Built for Chinese. Nothing else.

Dictionary, spaced repetition, stroke order, word map, text reader, and six review modes — integrated in one offline app.

WORD MAP

5,000 words. Six rings. One map of everything you know.

Every HSK word has a fixed position on a concentric ring map. Ring 1 is HSK 1 (150 words, A1). Ring 6 is HSK 6 (2,500 words, C2). Words are clustered by topic — food, time, travel, body — so related characters sit together. Unlearned words appear as faint dots. Words in review glow amber. Mastered words turn solid. Zoom out to see your full progress. Zoom in to browse and tap individual characters.

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5,000 words. Six rings. One map of everything you know.
114,000+ ENTRIES

A real dictionary, not a glossary.

Full CC-CEDICT with FTS5 indexing. Search by English, pinyin (tone numbers or marks), simplified, or traditional characters. Every entry shows: all definitions, pinyin with tone marks, and a detailed stroke order diagram. Results appear as you type, typically in under 50ms. Save any word to your lists with one tap. The entire dictionary ships with the app — no internet needed, ever.

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A real dictionary, not a glossary.
SPACED REPETITION

FSRS — the algorithm that outperforms SM-2.

Longtang uses FSRS, the open-source scheduling algorithm proven to achieve better retention with fewer reviews than Anki's SM-2. Choose from six review modes: character-to-definition, definition-to-character, listening, handwriting trace, smart mix, or random. Rate each card Again / Hard / Good / Easy. Track your daily due count, accuracy, and streaks. Cards due today are always one tap away from the word map.

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FSRS — the algorithm that outperforms SM-2.
TEXT READER

Paste anything. Tap to learn.

Paste a paragraph of Chinese — a news article, a text message, a page from a novel. Longtang auto-segments it into individual words using jieba tokenization. Every word becomes tappable: tap to see its dictionary entry, tap again to save it for SRS review. The reader shows you which words are new and which you already know. It turns passive reading into active vocabulary mining.

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Paste anything. Tap to learn.

People who take Chinese seriously use Longtang

I used Anki for two years. Setting up Chinese decks was half the work. Longtang gave me a better dictionary, better SRS, and stroke order — out of the box.
Sarah K.
The word map changed how I think about progress. I'm not just memorizing a list — I can see exactly where I am across all six HSK levels.
Marco B.
I paste WeChat conversations into the text reader every morning. Ten minutes later I've saved a dozen new words and they're already in my review queue.
Lena W.
114,000 dictionary entries, offline, with instant search. I deleted Pleco. This is the only Chinese dictionary I need on my phone.
James T.
Die Strichfolge-Diagramme fuer 9.500 Zeichen — das bietet keine andere App auf Deutsch. Endlich verstehe ich, wie die Zeichen aufgebaut sind.
Amelie D.
I used Anki for two years. Setting up Chinese decks was half the work. Longtang gave me a better dictionary, better SRS, and stroke order — out of the box.
Sarah K.
The word map changed how I think about progress. I'm not just memorizing a list — I can see exactly where I am across all six HSK levels.
Marco B.
I paste WeChat conversations into the text reader every morning. Ten minutes later I've saved a dozen new words and they're already in my review queue.
Lena W.
114,000 dictionary entries, offline, with instant search. I deleted Pleco. This is the only Chinese dictionary I need on my phone.
James T.
Die Strichfolge-Diagramme fuer 9.500 Zeichen — das bietet keine andere App auf Deutsch. Endlich verstehe ich, wie die Zeichen aufgebaut sind.
Amelie D.
FSRS actually works. I went from 40% retention with Anki's SM-2 to staying above 85% in Longtang. Fewer reviews, better results.
Thomas R.
Je l'utilise dans le metro tous les jours. Le dictionnaire hors-ligne est instantane, et les six modes de revision gardent les sessions variees.
Claire M.
One-time purchase, no upsells, no subscription nag screens. Just a deep, focused tool for learning Chinese. This is how software should work.
David H.
I'm at HSK 4 and the outer rings of the word map are calling to me. Seeing mastered words fill in is genuinely addictive.
Anna S.
Six quiz modes keep things fresh. Character-to-definition, listening, handwriting trace — I rotate through all of them. My recall has never been better.
Robert L.
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114,000 entries. 9,500 stroke diagrams. Zero subscriptions.

Dictionary. Spaced repetition. Stroke order. Word map. Text reader. All offline. One purchase.

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