katakana loanword sounds. Historical kana and Ainu-specific forms are excluded.
• Hangul: all 19 modern consonants and 21 vowels. These are individual letters, rather than all possible syllable blocks.
• Simplified Chinese: all 8,105 general-standard characters. The latest official HSK recognition syllabus provides a path through 3,088 characters across levels 1–9, beginning with the 246 introduced in HSK 1.

Small details matter.

Romanization is a memory aid. Korean sounds vary by position. Consonant audio uses a syllable with ㅏ. Device voices may choose a different reading for an isolated Chinese character. Simplified Chinese names the writing system; pinyin here represents Mandarin pronunciation.

Chinese cards follow Unicode Unihan’s default mainland reading, with additional dictionary readings listed separately. English glosses describe a character and do not assign a meaning to every pronunciation. Missing source glosses are identified. Pinyin uses dictionary tones, with 一 and 不 tone changes shown in examples.

Saved on your device.

Your study history and settings stay in this browser. No account or cloud sync is needed. Install LangFlash to use it like an app; practice and character guides work offline after their resources are cached.

Clearing browser data removes your progress. Export a backup in Settings to keep a copy or move to another device. Device audio uses installed local voices.

Built from published sources.

• Japan Foundation · Kana chart ↗
• National Institute of Korean Language · Romanization ↗
• Official HSK syllabus · Recognition characters ↗
• Unicode Unihan · Readings and definitions ↗
• MDBG · Mandarin dictionary ↗

Chinese standard membership and readings use pinned Unicode 17.0.0 data under the Unicode license. The HSK path follows the November 2025 syllabus specifying July 2026 implementation.