Smart lookup
Auto-detects Vietnamese, pinyin, or Chinese input and returns definitions, example sentences, and usage notes.
Products
Products we build and run ourselves
A studio that only builds for other people slowly forgets what it costs to keep software alive. So we run our own products, with our own users, and our own support inbox.
KoiSpeak
Clean, fast, free Chinese dictionary
KoiSpeak is a bilingual Chinese-Vietnamese dictionary and learning platform. Its lookup auto-detects what you typed, whether Vietnamese, pinyin, or Chinese characters, so learners never have to think about input modes.
Around the dictionary sits a full study environment: grammar organised by HSK level, radical and handwriting lookup for characters you cannot type, flashcards for retention, and a reading room of authentic texts.
Where you can use it
Inside the product
What KoiSpeak does
HSK grammar library
Grammar points organised by HSK level 1 to 6, so study follows the exam you are actually preparing for.
Radical lookup
Find any character through the Kangxi radical system when you know the shape but not the reading.
Handwriting & OCR
Draw a character or point a camera at one. Smart recognition turns it into a searchable entry.
Flashcards
Turn any lookup into a card and drill vocabulary until it sticks.
Reading room
Authentic texts with tap-to-look-up, so reading practice does not mean switching apps every sentence.
Vocabulary by topic
Curated sets for family, food, travel, work, school, and sport: the words learners need first.
Learning blog
Articles on grammar, exam strategy, and study habits, written for learners who want to go deeper.
Product studio
How we treat our own products
The same standards we hold client work to, applied where the consequences land on us.
Ship small, ship often
KoiSpeak went live as a dictionary and nothing else. Every feature since then earned its place with real usage.
Speed is a feature
A dictionary people reach for mid-sentence has to be instant. Performance budgets are set before design starts.
Free where it counts
Core lookup stays free. A learner who cannot pay should still be able to read the sentence in front of them.
Building a product of your own?
We have been through discovery, launch, app store review, and the long middle where you keep a product alive. We can shorten that road for you.