Review the old, know the new温故知新
Outsmart forgetting.
Wengu schedules every HSK word back to you right before it slips away: real spaced repetition, ten minutes a day.
iPhone today ·
Awaiting App Store approval · Private beta
Tap to reveal.轻点显示
Why “Wengu”论语
Confucius described spaced repetition 2,500 years early.
“Review the old and know the new, and you may be a teacher.” Wengu is named for that line from the Analects. Memory isn’t brute repetition. It’s returning to a word at the right moment, and the right moment is computable.
The method温故
Built for how memory actually works.
Active recall and spaced repetition — the two most effective study techniques cognitive science has measured — scheduled by FSRS-6, one of the most advanced spaced repetition algorithms. It models your personal forgetting curve, and each word returns at the exact moment you’d have lost it.
Recall, don’t reread. Pulling a word from memory is what makes it stick.
Tuned to you. Every answer refits your personal forgetting curve — no averages.
Timing is everything. Not sooner, not later: just before you’d forget.
The material真材实料
Study the exam. Learn the language.
Every band of the new HSK 3.0, real audio on every card, decks that fly offline — and the everyday Chinese the exams never cover.
A page of the story 妃子笑, from the About China shelf. The sentence being read is lit and carries a soft band around its own words, and the sentence beside it sits back; the word the narrator has reached is inked vermilion and hands the colour on to the next as the reading advances, with the pinyin printed above every word.
Read, not just review.
Bands 1–5, native narration, tap any word.
Fits your level.
Every cover shows its band and how much you already know.
The new HSK, in full
The December 2025 syllabus in full: HSK 3.0 runs bands 1 through 6 and one combined band 7–9 — 11,000 words in all. The 5,000 words of HSK 2.0 are kept whole alongside it.
Beyond the exam.
Slang, idioms, dates and numbers — the Chinese you actually use.
- Studio-quality voiceEvery word and story, natively narrated.
- Works offlineLevels download whole; reviews sync later.
The essentials, done properly.
Native audio, offline decks, progress that follows you.
On the lock screen锁屏
A word an hour, before the phone unlocks.
Word of the Hour deals from the deck you’re actually studying — hanzi and pinyin at a glance, the meaning one tap away. Checking the time becomes a dozen tiny reviews a day.
iPhone lock screen at 9:41 with the Wengu widget showing 药, yào, HSK 2. A word sits on your Lock Screen; tapping it reveals the gloss. Its meaning is hidden until the widget is tapped, and the demo loops between the two states: hidden, then revealed as “medicine”.
Wengu温故
Forgetting runs on a schedule.Now you do too.
Free to start, on iPhone today. Android is on the way.
Awaiting App Store approval · Private beta